Education

Ph.D., School of Civil and Environmental Engineering, Nanyang Technological University, Singapore, 2011-2016

M.Sc., School of Environmental Science & Engineering, Nanyang Technological University, Singapore, 2010-2011

B.E., School of Civil and Environmental Engineering, Nanyang Technological University, Singapore, 2005-2009

Research interests

Multifunctional carbonaceous membrane fabrication, electrospinning, oil/water separation, aerogel

Publications

• M.H. Tai, B.C. Mohan, Z. Yao and C.H. Wang, “Superhydrophobic leached carbon Black/Poly (vinyl) alcohol aerogel for selective removal of oils and organic compounds from water”, Chemosphere, 286, p.131520 (2022).
• D. Mitra, M.H. Tai, E.B. Abdullah, C.H. Wang and K.G. Neoh, “Facile fabrication of porous waste-derived carbon-polyethylene terephthalate composite sorbent for separation of free and emulsified oil from water”. Separation and Purification Technology, 279, p.119664 (2021).
• O. Yaqubi, M.H. Tai, D. Mitra, C. Gerente, K.G. Neoh, C.H. Wang, Y. Andres^, “Adsorptive Removal of Tetracycline and Amoxicillin from Aqueous Solution by Leached Carbon Black Waste and Chitosan-carbon Composite Beads”, Journal of Environmental Chemical Eng., 9(1) 104988 (2021).
• D. Mitra, B. C. Mohan, M.H. Tai, C. Zhou, M. H. B. Hashim, K. Y.H. Gin, C.H. Wang, K. G. Neoh, “Emerging Pharmaceutical and Organic Contaminants Removal using Carbonaceous Waste from Oil Refineries”, Chemosphere, 271, 129542 (2021).
• Tai, M.H., Gao, P., Tan, B.Y.L., Sun, D.D. and Leckie, J.O., 2014. Highly efficient and flexible electrospun carbon–silica nanofibrous membrane for ultrafast gravity-driven oil–water separation. ACS applied materials & interfaces, 6(12), pp.9393-9401.
• Tai, M.H., Juay, J., Sun, D.D. and Leckie, J.O., 2015. Carbon–silica composite nanofiber membrane for high flux separation of water-in-oil emulsion–Performance study and fouling mechanism. Separation and Purification Technology, 156, pp.952-960.
• Tai, M.H., Tan, B.Y.L., Juay, J., Sun, D.D. and Leckie, J.O., 2015. A Self‐Assembled Superhydrophobic Electrospun Carbon–Silica Nanofiber Sponge for Selective Removal and Recovery of Oils and Organic Solvents. Chemistry–A European Journal, 21(14), pp.5395-5402.
• Tai, M.H., Gao, P., Tan, B.Y.L., Sun, D.D. and Leckie, J.O., 2015. A hierarchically-nano structured TiO2-carbon nanofibrous membrane for concurrent gravity-driven oil-water separation. International Journal of Environmental Science and Development, 6(8), p.590.
• Tan, B.Y.L., Tai, M.H., Juay, J., Liu, Z. and Sun, D., 2015. A study on the performance of self-cleaning oil–water separation membrane formed by various TiO2 nanostructures. Separation and Purification Technology, 156, pp.942-951
• Tan, B.Y.L., Liu, Z., Gao, P., Tai, M.H. and Sun, D.D., 2016. Oil‐Water Separation Using a Self‐Cleaning Underwater Superoleophobic Micro/Nanowire Hierarchical Nanostructured Membrane. ChemistrySelect, 1(7), pp.1329-1338.
• Gao, P., Li, A.R., Tai, M.H., Liu, Z.Y. and Sun, D.D., 2014. A hierarchical nanostructured carbon nanofiber–In2S3 photocatalyst with high photodegradation and disinfection abilities under visible Light. Chemistry–An Asian Journal, 9(6), pp.1663-1670
• Gao, P., Tai, M.H. and Sun, D.D., 2013. Hierarchical TiO2/V2O5 multifunctional membrane for water purification. ChemPlusChem, 78(12), pp.1475-1482.

Video Presentation

Education

Ph.D, Thermal Engineering, East China University of Science and Technology, China, 2016-2021.

B.Eng., Energy and Power Engineering, East China University of Science and Technology, China, 2012-2016.

Research Interests

Gas-solid flow;

Gasification\ combustion;

Research highlights

Ø  To raise diffusion questions in present gasification/combustion reaction kinetics measurements. A novel experimental method is applied to compare the diffusion and reaction characteristics in different particle swarms and TGA experiments. It is revealed that the diffusion conditions and temperature effects should be reconsidered in previous kinetics measurements of coal and petcoke gasification and combustion reactions. (Fuel 2019, 241: 973-984; AIChE J 2018, 64 (11): 4009-4018; Energy & Fuels 2019, 33 (4): 3057-3067.)

