Conversion of methanol over 10-ring zeolites with differing volumes at channel intersections: comparison of TNU-9, IM-5, ZSM-11 and ZSM-5

被引：149

作者：

Bleken, Francesca ^{[1
]}

Skistad, Wegard ^{[1
]}

Barbera, Katia ^{[2
]}

Kustova, Marina ^{[3
]}

Bordiga, Silvia ^{[2
]}

Beato, Pablo ^{[3
]}

Lillerud, Karl Petter ^{[1
]}

Svelle, Stian ^{[1
]}

Olsbye, Unni ^{[1
]}

机构：

[1] Univ Oslo, InGAP Ctr Res Based Innovat, Ctr Mat Sci & Nanotechnol SMN, Dept Chem, N-0315 Oslo, Norway

[2] Univ Turin, Dipartimento Chim, IFM NIS Ctr Excellence, I-10125 Turin, Italy

[3] Haldor Topsoe, DK-2800 Lyngby, Denmark

来源：

PHYSICAL CHEMISTRY CHEMICAL PHYSICS | 2011年 / 13卷 / 07期

关键词：

TO-HYDROCARBONS REACTION; REACTION-MECHANISM; MTO REACTION; AROMATIC-HYDROCARBONS; CATALYTIC-PROPERTIES; SHAPE SELECTIVITY; LIGHT OLEFINS; MEDIUM-PORE; SAPO-34; TRANSFORMATION;

D O I：

10.1039/c0cp01982h

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：

Four 3D 10-ring zeolites, IM-5, TNU-9, ZSM-11 and ZSM-5, with Si/Al = 14-24 and crystal sizes below 2 microns, were tested as catalysts for the methanol to hydrocarbons reaction (MTH) at atmospheric pressure, 350 degrees C and WHSV = 9 h (1). All catalysts gave initially full methanol conversion, and showed strikingly similar effluent product selectivities. However, their life-time duration differed significantly, and decreased in the order: ZSM-11 > ZSM-5 >> TNU-9 > IM-5. A main difference between the two groups of stability behaviour was the size of cavities formed by channel intersections; larger cavities in TNU-9 and IM-5 leading to polyaromatics formation and a more rapid deactivation compared to ZSM-5 and ZSM-11. Effluent yield-conversion plots suggested that polymethylated benzene intermediates were more important in IM-5 and TNU-9 than in ZSM-5 and ZSM-11, where alkene methylation and cracking reactions seemed to dominate product formation. However, this difference had only minor influence on effluent selectivity.

引用

页码：2539 / 2549

页数：11

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