Our People

Lip Siang earned his Master's in Engineering (by research) from Swinburne University of Technology Sarawak Campus, Malaysia, in August 2023. He also holds a Bachelor's in Mechanical Engineering from the same university, awarded in August 2020. His master's research focused on the circular economy, specifically waste lubricant re-refining and biorefinery pathways. He specializes in applying mathematical optimization to complex decision-making problems related to process integration pathways and supply chain network design.

Currently, Lip Siang is a Research Associate at the Energy Studies Institute (ESI) at the National University of Singapore (NUS), where he focuses on hydrogen economy strategy. Before joining ESI in February 2025, he was a Research Engineer at the NUS Environmental Research Institute (NERI). At NERI, he contributed to atmospheric simulation research for the urban environment of Singapore, a government project funded by the National Environment Agency (NEA).

Google Scholar Profile: https://scholar.google.com/citations?user=ICnfJrwAAAAJ&hl=en

- Mathematical optimization for process and supply-chain design

- Circular economy and waste management

- Biorefinery and bio-based processes

- Atmospheric modelling and environmental science

- Hydrogen economy and energy systems

1. Yeo, L. S., Hie, J. Y. C., Andiappan, V., & How, B. S. (2024). Navigating Waste Oil Re-refinery Paths with Consideration of Uncertainty: A Sequential Optimization Approach. Process Integration and Optimization for Sustainability, 2011. https://doi.org/10.1007/s41660-024-00424-4
2. Yeo, L. S., Bong, Z. R., Kong, K. G. H., Ginjom, I. R. H., Teng, S. Y., & How, B. S. (2023). Application-Driven Honey Selection via Principal Component Analysis-Aided Optimisation. Chemical Engineering Transactions, 103, 217–222. https://doi.org/10.3303/CET23103037
3. Yeo, L. S., Tiang, C. W. P., Teng, S. Y., Ng, W. P. Q., Lim, C. H., Leong, W. D., Lam, H. L., Sunarso, J., & How, B. S. (2023). Rethinking circularity with Re-refineries and supply chains reintegration via multi-objective pareto graph theoretical approach. Energy, 279, 127814. https://doi.org/10.1016/j.energy.2023.127814
4. Yeo, L. S., Ng, W. P. Q., Lim, C. H., Leong, W. D., Lam, H. L., Wong, Y. C., Sunarso, J., Teng, S. Y., & How, B. S. (2023). Circular Synergy between Biomass and Petroleum Industry in Process and Supply Chain Integration. ACS Sustainable Chemistry & Engineering, 11(35), 12916–12933. https://doi.org/10.1021/acssuschemeng.3c01778
5. Yeo, L. S., Teng, S. Y., Ng, W. P. Q., Lim, C. H., Leong, W. D., Lam, H. L., Wong, Y. C., Sunarso, J., & How, B. S. (2022). Sequential optimization of process and supply chains considering re-refineries for oil and gas circularity. Applied Energy. https://doi.org/10.1016/j.apenergy.2022.119485

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