Ø  To raise a reaction mode of high ash content coal char gasification regarding to the residual carbon in slag. The novel reaction mode indicated that the increase of reaction temperature not only increase the reaction rate but also decrease the residual carbon in molten slag. (Energy & Fuels 2018, 32 (11): 11335-11343; Energy Fuel 2018, 32 (2): 1550-1557)

Ø  Investigation of the reaction kinetics of single petcoke particle at high temperatures. It is revealed that the reaction rate increased with the conversion. The pore development demonstrated the increase of surface area. What’s more, the pore development is related to the non-uniform distribution of reactive sites and the high graphitization of carbon. Reaction mode of single petcoke particle is developed.(in press, Chinese J. Chem. Eng. DOI: 10.1016/j.cjche.2019.02.025.) Ø  Particle fluctuating motions induced by chemical reactions. A novel particle fluctuating motions induced by chemical reaction are investigated. The fluctuating velocity of particles increased with the combustion temperature. It is revealed that the irregular micro-structure of particles and nonuniform distribution of active sites on particle surface account for the particle fluctuations.

Publications

1. M. Liu, F. Li, H. Liu, C.H. Wang^{, “}Synergistic effect on co-gasification of chicken manure and petroleum coke: an investigation of sustainable waste management”, Chem. Eng. Journal, 128008 (2020).
2. Arora, J. Jung, M. Liu, X. Li, A. Goel, J. Chen, S. Song, C. Anderson, D. Chen, K. Leong, S. H. Lim, S. L. Fong, S. Ghosh, A. Lin, H.W. Kua, H.T.W. Tan, Y. Dai, C.H. Wang, “Gasification biochar from horticultural waste: An exemplar of the circular economy in Singapore”, Science of the Total Environment 781, 146573 (2021).

Education

B.Eng., Thermal Energy and Power Engineering, Shanghai Jiao Tong University, China, 2012-2016.

Research Interests

• Food waste gasification
• CCHP systems

 Journal Publications

• J. Chen, X. Li, Y. Dai, C.H. Wang^{, “}Energetic, economic, and environmental assessment of a Stirling engine based gasification CCHP system”, Applied Energy, 281, 116067 (2021).
• X.Y. Sun, J.L. Chen, Y. Zhao, X. Li, T.S. Ge, C.H. Wang, Y.J. Dai, “Experimental investigation on a dehumidification unit with heat recovery using desiccant coated heat exchanger in waste to energy system”, Applied Thermal Engineering, 185, 116342 (2021).
• Arora, J. Jung, M. Liu, X. Li, A. Goel, J. Chen, S. Song, C. Anderson, D. Chen, K. Leong, S. H. Lim, S. L. Fong, S. Ghosh, A. Lin, H.W. Kua, H.T.W. Tan, Y. Dai, C.H. Wang, “Gasification biochar from horticultural waste: An exemplar of the circular economy in Singapore”, Science of the Total Environment 781, 146573 (2021).
• Li, J. Chen, X. Sun, Y. Zhao, C. Chong, Y. Dai, C.H. Wang^, “Multi-criteria decision making of biomass gasification-based cogeneration systems with heat storage and solid dehumidification of desiccant coated heat exchangers”, Energy 233, 121122 (2021).

Conference Publications/ Presentations

• Jialing Chen, Xian Li, Yanjun Dai, Chi-Hwa Wang. Theoretical Analysis of Energy Recovery from Food Waste Based on an Integrated Gasification and Stirling Engine System. 18th International Conference on Sustainable Energy Technologies, Kuala Lumpur, Malaysia, 20-22 August 2018.

 News

Education

• Ph.D., Chemical and Biomolecular Engineering, National University of Singapore, Singapore (2017-Present)
• B.Tech., Chemical Engineering, Anna University (2013-2017)

Research Interests

• Drug delivery systems
• Medical devices

Publications

1. V. Sunil, A. Mozhi, W. Zhan, J.H. Teoh, C.H. Wang, “Convection enhanced delivery of light responsive antigen capturing oxygen generators for chemo-phototherapy triggered adaptive immunity”, Biomaterials, in press (2021).
2. Mozhi A*, Sunil V*, Zhan W, Ghode PB, Thakor NV, Wang C-H. Enhanced penetration of pro-apoptotic and anti-angiogenic micellar nanoprobe in 3D multicellular spheroids for chemophototherapy. Journal of Controlled Release. 2020. *Authors contributed equally to this work
3. Davoodi, L.Y. Lee, Lee, Q.Xu, V. Sunil, Y. Sun, S. Soh, C.H. Wang, “Drug Delivery Systems for Programmed and On-demand Release”, Advanced Drug Delivery Reviews, 132, 104-138 (2018).
4. Kaleekkal, N. J., Radhakrishnan, R., Sunil, V., Kamalanathan, G., Sengupta, A., & Wickramasinghe, R. (2018). Performance evaluation of novel nanostructured modified mesoporous silica/polyetherimide composite membranes for the treatment of oil/water emulsion. Separation and Purification Technology, 205, 32-47.

