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ZSM-5 extrudates modified with phosphorus as a super effective MTP catalyst: Impact of the acidity on binder

文献类型：期刊论文

作者Zhai, Yan-liang1,2; Gong, Yan-jun1,2; Xu, Jun3; Ma, Tong1,2; Zhao, Xiao-meng1,2; Shang, Yun-shan1; Li, Guo-dong1,2; Deng, Feng3; Zhang, Lan-lan1,2; Song, Yu1,2
刊名FUEL PROCESSING TECHNOLOGY
出版日期2017-12-15
卷号168页码:105-115
关键词Phosphorus Modification Zsm-5 Extrudates Binder Steam Treatment Mtp Lifetime Tuning Acidity
DOI10.1016/j.fuproc.2017.08.020
文献子类Article
英文摘要ZSM-5 extrudates catalyst was modified by wet-impregnation using phosphoric acid with various mass concentration (5%, 10% and 15%) and their performances were respectively evaluated in the methanol to propylene (MTP) reaction. This work focused on the changes in property of the extrudates and the interplay of P species with zeolite ZSM-5 and gamma-Al2O3 binder before and after steam treatment. After introducing phosphorous acid, the surface P species was formed on the binder through P hydroxy bonding with Al hydroxy, thus allowed the decrease in number of Lewis acid sites (LAS) of binder. A small amount of P species interacted with TFAI in ZSM-5 powder, due to high silica ZSM-5 zeolite, leading to the reduction of Bronsted acid sites (BAS). For the P modified extrudates, propylene selectivity and catalytic lifetime was improved compared to its pristine one, due to the increase of micropore area and the decrease of acid density with low ratio of strong acid sites/weak acid sites (S/W). After steaming at 500 degrees C, the ratio of S/W on the P-modified extrudates further decreased. For the unmodified extrudates, the decrease was mainly enabled by the reduction in acid density and strong BAS, while for P-modified extrudates, the change of strong LAS of the binder to weak acid was more significant and its total LAS amount is nearly unchanged. The steamed P-modified catalyst (10 wt%) showed high propylene selectivity of 47.5% and the longest lifetime of 218 h at WHSV of 6 h(-1). The mechanism of regulating the acidity of extrudates by phosphorus modification has been proposed.
WOS关键词METHANOL-TO-HYDROCARBONS ; HIGH-SILICA HZSM-5 ; SOLID-STATE NMR ; LIGHT OLEFINS ; ZEOLITE H-ZSM-5 ; HYDROTHERMAL TREATMENT ; DIMETHYL ETHER ; MFI ZEOLITES ; CONVERSION ; PROPYLENE
WOS研究方向Chemistry ; Energy & Fuels ; Engineering
语种英语
WOS记录号WOS:000413391300012
资助机构State Key Development Program for Basic Research of China(2012CB215002) ; State Key Development Program for Basic Research of China(2012CB215002) ; National Natural Science Foundation of China(21276278 ; National Natural Science Foundation of China(21276278 ; U1662116) ; U1662116) ; State Key Development Program for Basic Research of China(2012CB215002) ; State Key Development Program for Basic Research of China(2012CB215002) ; National Natural Science Foundation of China(21276278 ; National Natural Science Foundation of China(21276278 ; U1662116) ; U1662116)
源URL[http://ir.wipm.ac.cn/handle/112942/11431]  
专题武汉物理与数学研究所_磁共振应用研究部
作者单位1.China Univ Petr, State Key Lab Heavy Oil Proc, Beijing 102249, Peoples R China
2.China Univ Petr, Key Lab Catalysis CNPC, Beijing 102249, Peoples R China
3.Wuhan Inst Phys & Math, State Key Lab Magnet Resonance & Atom & Mole Phys, Wuhan 430071, Hubei, Peoples R China
推荐引用方式
GB/T 7714		 Zhai, Yan-liang,Gong, Yan-jun,Xu, Jun,et al. ZSM-5 extrudates modified with phosphorus as a super effective MTP catalyst: Impact of the acidity on binder[J]. FUEL PROCESSING TECHNOLOGY,2017,168:105-115.
APA Zhai, Yan-liang.,Gong, Yan-jun.,Xu, Jun.,Ma, Tong.,Zhao, Xiao-meng.,...&Zhang, Luo-ming.(2017).ZSM-5 extrudates modified with phosphorus as a super effective MTP catalyst: Impact of the acidity on binder.FUEL PROCESSING TECHNOLOGY,168,105-115.
MLA Zhai, Yan-liang,et al."ZSM-5 extrudates modified with phosphorus as a super effective MTP catalyst: Impact of the acidity on binder".FUEL PROCESSING TECHNOLOGY 168(2017):105-115.

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来源：武汉物理与数学研究所

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