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Recent Advances in Multifunctional Capsule Catalysts in Heterogeneous Catalysis
Xin-hua Gao1, Qing-xiang Ma1, Tian-sheng Zhao1, Jun Bao2, Noritatsu Tsubaki3
1.State Key Laboratory of High-Efficiency Utilization of Coal and Green Chemical Engineering, College of Chemistry & Chemical Engineering, Ningxia University, Yinchuan 750021, China;2.National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei 230029, China;3.Department of Applied Chemistry, School of Engineering, University of Toyama, Gofuku 3190, Toyama 930-8555, Japan
Abstract:
Capsule catalysts composed of pre-shaped core catalysts and layer zeolites have been widely used in the tandem reactions where multiple continuous reactions are combined into one process. They show excellent catalytic performance in heterogeneous catalysis, including the direct synthesis of middle isoparaffins or dimethyl ether from syngas, as compared to the conventional hybrid catalysts. The present review highlights the recent development in the design of capsule catalysts and their catalytic applications in heterogeneous catalysis. The capsule catalyst preparation methods are introduced in detail, such as hydrothermal synthesis method, dual-layer method, physically adhesive method and single crystal crystallization method. Furthermore, several new applications of capsule catalysts in heterogeneous catalytic processes are presented such as in the direct synthesis of liquefied petroleum gas from syngas, the direct synthesis of para-xylene from syngas and methane dehydroaromatization. In addition, the development in the design of multifunctional capsule catalysts is discussed, which makes the capsule catalyst not just a simple combination of two different catalysts, but has some special functions such as changing the surface hydrophobic or acid properties of the core catalysts. Finally, the future perspectives of the design and applications of capsule catalysts in heterogeneous catalysis are provided.
Key words:  Capsule catalyst  Tandem reaction  Zeolite  Heterogeneous catalysis
FundProject:The work was supported by the Key R & D plan (East-West Cooperation) of Ningxia and the First-rate Discipline Construction Project of Ningxia (NXYLXK2017A04).
多功能胶囊催化剂在多相催化中的应用研究进展
高新华1, 马清祥1, 赵天生1, 鲍骏2, 椿范立3
1.省部共建煤炭高效利用与绿色化工国家重点实验室, 化学化工学院, 宁夏大学, 银川 750021;2.中国科学技术大学国家同步辐射实验室, 合肥 230029;3.日本富山大学工学部应用化学科, 富山 930-8555
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DOI:10.1063/1674-0068/31/cjcp1805129
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