Conference Presentations

1. Vishnu Sunil, Vijay Kumar Sharma, Chi-Hwa Wang. Ultrasound triggered synergistic thrombolysis using tPA loaded microbubbles for the treatment of acute ischemic stroke. Poster presentation delivered at the American Institute of Chemical Engineers (AICHE) Annual Meeting, Pittsburgh, Oct 2018.
2. Vishnu Sunil, Vijay Kumar Sharma, Chi-Hwa Wang. Biofabrication of ultrasound responsive tPA loaded microbubbles with narrow size distribution and enhanced stability for the treatment of acute ischemic stroke. Poster presentation delivered at the International Society of Pharmaceutical Engineers (ISPE) Annual Meeting, Philadelphia, Nov 2018.
3. Vishnu Sunil, Anbu Mozhi, Chi-Hwa Wang.Glutathione modified Pro-Apoptotic and Anti-Angiogenic Micellar Nanoprobe for Chemophototherapy of High-grade Glioma. Poster presentation delivered at the Controlled Release Society Annual Meeting, Valencia, July 2019.

Video Presentation

 Current Website (https://fcl.ethz.ch/people/researchers/jia-heng-teoh.html)

Education

Ph.D., Chemical and Biomolecular Engineering, National University of Singapore, Singapore, 2017 – 2022.

B.Eng., Chemical and Biomolecular Engineering, Nanyang Technological University, Singapore, 2017.

Research Interests

• Hydrogel development for 3D printing in wound healing and healthcare applications.
• Application of bioreactor systems in the post-processing step of skin bioprinting.

Journal Publications

• J. H. Teoh, F. T. A. Shakoor, C. H. Wang, “3D printing methyl cellulose hydrogel wound dressings with parameter exploration via Computational Fluid Dynamics simulation,” Pharm. Res. (2021) (Accepted)
• A. Mozhi, A. K. Prabhakar, B. C. Mohan, V. Sunil, J. H. Teoh, C. H. Wang, “Toxicity effects of size fractions of incinerated sewage sludge bottom ash on human cell lines,” Environ. Int., 158, 106881 (2022)
• J. H. Teoh, S. M. Tay, J. Fuh, C. H. Wang, “Fabricating Scalable, Personalized Wound Dressings with Customizable Drug Loadings via 3D Printing,” J. Control Release, 341, 80 – 94 (2022)
• J. H. Teoh, A. Mozhi, V. Sunil, S. M. Tay, J. Fuh, C. H. Wang, “3D Printing Personalized, Photocrosslinkable Hydrogel Wound Dressings for the Treatment of Thermal Burns,” Adv. Func. Mater, 31 (48), 2105932 (2021)
• V. Sunil, A. Mozhi, W. Zhan, J. H. Teoh, C. H. Wang, “Convection enhanced delivery of light responsive antigen capturing oxygen generators for chemo-phototherapy triggered adaptive immunity,” Biomaterials, 120974 (2021)
• S. Ramasamy, P. Davoodi, S. Vijayavenkataraman, J. H. Teoh, A. M. Thamizhchelvan, K. S. Robinson, B. Wu, J. Y. H. Fuh, T. DiColandrea, H. Zhao, E. B. Lane, C. H. Wang, “Optimized construction of a full thickness human skin equivalent using 3D bioprinting and a PCL/collagen dermal scaffold,” Bioprinting, 21, e00123 (2021)
• J. H. Teoh, A. M. Thamizhchelvan, P. Davoodi, S. Ramasamy, S. Vijayvenkataraman, Q. Yang, T. Dicolandrea, H. Zhao, J. Y. H. Fuh, C. H. Wang , “Investigation of the Application of a Taylor-Couette Bioreactor in the Post-Processing of Bioprinted Human Dermal Tissue,” Biochem. Eng. J., 151, 107317 (2019)
• J. Qiao, W. C. Yan, J. H. Teoh, Y. W. Tong, C. H. Wang, “Experimental and Computational Studies of Oxygen Transport in a Taylor-Couette Bioreactor, Chem. Eng. J., 334, 1954 – 1964 (2017).
• J. H. Teoh, Y. W. Tong, C. H. Wang, “Experimental and Computational Studies of Oxygen Transport in a Taylor-Couette Bioreactor, Chem. Eng. J., 334, 1954 – 1964 (2017).

Conference Publications/Presentations

• J. H. Teoh, A. Mozhi, C. H. Wang, “Personalizing Wound Dressings Via 3D Printing for the Treatment of Thermal Burns,” 2021 AIChE Annual Meeting, Boston (7 – 11 November 2021), Virtual (15 – 19 November 2021)
• V. Sunil, A. Mozhi, W. Zhan, J. H. Teoh, C. H Wang, “Convection Enhanced Delivery of Light Responsive Antigen Capturing Oxygen Generators for Chemo-Phototherapy Triggered Adaptive Immunity,” 2021 AIChE Annual Meeting, Boston (7 – 11 November 2021), Virtual (15 – 19 November 2021)
• J. H. Teoh, A. M. Thamizhchelvan, C. H. Wang, “Systematic Application of 3D Bioprinting in the Fabrication of a Composite Full Thickness Human Skin Model,” 2020 Virtual AIChE Annual Meeting, 16 – 20 November 2020.
• J. H. Teoh, A. M. Thamizhchelvan, C. H. Wang, “Post-Processing of 3D Bioprinted Human Dermal Tissue in the Dynamic Culture Environment of a Taylor-Couette Device,” 2019 AIChE Annual Meeting, Orlando, Florida, U.S.A., 10 – 15 November 2019
• J. H. Teoh, C. H. Wang, “Production of Skin Tissue via 3D Bioprinting,” 2019 Controlled Release Society Annual Meeting, Valencia, Spain, 21 – 24 July 2019.
• J. H. Teoh, R. Deng, C. H. Wang, “Computational and Experimental Investigations of the Interplay of Interactions between Gas, Solid and Liquid Phases in the Taylor-Couette Flow”, The 14th International Conference on Gas-Liquid and Gas-Liquid-Solid Reactor Engineering (GLS-14), Guilin, China, 31 May – 3 June, 2019.
• J. H. Teoh, R. Deng, C. H. Wang, “From Bubbles to Cells: A decade of investigation into the phenomenon of object motion in the Taylor-Couette flow,” 20^th International Couette-Taylor Workshop , Marseilles, France, 11 – 13 July 2018.
• J. Qiao, R. Deng, J. H. Teoh, C. H. Wang, “From Bubbles to Cells: A decade of investigation into the phenomenon of object motion in the Taylor-Couette flow,” 20^th International Couette-Taylor Workshop , Marseilles, France, 11 – 13 July 2018.

