题目：Concentrated Solar-thermal Co-production of Hydrogen and Graphitic Carbon: Analysis Via Infrared Laser Absorption
时间：2025年11月21日 13:30-14:30
地点：机械与动力工程学院 F310会议室
邀请人：顾明明 副教授（航空动力研究所）
Biography
Dr. Chuyu Wei is an Assistant Professor of Mechanical Engineering at the University of Hong Kong (HKU). He received his B.Sc. degree in Energy Engineering from Zhejiang University in 2015 and his Ph.D. in Mechanical Engineering from the University of California, Los Angeles in 2020. Prior to joining HKU, he was a Postdoctoral Fellow at Stanford University. Prof. Wei’s research focuses on developing advanced laser-based diagnostics for next-generation energy and propulsion systems. His work integrates fundamental spectroscopy, optomechanical design, and advanced signal processing to create novel sensors for studying reacting flows and energy conversion processes. He has contributed to advances in infrared absorption sensing and imaging, scientific machine learning methods, hydrogen technologies, and the fundamental chemistry of alternative fuels.
Abstract
Contemporary carbon and hydrogen production processes release significant CO2 emissions with negative consequences for the Earth’s climate. In this talk, I will introduce a novel solar-driven thermochemical process in which concentrated simulated-solar radiation is focused onto a porous carbon-felt substrate. Methane flowing through the substrate undergoes rapid pyrolysis, producing primarily hydrogen gas and solid graphitic carbon, with minor residual hydrocarbons. In situ laser-absorption measurements provide quantitative characterization of the gas-phase products, while post-process materials analysis shows that the deposited carbon is highly graphitic and conforms uniformly to the substrate’s micro-porous ligaments. The process exhibits a fast cold-startup time response of approximately 1 min to reach steady-state thermochemical conditions and produces a high-quality microporous graphitic product. The second part of the talk will highlight ongoing research directions, including fundamental shock-tube studies aimed at elucidating the reaction pathways driving methane pyrolysis, as well as advances in laser-absorption sensing techniques for high-fidelity hydrogen detection.
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ENGLISH
地址：上海市东川路800号上海交通大学闵行校区机械与动力工程学院
邮编：200240
Email：sjtume@sjtu.edu.cn