第129回GMSI公開セミナー 講演者:Prof. Wei Fan (Assistant Professor, Department of Chemical Engineering, University of Massachusetts Amherst) 担当:化学システム工学専攻 教授 大久保 達也
2013.01.15
工学部5号館5F 第3輪講室
Prof. Wei Fan
Assistant Professor, Department of Chemical Engineering,
University of Massachusetts Amherst
題目:Hydrothermal Synthesis of Zeolites with
Three-Dimensionally Ordered Mesoporous-Imprinted Structure
内容の概要説明:
Due to their ordered micropore structures and acid strength, zeolites are extensively used as heterogeneous acid catalysts in oil refinery and petrochemical
processes. However, their micropore structures and high intrinsic activities frequently make these materials subject to diffusion limitations that restrict
reactant accessibility to the active sites on the interior surfaces of zeolites and inhibit the full utilization of zeolite catalysts. Nanofabrication of
hierarchical zeolite catalysts with mesoporosity is a proven strategy for integrating shape selectivity provided by the intrinsic micropore structures and
efficient mass transport facilitated by the mesopore structures.
In this talk, I will demonstrate how a wide range of zeolite morphologies can be realized through the confined growth of zeolites within 3-dimensionally
ordered mesoporous (3DOm) carbon. A wide range of zeolites with ordered mesoporosity have been synthesized within the 3DOm carbon template by steam assisted
crystallization method or conventional hydrothermal treatment. The approach exhibits versatile abilities for controlling the mesoporosity of hierarchical
zeolites from 5 nm to 15 nm. The mass transport in the hierarchical zeolites has been significantly improved, which can mostly be attributed to the shortened
diffusion path length in the micropores. The catalytic performance of the hierarchical zeolite catalysts for the reactions of bulky chemicals and biomass
conversion will be discussed in this talk too.
日時:2013年1月15日(火) 15:00-16:20
場所:東京大学工学部5号館5F 第3輪講室
添付ファイル: 第129回公開セミナー.pdf