Video Presetation

 Personal Website

Education

Ph.D., Chemical and Biomolecular Engineering, National University of Singapore, Singapore (2017-2021)

B.S., Chemistry, Nanjing University, China, 2013-2017.

Research Interests

Waste-to-Resource Conversion

Publications

1. Cui, X. Q. Li, H. Yao, Z. Y. Shen, Y. He, Z. L. Yang, X. E. Ng, H. Y. Wang, C. H., et al., Removal of nitrate and phosphate by chitosan composited beads derived from crude oil refinery waste: Sorption and cost-benefit analysis. Journal of Cleaner Production 2019, 207, 846-856. DOI 10.1016/j.jclepro.2018.10.027
2. Li, H., et al., High-Purity V2O5 Nanosheets Synthesized from Gasification Waste: Flexible Energy Storage Devices and Environmental Assessment. Acs Sustainable Chemistry & Engineering 2019, 7 (14), 12474-12484. DOI 10.1021/acssuschemeng.9b02066
3. Zhan, G. W.,Yao, Z. Y., Ng, W. C., Li, H., Lim, M. X. Zhi, Y. W., Koh, S. N. Wang, C. H., Economic production of monoclinic bismuth vanadate from waste vanadium ions: Process design and cost-benefit analysis. Journal of Cleaner Production 2019, 240. DOI 10.1016/j.jclepro.2019.118188

Conference Presentations

• Environmentally-Responsible Conversions from Gasification Waste to Energy Storage Devices: Synthesis of Waste-Derived Nanomaterials and Environmental Evaluation He Li, Hailin Tian, Xiaonan Wang, Chi-Hwa Wang and Po-Yen Chen, 2019 AIChE Annual Meeting. Hyatt Regency, Orlando, USA, November 10-15, 2019.
• Waste to Resource: Synthesis of Electrolyte and Electrode Material in Vanadium Redox Flow Battery from Leachate of Industrial Waste He Li and Chi-Hwa Wang, 2019 AIChE Annual Meeting. Hyatt Regency, Orlando, USA, November 10-15, 2019.
  

Education

Ph.D., Chemical Engineering, West Virginia University, United States, 2014-2019.

M.Eng., Thermal Engineering, Tsinghua University, China, 2011-2014.

B.Eng., Thermal Engineering, Tsinghua University, China, 2007-2011.

Research Interests

• Process modeling and simulation with the integration of engineering science, including artificial intelligence, machine learning, model predictive control, and process intensification
• Process performance assessment, including energy assessment, life-cycle assessment, and techno-economic assessment
• Process multi-objective optimization
• Surrogate-based global optimization method for computationally expensive problems

