Influence of Si/Ga and Si/Al ratios on propane aromatization over highly active H-GaAlMFI

被引：41

作者：

Choudhary, TV ^{[1
]}

Kinage, A

Banerjee, S

Choudhary, VR

机构：

[1] Bartlesville Technol Ctr, ConocoPhillips Co, Bartlesville, OK 74004 USA

[2] Natl Chem Lab, Div Chem Engn, Pune 411008, Maharashtra, India

来源：

CATALYSIS COMMUNICATIONS | 2006年 / 7卷 / 03期

关键词：

aromatization; Si/Ga ratio; Si/Al ratio; propane; Ga-based zeolites; zeolitic factors;

D O I：

10.1016/j.catcom.2005.10.006

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：

Conversion of propane to aromatics has been investigated at 550 degrees C and space velocity range of 3000-12000 cc/g/h over galloaluminosilicate zeolites (GaAlMFI) containing similar bulk Si/(Al + Ga) ratio but markedly different individual Si/Al and Si/Ga ratios. While Al showed a propensity to be distributed predominantly in the zeolite framework, a large fraction of total Ga was present as non-FW Ga species; due to this the strong acidity was higher for the GAlMFI zeolite with the larger bulk Al content. The zeolite with the larger bulk Al content (GAL1) showed superior propane aromatization (initial and time-on-stream) activity compared to the zeolite with the larger Ga content (GAL2). The aromatic distribution was also significantly influenced by the bulk Si/Al and Si/Ga ratios of the zeolites. While the benzene and C-8 aromatics selectivity was higher for GAL2, the selectivity for toluene was higher for GAL1. (c) 2005 Elsevier B.V. All rights reserved.

引用

页码：166 / 169

页数：4

共 17 条

[1] AROMATIZATION OF PROPANE OVER MFI-GALLOSILICATES [J].

BAYENSE, CR ;

VANDERPOL, AJHP ;

VANHOOFF, JHC .

APPLIED CATALYSIS, 1991, 72 (01) :81-98

[2] AROMATIZATION OF PROPANE OVER GALLIUM-CONTAINING H-ZSM-5 ZEOLITES - INFLUENCE OF THE PREPARATION METHOD ON THE PRODUCT SELECTIVITY AND THE CATALYTIC STABILITY [J].

BAYENSE, CR ;

VANHOOFF, JHC .

APPLIED CATALYSIS, 1991, 79 (01) :127-140

[3] Effect of temperature on the product selectivity and aromatics distribution in aromatization of propane over H-GaAlMFI zeolite [J].

Choudhary, TV ;

Kinage, AK ;

Banerjee, S ;

Choudhary, VR .

MICROPOROUS AND MESOPOROUS MATERIALS, 2004, 70 (1-3) :37-42

[4]

CHOUDHARY TV, UNPUB

[5]

CHOUDHARY TV, IN PRESS MICROPOR ME

[6] Simultaneous conversion of methane and methanol into gasoline over bifunctional Ga-, Zn-, In-, and/or Mo-modified ZSM-5 zeolites [J].

Choudhary, VR ;

Mondal, KC ;

Mulla, SAR .

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION, 2005, 44 (28) :4381-4385

[7] Pulse reaction studies on variations of initial activity selectivity of O-2 and H-2 pretreated Ga-modified ZSM-5 type zeolite catalysts in propane aromatization [J].

Choudhary, VR ;

Kinage, AK ;

Sivadinarayana, C ;

Guisnet, M .

JOURNAL OF CATALYSIS, 1996, 158 (01) :23-33

[8] Influence of zeolite factors affecting zeolitic acidity on the propane aromatization activity and selectivity of Ga/H-ZSM-5 [J].

Choudhary, VR ;

Mantri, K ;

Sivadinarayana, C .

MICROPOROUS AND MESOPOROUS MATERIALS, 2000, 37 (1-2) :1-8

[9] INITIAL ACTIVITY SELECTIVITY OF H-GALLOSILICATE (MFI) IN PROPANE AROMATIZATION - INFLUENCE OF H+ EXCHANGE AND THERMAL HYDROTHERMAL PRETREATMENTS [J].

CHOUDHARY, VR ;

KINAGE, AK ;

SIVADINARAYANA, C ;

SANSARE, SD ;

GUISNET, M .

CATALYSIS LETTERS, 1995, 33 (3-4) :401-412

[10] Direct aromatization of natural gas over H-gallosilicate (MFI), H-galloaluminosilicate (MFI) and Ga/H-ZSM-5 zeolites [J].

Choudhary, VR ;

Kinage, AK ;

Choudhary, TV .

APPLIED CATALYSIS A-GENERAL, 1997, 162 (1-2) :239-248

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