催化作用
化学工程
费托法
选择性
介孔材料
X射线光电子能谱
沸石
化学
甲醇
ZSM-5型
材料科学
有机化学
工程类
作者
Hangjie Li,Peipei Zhang,Lisheng Guo,Yingluo He,Yan Zeng,Montree Thongkam,Jaru Natakaranakul,Tatsuki Kojima,Prasert Reubroycharoen,Tharapong Vitidsant,Guohui Yang,Noritatsu Tsubaki
出处
期刊:Chemsuschem
[Wiley]
日期:2020-01-30
卷期号:13 (8): 2060-2065
被引量:25
标识
DOI:10.1002/cssc.201903576
摘要
Abstract A Pd/SiO 2 @S1@H‐ZSM‐5 capsule catalyst (Pd/SiO 2 –SZ) is fabricated through a dual‐layer crystal growth method with an auxiliary hydrothermal reaction. The catalyst exhibits excellent selectivity to liquefied petroleum gas (LPG) in CO 2 hydrogenation reactions, which is attributed to the tandem reactions of methanol synthesis on the Pd/SiO 2 core catalyst and methanol dehydration to hydrocarbons on the H‐ZSM‐5 shell. The Pd/SiO 2 –SZ capsule catalyst has a similar mesoporous structure, narrow range of Pd particles size distribution, and consistent reduction characteristics to the Pd/SiO 2 core catalyst. It maintains the physical and chemical properties of the core catalyst throughout the H‐ZSM‐5 shell synthesis process. Energy‐dispersive X‐ray spectroscopy and X‐ray photoelectron spectroscopy results reveal that the H‐ZSM‐5 zeolite shell completely encapsulates the Pd/SiO 2 core catalyst. Compared with the crushed capsule catalyst (Pd/SiO 2 –SZP), the well‐defined‐structured Pd/SiO 2 –SZ catalyst has a much higher LPG selectivity of 33.6 %, owing to the well‐matched reactions at the Pd/SiO 2 core and H‐ZSM‐5 shell.
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