Research highlights

Publications

• Xin He, Chi-Hwa Wang, and Christine Annette Shoemaker. Multi-objective Optimization of an Integrated Biomass Waste Fixed-bed Gasification System for Power and Biochar Co-production. Computers and Chemical Engineering (2021):107457.
• Xin He, Qiang Hu, Christine Annette Shoemaker, Haiping Yang, and Chi-Hwa Wang. Dynamic Modeling with Experimental Calibration for the Syngas Production from Biomass Fixed-bed Gasification. AIChE Journal (2021): e17366.
• Qiang Hu, Xin He, Zhiyi Yao, Yanjun Dai, Chi-Hwa Wang. Gaseous production kinetics and solid structure analysis during thermochemical conversion of biomass pellet. Journal of Energy institute 98 (2021): 53-62.
• Fanghua Li, Xin He, Arora Srishti, Shuang Song, Hugh Tiang Wah Tan, Daniel J. Sweeney, Subhadip Ghosh, and Chi-Hwa Wang. “Water hyacinth for energy and environmental applications: A review.” Bioresource Technology (2021): 124809.
• Xin He and Fernando V. Lima. A modified SQP-based model predictive control algorithm: application to supercritical coal-fired power plant cycling. Industrial & Engineering Chemistry Research 59, no. 35 (2020): 15671-15681.
• Fanghua Li, Xin He, Christine Annette Shoemaker, and Chi-Hwa Wang. “Experimental and numerical study of biomass catalytic pyrolysis using Ni2P-loaded zeolite: Product distribution, characterization and overall benefit.” Energy Conversion and Management 208 (2020): 112581.
• Zhiyi Yao, Xin He, Qiang Hu, Wei Cheng, Haiping Yang, and Chi-Hwa Wang. “A Hybrid Peripheral Fragmentation and Shrinking-core Model for Fixed-bed Biomass Gasification.” Chemical Engineering Journal (2020): 124940.
• Xin He and Fernando V. Lima. Development and implementation of advanced control strategies for power plant cycling with carbon capture. Computers & Chemical Engineering 121 (2019): 497-509.
• Xin He, Yifan Wang, Debangsu Bhattacharyya, Fernando V. Lima and Richard Turton. Dynamic modeling and advanced control of post-combustion CO2 capture plants. Chemical Engineering Research and Design, 131 (2018):430-439.
• Fernando V. Lima, Xin He, Rishi Amrit and Prodromos Daoutidis. Advanced control strategies for IGCC plants with membrane reactors for CO2 capture. In Process systems and materials for CO2 capture: modelling, design, control and integration, A.I. Papadopoulos and P. Seferlis (eds.), Wiley, 2017.
• Zhaofeng Xu, Xin He, Yali Xue, and Zheng Li. Dynamic simulation of post-combustion capture system. Energy Procedia 37 (2013): 2164-2171.

Conference Presentations (selected)

• Xin He, Dingding Yao and Chi-Hwa Wang. Carbon Footprint of Plastic and Sludge Waste Streams in Singapore. 8^th International Conference on Sustainable Solid Waste Management, Thessaloniki, Greece, June 2021.
• Xin He, Hailin Tian, Yen-Wah Tong and Chi-Hwa Wang. Life-cycle greenhouse gas emission analysis for integrated sewage sludge and food waste management strategy. In proceeding of the 12th International Conference on Applied Energy (ICAE 2020), December 2020.
• Xin He, Zhiyi Yao and Chi-Hwa Wang. Optimal Design and Operation of Biomass Waste Gasification for Energy and Biochar Production. AIChE Annual Meeting, Orlando, FL, November 2019
• Xin He and Fernando V. Lima. A modified SQP method for MPC of a supercritical pulverized coal-fired power plant during cycling. AIChE Annual Meeting, Pittsburgh, PA, November 2018.
• Xin He and Fernando V. Lima. Design and implementation of model predictive control strategies for IGCC power plant cycling with carbon capture. AIChE Annual Meeting, Minneapolis, MN, November 2017.
• Xin He and Fernando V. Lima. Design and implementation of model predictive control strategies for IGCC power plant cycling with carbon capture. AIChE Annual Meeting, San Francisco, CA, November 2016.
• Xin He, Rishi Amrit, Richard Turton and Fernando V. Lima. Model predictive control of integrated gasification combined cycle power plants with membrane reactors for carbon capture. AIChE Annual Meeting, Salt Lake City, Utah, November 2015.

Education

Ph.D, Chemical & Biomolecular Engineering, National University of Singapore, Singapore, 2013-2018.

B.Eng., Mechanical Engineering, Shanghai Jiao Tong University, China, 2009-2013.

Research Interests

Numerical simulation and experimental study on fixed-bed downdraft gasifier;

Anaerobic digestion and gasification hybrid system for potential energy recovery from yard waste and woody biomass;

Monitoring and characterization of particulate emission from the gasification and pyrolysis of biomass;

Reutilization of carbon black waste.

Spin-off Company of NUS: https://www.cbeecosolutions.com/

Research highlights

Ø  Numerical simulation and experimental study on fixed-bed downdraft gasifier for syngas and biochar co-production

·         The gasification model has the capacity to predict the production rate and quality of both syngas and biochar. ·         Economic evaluation was conducted taking into account economic value of produced syngas and biochar. ·         A three-region approach was applied to simulate heat and mass transfer inside the reactor based on different gas velocity profiles. ·         Several factors were investigated for evaluation of gasification performance, including the moisture content of feed stock, equivalence ratio, and air inlet location.

Ø  Anaerobic digestion and gasification hybrid system for potential energy recovery from yard waste and woody biomass

·         The feasibility of the proposed two-stage hybrid system was validated experimentally and numerically. ·         The proposed hybrid system could effectively improve the quality of produced gas. ·         The operating parameters were optimized to improve the overall energy efficiency of the system. ·         Drying process was found to play an important role in determining overall energy efficiency. ·         Optimal moisture content of AD residue was investigated for maximizing energy efficiency.

Ø  Particulate Emission from the Gasification and Pyrolysis of biomass: Concentration, Size Distributions, Respiratory Deposition-based Control Measure Evaluation

·         PM emissions of gasification and pyrolysis are compared. ·         The particles emitted from gasification and pyrolysis are mainly PM0.25-1.0 and PM1.0-2.5 ·         Particle respiratory deposition modelling shows that most particles penetrate deeply into the last stage of the human respiratory system ·         A particle respiratory deposition-based cyclone design scheme is proposed. ·         The cyclone vortex finder diameter is the most sensitive design parameter.

