Coke evolution on mesoporous ZSM-5 during methanol to propylene reaction

被引：32

作者：

Zhang, Yunpeng ^{[1
]}

Li, Minggang ^{[1
]}

Xing, Enhui ^{[1
]}

Luo, Yibin ^{[1
]}

Shu, Xingtian ^{[1
]}

机构：

[1] Sinopec, Res Inst Petr Proc, Xueyuan Rd 18, Beijing 100083, Peoples R China

来源：

CATALYSIS COMMUNICATIONS | 2019年 / 119卷

关键词：

Methanol to propylene; ZSM-5; Mesoporous; Deactivation behavior; Coke location; ZEOLITE CATALYST; DEACTIVATION; CONVERSION; H-ZSM-5; HYDROCARBONS; PERFORMANCE; SELECTIVITY; LOCATION; BEHAVIOR; SAPO-34;

D O I：

10.1016/j.catcom.2018.10.009

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Coke evolution during MTP reaction over mesoporous ZSM-5 zeolite was investigated at 480 degrees C in a fixed-bed reactor. Fresh and deactivated mesoporous ZSM-5 zeolites at different stages were characterized by TG, N-2 adsorption-desorption, GC-MS, XRD, TEM as well as NH3-TPD. The characterization results showed the 'S' type curve of coke depositions with three stages along TOS. Internal coke was initially deposited in micropores of zeolite with initial soluble carbonaceous species identified as bulky alkylbenzenes such as tetraMBs and pentaMBs. Along TOS, the initial soluble carbonaceous species could grow into insoluble coke leading to rapid occupation in mesopores.

引用

页码：67 / 70

页数：4

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