海外英才分论坛学术报告【Diamine solutions based carbon capture & Ru based electrocatalysts for nitrogen reduction】

时  间：2019年5月14日11:30-12:15

地  点：仓山校区环境学院大楼二楼多媒体教室

主  讲：澳大利亚纽卡斯尔大学  余兵  博士

主  办：环境科学与工程学院

专家简介：余兵, 男，澳大利亚纽卡斯尔大学与澳大利亚联邦科学与工业组织能源中心联培博士。主要研究方向包括：微生物技术及纳米铁系材料合成用于有机废水处理；有机胺法用于工业烟气CO₂捕集；固废材料用于CO₂矿化封存；单原子贵金属材料合成用于电催化氮还原。在Applied Energy, Environmental Science& Technology, Chemical Engineering Journal, Fuel Processing Technology, Chemosphere, ACS Sustainable Chemistry & Engineering等期刊发表SCI论文19篇，其中以第一作者6篇，担任Chemical Communications和AIChE等期刊审稿人。曾获International symposium on clean energy and advanced materials 2018 “Best paper award”。

报告摘要：Aqueous monoamine solvents have been extensively studied for the purpose of CO₂ absorption to reduce emissions from sources such as industrial power stations. However, to improve the economic viability of carbon capture technologies, solvents with higher CO₂absorption capacity and faster kinetics are urgently required. Diamines comprising two amino groups have potentially higher CO₂ absorption capacity and rates than monoamine solvents, such as monoethanolamine, and could be superior liquid absorbents for CO₂ absorption. Under the conditions studied, all selected diamines had an absorption capacity of more than 0.78 moles of CO₂ per mole of amine, which far outstrips the capacity of monoamines. The hydroxyl group decreased the rate of CO₂ absorption, while the methyl group and longer chain lengths increased CO₂ absorption rate and capacity; the tertiary amino group exhibited the lowest kinetic performance. Our research provides a method for the future selection and design of new diamines for post-combustion CO₂ capture. In addition, we reported the determination of the kinetic and equilibrium constants for a diamine via stopped-flow spectrophotometric and ¹H/¹³C NMR titrations, and gained a thorough understanding of underlying mechanism of CO₂ absorption into diamine solutions. Finally, we developed a new integrated absorption and mineralization (IAM) process that couples a diamine based CO₂ absorption with fly ash triggered amine regeneration, which exhibited a high energy-saving potential for diamine solutions based carbon capture applications.