Patent:

 Wang CH (30%*), Babu CM (30%*), Yao Z(30%*),  Anbu MT (10%*). A Cost-effective Way of Converting Low-grade Carbon to Activated Carbon for Environmental Applications. SG Non-Provisional Application No. 10202003008X (* contribution percentage)

Journal publications:

1. Hu, X. He, Z. Yao, Y. Dai, C.H. Wang, “Gaseous production kinetics and solid structure analysis during isothermal conversion of biomass pellet under different atmospheres”, Journal of Energy Institute, in press (2021).
2. Yao Z, He X, Hu Q, Cheng W, Yang H, & Wang CH. A Hybrid Peripheral Fragmentation and Shrinking-core Model for Fixed-bed Biomass Gasification. Chemical Engineering Journal, 2020: 124940.

3. Yao Z, You S, Dai Y, Wang CH. Particulate emission from the gasification and pyrolysis of biomass: Concentration, size distributions, respiratory deposition-based control measure evaluation. Environmental pollution. 2018 Nov 1;242:1108-18.

4. Yao Z, You S, Ge T, Wang CH. Biomass gasification for syngas and biochar co-production: Energy application and economic evaluation. Applied Energy. 2018 Jan 1;209:43-55.

5. Yao Z, Li W, Kan X, Dai Y, Tong YW, Wang CH. Anaerobic digestion and gasification hybrid system for potential energy recovery from yard waste and woody biomass. Energy. 2017 Apr 1;124:133-45.

6. You S^†, Yao Z^†, Dai Y, Wang CH. A comparison of PM exposure related to emission hotspots in a hot and humid urban environment: Concentrations, compositions, respiratory deposition, and potential health risks. Science of the Total Environment. 2017 Dec 1;599:464-73. († Authors contribute equally to this work.)

7. Zhan G^†, Yao Z^†, Ng WC, Li H, Lim MX, Zhi Y, Koh SN, Wang CH. Economic Production of Monoclinic Bismuth Vanadate from Waste Vanadium Ions: Process Design and Cost-Benefit Analysis. Journal of Cleaner Production. 2019 Dec 10;240:118188. († Authors contribute equally to this work.)

8. Li L, Yao Z, You S, Wang CH, Chong C, Wang X. Optimal design of negative emission hybrid renewable energy systems with biochar production. Applied Energy. 2019 Jun 1;243:233-49.

9. Tong H, Yao Z, Lim JW, Mao L, Zhang J, Ge TS, Peng YH, Wang CH, Tong YW. Harvest green energy through energy recovery from waste: A technology review and an assessment of Singapore. Renewable and Sustainable Energy Reviews. 2018 Dec 1;98:163-78.

10. Ramachandran S, Yao Z, You S, Massier T, Stimming U, Wang CH. Life cycle assessment of a sewage sludge and woody biomass co-gasification system. Energy. 2017 Oct 15;137:369-76.

11. Kan X, Yao Z, Zhang J, Tong YW, Yang W, Dai Y, Wang CH. Energy performance of an integrated bio-and-thermal hybrid system for lignocellulosic biomass waste treatment. Bioresource technology. 2017 Mar 1;228:77-88.

12. Shen Y, Li X, Yao Z, Cui X, Wang CH. CO2 gasification of woody biomass: Experimental study from a lab-scale reactor to a small-scale autothermal gasifier. Energy. 2019 Mar 1;170:497-506.

13. Cui X, Li H, Yao Z, Shen Y, He Z, Yang X, Ng HY, Wang CH. Removal of nitrate and phosphate by chitosan composited beads derived from crude oil refinery waste: Sorption and cost-benefit analysis. Journal of Cleaner Production. 2019 Jan 10;207:846-56.

14. Ong Z, Cheng Y, Maneerung T, Yao Z, Tong YW, Wang CH, Dai Y. Co‐gasification of woody biomass and sewage sludge in a fixed‐bed downdraft gasifier. AIChE Journal. 2015 Aug;61(8):2508-21.

Conference Publications/ Presentations:

1. Yao, Z., Prabhakar AK., Babu CM., Wang C. H.. Treatment and Utilization of Solid Residues from Waste Combustion Facilities and Carbon Black Waste for a Sustainable Environment. PRES’19, 20 – 23 October, Agios Nikolaos, Crete, Greece.

2. Yao, Z., Uzi, A., Ge T.S., Wang C. H.. Multi-Scale Modelling of Biomass Gasification: The Effects of Intraparticle Transfer on Syngas and Biochar Production. AIChE Annual Meeting, Pittsburgh, Pennsylvania, USA, 28 October-02 November 2018.

3. Yao, Z., Li, H., Koh, S. N., Wang C. H.. Experimental Investigation and Process Design for the Conversion of Carbon Black Waste into Valuable Resources. AIChE Annual Meeting, Pittsburgh, Pennsylvania, USA, 28 October-02 November 2018.

4. Yao, Z., You, S., Yan W.C., Dai Y., Tong, Y. W., Wang C. H.. Biomass gasification in a fixed bed downdraft gasifier: experimental study & comprehensive reactor and particle modelling. AIChE Annual Meeting, San Francisco, California, USA, 13-18 November 2016.

