- Conducted comparative techno-economic and life cycle assessment of conventional NG-based, carbon capture-based, and low-carbon hydrogen-based ammonia production by developing engineering process models using Aspen Plus.- Investigated regional opportunities for green ammonia production in the U.S by identifying resource availability, infrastructures, and market demands.

- Designed industrial processes and supply networks of green urea production in a watershed with consideration of economic resource constraints, by developing an integrated modeling framework of process design, life cycle assessment, and technology choice models.- Designed industrial processes and supply networks to be adaptable and resilient to future climate disturbances using climate and hydrological models.- Explored sustainable watershed management strategies with various technological and agro-ecological options by investigating the interactions between food-energy-water systems and ecosystems.- Investigated the economic feasibility and environmental benefits of various CO2 conversion technologies in improving the sustainability of food-energy-water systems.- Developed a multiscale and multi-regional modeling framework for spatially-explicit absolute life cycle assessment that accounts for regional heterogeneity and ecological carrying capacity.- Assessed life cycle CO2 emissions of jet fuel production from coal liquefaction and hydrotreating processes.- Conducted life cycle assessment of emerging carbon fixation technologies with RubisCO enzyme immobilization.- Assessed food-energy-water footprints of household consumption in Columbus, Ohio and their correlation with demographics.- Conducted urban sustainability assessment of agri-food production and consumption in Hennepin County, Minnesota.- Assessed carbon footprint of the solar panel facility in the Columbus Zoo parking lot.

- Assisted to develop technologies for metal-coated carbon fibers for electromagnetic interference shielding in collaboration with the Korea Institute of Carbon Convergence Technology (KCTECH).

- Conducted research on developing electrochromic thin-film electrodes, large-scale electrochromic windows, and solar-chargeable smart window systems.- Assisted to develop heteroatom-doped carbons as anode materials for lithium-ion batteries and capacitors.

- Performed research on synthesizing various metal catalysts and carbon nanotubes by combustion synthesis, chemical vapor deposition, and chemical functionalization processes for applications such as lithium-ion batteries, electron field emitters, and electrical/thermal conductive composites.- Assisted to develop technologies for mass production and commercialization of multi-walled carbon nanotubes.

- Conducted research on fabricating FePt magnetic nanorods sputter-deposited on a polycrystalline TiN underlayer by controlling the crystallinity and grain size of the nanorods for a high-density magnetic storage medium.- Assisted to fabricate porous silicon films as anode materials for lithium-ion batteries.

- Examined the synergistic effect of various cellulases on the degradation of cellulose to glucose for bioethanol fermentation.