Role of support nature （γ-Al2O3 and SiO2-Al2O3） on the performances of rhenium oxide catalysts in the metathesis of ethylene and 2-pentene

被引：0

作者：

Weena Phongsawat ^{[1
]}

Benjamas Netiworaruksa ^{[1
]}

Kongkiat Suriye ^{[2
]}

Siraprapha Dokjampa ^{[2
]}

Piyasan Praserthdam ^{[1
]}

Joongjai Panpranot ^{[1
]}

机构：

[1] Center of Excellence on Catalysis and Catalytic Reaction Engineering, Department of Chemical Engineering, Faculty of Engineering, Chulalongkorn University

[2] SCG Chemicals CO., Ltd. 1 Siam Cement Rd., Bangsue, Bangkok 10800, Thailand

来源：

Journal of Natural Gas Chemistry | 2012年 / 02期

关键词：

metathesis; isomerization; propylene production; 2-pentene; rhenium;

D O I：

暂无

中图分类号：

TQ221.21 [];

学科分类号：

0817 ;

摘要：

The metathesis of ethylene and 2-pentene was studied as an alternative route for propylene production over Re2O7/γ-Al2O3 and Re2O7/SiO2-Al2O3 catalysts. Both NH3 temperature-programmed desorption (NH3-TPD) and H2 temperature-programmed reduction (H2-TPR) results showed that Re2O7/SiO2-Al2O3 exhibited stronger acidity and weaker metal-support interaction than Re2O7/γ-Al2O3. At 35 60℃, isomerization free metathesis was observed only over Re2O7/γ-Al2O3, suggesting that the formation of metal-carbene metathesis active sites required only weak acidity. Our results suggest that on the Re2O7/SiO2-Al2O3, hydrido-rhenium species ([Re]-H) were formed in addition to the metathesis active sites, resulting in the isomerization of the initial 1-butene product into 2-butenes. A subsequent secondary metathesis reaction between these 2-butenes and the excess ethylene could explain the enhanced yields of propylene observed. The results demonstrate the potential for high yield of propylene from alternative feedstocks.

引用

页码：158 / 164

页数：7

共 4 条

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[2] Propylene metathesis over Re2O7/Al2O3-B2O3 catalysts[J] . Fong-Chang Sheu,Cheng-Tsung Hong,Wen-Long Hwang,Cheng-Jec Shih,Jung-Chung Wu,Chuin-Tih Yeh. Catalysis Letters . 1992 (3-4)
[3] IR studies of Re 2 O 7 metathesis catalysts supported on alumina and phosphated alumina[J] . M. Sibeijn,R. Spronk,J. A. R. Veen,J. C. Mol. Catalysis Letters . 1991 (2)
[4] A Surface Organometallic Approach to the Synthesis of Rhenium-Based Catalysts for the Metathesis of Olefins: CH3ReO3/Nb2O5 .2 Buffon,R.,Auroux,A.,Lefebvre,F.,Leconte,M.,Choplin,A.,Basset,J.M.,Herrmann,W.A. J. Mol. Catal . 1992

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