5. Yao, Z., Li, W., Kan, X., Dai, Y., Tong, Y. W., Wang, C. H.. Experimental and numerical study on combining anaerobic digestion and gasification for potential energy recovery from biomass and sewage sludge. AIChE Annual Meeting, San Francisco, California, USA, 13-18 November 2016.

6. Yao, Z., Li, W., Kan, X., Dai, Y., Tong, Y. W., and Wang, C. H.. Experimental and numerical study on combining anaerobic digestion and gasification for potential energy recovery from biomass and sewage sludge. 15th International Conference on Sustainable Energy Technologies (SET2016), Singapore, 20-22 July 2016.

7. Kan, X., Yao, Z., Zhang, J., Tong Y. W., and Wang, C. H.. Energy performance of a two-stage treatment for waste lignocellulosic biomass: Effects of organic loading rate, hydraulic residence time and carrier gas. 15th International Conference on Sustainable Energy Technologies (SET2016), Singapore, 20-22 July 2016.

CURRENT WEBSITE (https://faculty.hzau.edu.cn/yaodingding/zh_CN/index.htm)

Education

Ph.D, State Key Laboratory of Coal Combustion, Huazhong University of Science and Technology, 2014-2018.

Research Interests

Thermo-chemical processing of plastic/biomass with nano-catalyst

Hydrogen and carbon nanomaterials production from catalytic pyrolysis of waste plastics

Research highlights

Waste to Energy – H2-enrich syngas and liquid chemicals can be produced from plastic waste using pyrolysis and reforming process

Waste to Resource – Carbon nanomaterials production from high C-containing resources from catalytic thermal cracking of waste resources

Resource Utilization– carbon materials from waste plastic for several applications including waste water treatment; electrochemical materials

Publications

1. Yao, H. Li, Y. Dai, C.H. Wang, “Impact of temperature on the activity of Fe-Ni catalysts for pyrolysis and decomposition processing of plastic waste”, Chem. Eng. J., 408, 127268 (2021).
2. Dingding Yao and Chi-Hwa Wang. “Pyrolysis and in-line catalytic decomposition of polypropylene to carbon nanomaterials and hydrogen over Fe-and Ni-based catalysts.” Applied Energy. 2020, 265:114819.

Conference Presentations

Dingding Yao and Chi-Hwa Wang. Thermal chemical recycling of waste plastics for valuable products. Sustainable Waste Management Workshop. 7-9 January 2020. Singapore. (Invited talk)

 Personal Website

Education

Ph.D. (Power Engineering and Engineering Thermo-physics), Shanghai Jiao Tong University, China, 2015

M.Eng. (Mechanical Engineering), Hohai University, China, 2010

B.Eng. (Thermal Power Engineering), Hohai University, China, 2007

Research Interests

• Optical and thermal engineering sciences applied in solar energy conversion
• Enhancement of solar-to-thermal conversion employed advanced solar optics and heat/mass transfer
• Highly efficient solar cooling and heating for low-carbon/net-zero-energy buildings
• Solar fuel converted from carbonaceous feedstock (solid waste), water and carbon dioxide

Research highlights

• Energy and Fuels from Sunlight, Solid Waste, CO₂ and H₂O

A solar-and-biomass bi-source nexus is introduced to provide a promising and sustainable approach for the synthetics of cogeneration of electrical power, fuels and cooling & heating. Biomass/waste as a promising carbonaceous feedstock could be an appropriate candidate due to its combustible form stored high-energy density.

Solar gasification uses highly concentrated solar radiation as source of high-temperature process heat to drive gasification processes. In general, improving the heat value of the product syngas, the steam/CO₂ mixture serves as the gasification agent of carbonaceous feedstock. Thus, solar energy in an amount equal to the enthalpy change of the endothermic reactions. Conversion performance of thermochemical gasification of solid waste can be significantly improved, accompanied by solar energy stored as a fuel carrier.

• Solar Fuel Laboratory at E2S2-CREATE Program

Publications (Selected)

