WAN Lisha^1,2,LI Fei^1,2,ZHAO Shenyuan²,ZHANG Jianhui²,WANG Yuqi¹,WANG Yujun²

(1.School of Chemical Engineering,Northwest University,Xi’an 710069,China;2.State Key Laboratory of Chemical Engineering,Tsinghua University,Beijing 100084,China)

Abstract：Kilogram-scale test for preparation of fibrous γ-Al2O3 in membrane microreactor with co-precipitation method was carried out by using NaAlO2 as the dispersed phase and Al2(SO4)3 as the continuous phase.The effects of different membrane dispersion microreactor size,NaAlO2 flow rate,Al2(SO4)3 mass concentration,reaction time,aging time,washing method and drying temperature on the properties of γ-Al2O3 were studied.The properties and microstructure of γ-Al2O3 were characterized by TEM and XRD to verify the effectiveness of the amplification test.The results show that the optimum parameters of kilogram-scale amplification process are as follows:the radius and height of membrane dispersion microreactor are 8 mm,flow rate of NaAlO2 is 36 L/h,mass concentration of Al2(SO4)3 is 30 g/L,reaction time is 1 h,aging time is from 0 to 1 h,washing method is sodium carbonate-phosphoric acid washing method and drying temperature is 120 ℃.The pore volume of prepared γ-Al2O3 is 1.40 mL/g,average pore diameter is 13.1 nm and specific surface area is up to 429.9 m2/g.

Keywords：membrane dispersion microreactor; γ-Al2O3; scale-up test

中图分类号：TQ133.1

文献标志码：A

文章编号：1008-5548(2021)01-0022-10

DOI：10.13732/j.issn.1008-5548.2021.01.003

收稿日期：2020-08-12，修回日期：2020-10-08，在线出版时间：2020-11-02 10:31。

基金项目：国家重点研发计划项目,编号:2019YFA0905100;国家自然科学基金项目,编号:21878169,21991102;清华大学自主科研计划项目,编号:2018Z05JZY010。

第一作者简介：万莉莎(1995—),女,硕士研究生,研究方向为膜分散微反应器制备纳米材料。E-mail:785064909@qq.com。

通信作者简介：

王玉琪(1974—),男,博士,教授,博士生导师,研究方向为材料与能源化工、分离技术与反应工程。E-mail:wangyuqi@nwu.edu.cn。

王玉军(1973—),男,博士,教授,博士生导师,研究方向为膜分离及膜反应分离一体化技术、高效分离材料制备。E-mail:wangyujun@mail.tsinghua.edu.cn。