报告时间：2026年5月28日 下午3点
报告地点：宁波大学北区1号实验楼227会议室
报告人：尚进
报告人简介：
Prof. Jin Shang is a tenured Associate Professor in the School of Energy and Environment at City University of Hong Kong, where he leads the Adsorption Separation Lab. His research focuses on adsorption-based gas separation, spanning carbon capture and removal, natural gas purification, and toxic gas extraction. He discovered the molecular trapdoor mechanism, the fourth recognized adsorption-based separation method, achieving record CO2 selectivity. Prof. Shang has received the 2024 Carbon Capture Award for Excellent Research and the 2022 ISTP-Bogen Young Scientist Award, among others. With 150+ publications, 9,600+ citations, and an h-index of 56, he ranks among Stanford’s top 2% most-cited scientists.
报告摘要：
Chemical separations account for 10-15% of the world’s total energy consumption. Adsorption-based separation offers a more energy-efficient alternative to traditional distillation, avoiding phase changes and operating under milder conditions. Among adsorption mechanisms, molecular sieving is renowned for its precision, selectively admitting molecules smaller than the adsorbent’s pore size. However, conventional molecular sieving struggles when gas molecules have minimal size differences.
To address this, we discovered the molecular trapdoor mechanism, a paradigm shift in non-size-based molecular sieving. Rather than relying solely on molecular size, the molecular trapdoor mechanism leverages interaction strength between gas molecules and pore-keeping groups in the adsorbent. This innovative approach selectively admits gases with stronger interactions, allowing them to open the "trapdoor" and be adsorbed, while excluding weaker-interacting molecules. The result is exceptional selectivity, enabling challenging gas separations beyond the reach of traditional sieving methods.
In this talk, I will begin by sharing the journey that led to the discovery of the molecular trapdoor mechanism, followed by the development of various trapdoor adsorbents for a range of applications. I will then highlight our latest advancements in leveraging the molecular trapdoor mechanism for counterintuitive sieving in both same-size and size-inverse gas separations. Specifically, we designed an LTA trapdoor zeolite capable of size-inverse molecular sieving, achieving exceptional selectivity and uptake for Xe. By fine-tuning the door-keeping cations, we demonstrated an invertible sieving-level separation of Xe and Kr, allowing for the exclusive adsorption of either Xe over Kr or vice versa—an achievement of significant scientific importance. Furthermore, we developed flexible zeolite-based molecular trapdoor adsorbents that enable same-size sieving of CO₂ over C₂H₂, leveraging a novel strategy for regulating trapdoor behavior based on differences in adsorption configuration.
These findings underscore the transformative potential of molecular trapdoor zeolites in gas adsorption and separation technologies, paving the way for innovative solutions to longstanding challenges in chemical separations.
欢迎广大师生踊跃参加！