• Li X, Lin M, Dai YJ^*, Wang CH. Comparison-based optical assessment of hyperboloid and ellipsoid reflectors in a beam-down solar tower system with linear Fresnel heliostats. Journal of Solar Energy Engineering (ASME). 2017;139(6):061003.
• Li X, Shen Y, Kan X, Hardiman TK, Dai Y, Wang CH^*. Thermodynamic assessment of a solar/autothermal hybrid gasification CCHP system with an indirectly radiative reactor. Energy. 2018;142:201–14.
• Li X, Kan X, Sun X, Zhao Y, Ge T, Dai Y, Wang CH^*. Performance analysis of a biomass gasification-based CCHP system integrated with variable-effect LiBr-H₂O absorption cooling and desiccant dehumidification. Energy. 2019;176:961-79.
• Li X, Lin A, Young CH, Dai Y, Wang CH^*. Energetic and economic evaluation of hybrid solar energy systems in a residential net-zero energy building. Applied Energy. 2019;254:113709.
• Li X^*, Wang CH^*. 2017 P.V. Danckwerts Memorial Lecture Special Issue Editorial: Advances in Emerging Technologies of Chemical Engineering towards Sustainable Energy and Environment: Solar and Biomass. Chemical Engineering Science. 2019:115384. (Guest Editor)
• Li X, Shen Y, Wei L, He C, Lapkin AA, Lipiński W, Dai Y, Wang CH^*. Hydrogen production of solar-driven steam gasification of sewage sludge in an indirectly irradiated fluidized-bed reactor. Applied Energy. 2019;261: 114229.
• Li X, Kan X, Sun X, Zhao Y, Ge T, Dai Y, Wang CH^*. Performance analysis of a biomass gasification based CCHP system with variable-effect LiBr-H2O absorption cooling and desiccant dehumidification. Energy Procedia. 2019 Feb 1;158:4729-34.
• Maneerung T¹, Li X¹, Li C, Dai Y, Wang CH^*. Integrated downdraft gasification with power generation system and gasification bottom ash reutilization for clean waste-to-energy and resource recovery system. Journal of Cleaner Production. 2018;188:69–79. (Co-first author)
• Shen Y, Li X, Yao Z, Cui X, Wang CH^*. CO₂ gasification of woody biomass: Experimental study from a lab-scale reactor to a small-scale autothermal gasifier. Energy. 2019;170:497-506.
• Li L, Li X, Chong C, Wang CH, Wang X. A decision support framework for the design and operation of sustainable urban farming systems. Journal of Cleaner Production. 2020;268:121928.
• Wei L, Li X, Yang W, Dai Y, Wang CH. Optimization of operation strategies of a syngas-fueled engine in a distributed gasifier-generator system driven by horticulture waste. Energy Conversion and Management. 2020;208:112580.
• Kan X, Wei L, Li X, Li H, Zhou D, Yang W, et al. Effects of the three dual-fuel strategies on performance and emissions of a biodiesel engine. Applied Energy. 2020;262:114542.
• J. Chen, X. Li, Y. Dai, C.H. Wang^{, “}Energetic, economic, and environmental assessment of a Stirling engine based gasification CCHP system”, Applied Energy, 281, 116067 (2021).
• X. Li, J. Chen, W. Lipinsky, Y. Dai, C.H. Wang “A 28 kWe multi-source high-flux solar simulator: Design, characterization, and modeling”, Solar Energy, 211, 569-583 (2020).
• X.Y. Sun, J.L. Chen, Y. Zhao, X. Li, T.S. Ge, C.H. Wang, Y.J. Dai, “Experimental investigation on a dehumidification unit with heat recovery using desiccant coated heat exchanger in waste to energy system”, Applied Thermal Engineering, 185, 116342 (2021).
• X. Li, J. Chen, X. Sun, Y. Zhao, C. Chong, Y. Dai, C.H. Wang^, “Multi-criteria decision making of biomass gasification-based cogeneration systems with heat storage and solid dehumidification of desiccant coated heat exchangers”, Energy 233, 121122 (2021).
• Arora, J. Jung, M. Liu, X. Li, A. Goel, J. Chen, S. Song, C. Anderson, D. Chen, K. Leong, S. H. Lim, S. L. Fong, S. Ghosh, A. Lin, H.W. Kua, H.T.W. Tan, Y. Dai, C.H. Wang, “Gasification biochar from horticultural waste: An exemplar of the circular economy in Singapore”, Science of the Total Environment 781, 146573 (2021).
• Wang CH^*, Tong YW^*, Loh KC^*, Wang RZ^*, Li X^*, Advanced technologies on sustainable energy and environment: SET2016 virtual special issue. Energy. 2017;137:350–2. (Guest Editor)

Conference Publications/ Presentations (selected)

• Li X, Shen Y, Lipiński W, Dai Y, Wang CH^*. Gasification of Organic Solid Waste Under High-Flux Solar Irradiation: Thermodynamics, Kinetics, and Fixed-Bed Reactor Evaluation. 2019 AIChE Annual Meeting. Hyatt Regency, Orlando, USA, November 10-15, 2019.
• Li X^*, Dai, Y, Wang CH. Waste-to-energy systems towards energetic and environmental sustainability. International Young Scholar’s Symposium of Fuzhou University Green Petrochemical Engineering Innovation Center. Fuzhou, China, 31 Dec 2018. (Invited Speaker)
• Li X, Kan X, Sun X, Zhao Y, Ge T, Dai Y, Wang CH^*. Performance analysis of a biomass gasification based CCHP system with variable-effect LiBr-H₂O absorption cooling and desiccant dehumidification. ICAE2018. Hong Kong, China, 22–25 August 2018.
• Li X^*, Shen Y, Kan X, Dai Y, Wang CH. Potential Evaluation of a Solar/autothermal Hybrid Gasification based Tri-generation System in Singapore. 2018 AIChE Singapore Local Section Annual Conference. Singapore, 18 May 2018. (Invited Speaker)
• Li X^*, He C, Shen Y, Dai Y, Wang CH. Syngas Production from Sewage Sludge By Solar-Driven CO₂ 2017 AIChE Annual Meeting. Minneapolis, MN, USA, Oct. 29–Nov. 3, 2017.

Video Presentation