4月21日美国工程院士w.s. winston ho 教授学术讲座-亚博88体育

讲座名称: new amine-based membranes for co₂capture

讲座时间:2018年4月21日（星期六），上午10:00

讲座地点: 化工学院办公楼106室

讲座人: w.s. winston ho 院士，美国俄亥俄州立大学

w. s. winston ho (何文寿)，美国工程院院士，中央研究院院士，俄亥俄州立大学材料科学与工程学院和化学与生物分子工程学院（双聘）教授，拥有50年膜材料及分离过程研发经验，曾任xerox公司、美国exxon石油公司研发部、commodoresetion technologies技术副总裁，主编出版《membrane handbook》等。主要研究领域包括分子级膜分离材料（反渗透膜、co₂分离膜）、液膜、燃料电池隔膜、水纯化、伴随化学反应的分离以及膜传递现象，拥有50多项美国专利。

曾获荣誉：

2002年当选为美国国家工程院院士

1985年获“美国工业研究100杰出成就奖”

1991年获“新泽西发明大会及名人堂年度发明家奖”

1993年获“最杰出工程专业与学术出版奖章”

2006年获美国化工协会颁发的“institute award for excellence in industrial gases technology”

讲座内容：

this presentation covers new advances in amine-containing membranes for co₂capture from flue gas in coal- and/or natural gas-fired power plants and from <1% co₂concentration sources, e.g., the residual flue gas after the primary co₂capture system and coal-mine gas streams. the post-combustion carbon capture from flue gas requires a high co₂/n₂selectivity of 140 along with a very high co₂permeance of about 700 gpu (1 gpu = 10^-6cm³(stp)/(cm²žsžcmhg)) or higher in order to use a stand-alone membrane process. we have synthesized new membranes, showing a high co₂/n₂selectivity of >140 and a high co₂permeance of >1000 gpu. the membrane was scaled up to 14 inches in width using continuous roll-to-roll fabrication. aided by a material balance equation, three variables, namely the coating-knife gap setting, web speed, and coating solution concentration, were identified as the critical factors to control the membrane selective layer thickness. this resulted in the membrane with a selective layer of <200 nm. the scale-up membrane exhibited similar performance compared to the lab-size membrane. the scale-up membrane was fabricated into spiral-wound membrane modules for testing with simulated flue gas containing about 20% co₂, 77% n₂, 3% o₂and 1 – 3 ppm, showing similar results as the flat-sheet membrane tested in the lab. techno-economic analysis has shown that the post-combustion capture process using the membrane is promising for meeting doe’s capture cost target set for 2025. for carbon capture from <1% co₂concentration sources, we have elucidated the carrier saturation phenomenon. with reducing the co₂concentration in the feed gas, both co₂permeance and co₂/n₂selectivity increased. these were mainly due to more available amine carriers for co₂molecular transport at lower co₂concentration conditions. in addition, the stability and scale-up of membrane modules will be discussed.