为庆祝交通大学建校120周年暨迁校60周年，应化工学院邀请，香港科技大学胡喜军教授将于2016年4月13日-16日来访。胡喜军教授是国际知名的环境催化学家和吸附专家。1982年毕业于华南理工大学化工系，1993年在澳大利亚昆士兰大学获得工学博士学位。现为香港科技大学化工系教授，国际吸附学会理事(director of international adsorption society),国际刊物《international journal of chemical engineering》编委、《asia pacific journal of chemical engineering》副主编。曾担任第三届亚太可持续发展与能源技术国际学术会议技术委员会主席，第17届化学反应工程国际学术会议组委会秘书长，出版了专著《sustainable energy and environmental technologies》。
主要研究领域：气体分离、吸附与催化用于空气污染控制与废水处理、纳米多孔结构材料合成与应用、化学反应工程的数学模型与计算机模拟等。先后在environmental science & technology、langmuir、chemical communications、aiche journal、chemical engineering science、acs nano、applied catalysis b: environmental、carbon等国际刊物发表论文130余篇。
a catalytic architecture of nanosized titanium silicalite-1 supported on clay for oxime synthesis
报告2：a catalytic architecture of nanosized titanium silicalite-1 supported on clay for oxime synthesis
professor xijun hu
department of chemical and biomolecular engineering
hong kong university of science and technology
clear water bay, kowloon, hong kong
email:; fax: (852) 2358 0054; tel: (852) 2358 7134
a titanium silicalite-1 (ts-1) composite supported on clay was developed for industrial ammoximation process. the synthesis, catalytic activity and reaction model were studied thoroughly for the cyclohexanone ammoximation. it was found that submicron ts-1 could be formed on and between the clay structures by hydrothermal treatment which mimics the layered morphology of the clay. no agglomeration of ts-1 was observed in the clay-based composite after reuse, therefore the catalyst was proven to be durable. it was found that the presence of clay facilitated rapid crystallization of ts-1. fourier transfom infrared (ft-ir) study showed that the si defective sites were the exact location at which ti was bonded. as a result, it was concluded that the formation of ts-1 on the bentonite clay was initiated by the prior formation of silicalite-1 structure, which is then followed by ti incorporation. the preparation condition of the composite was optimized in terms of characteristics necessary for selective oxime synthesis. the catalytic composite is much superior to the ordinary ts-1 in terms of durability as it showed 90% cyclohexanone conversion and 84% selectivity in repeated reaction cycles. in addition, the composite also demonstrated improved settling ability compared with unsupported ts-1.
the intrinsic kinetics of the cyclohexanone ammoximation over the clay-based ts-1 composite was found to follow the eley-rideal mechanism according to the reaction model developed. the model results were in good agreement with the experimental data. with the reaction kinetics being formulated, together with the calculated activation energy and preexponential factor, this study provided a guideline for industrial design and showed conclusively that the clay-based ts-1 composite is applicable.