Formation of polymer-grade ethylene by selective hydrogenation of acetylene over Au/CeO2 catalyst

被引：144

作者：

Azizi, Yassine ^{[1
]}

Petit, Corinne ^{[1
]}

Pitchon, Veronique ^{[1
]}

机构：

[1] CNRS ECPM, UMR 7515, Lab Mat Surfaces & Procedes Catalyse, F-67087 Strasbourg, France

来源：

JOURNAL OF CATALYSIS | 2008年 / 256卷 / 02期

关键词：

acetylene hydrogenation; gold; Au catalyst; coke deposits;

D O I：

10.1016/j.jcat.2008.04.003

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：

Acetylene hydrogenation and formation of coke deposits were investigated on a gold catalyst supported on ceria. The effect of the H-2/C2H2 ratio was studied over a range of values. In all cases, the catalyst revealed a selectivity of 100% below 300 degrees C. Above this temperature, the only byproduct was methane formed via carbene intermediates, which polymerize above 300 degrees C, provoking deactivation. The deactivation was studied by TPO; accumulation of carbon at low temperature provoked deactivation only after several hours of operation, but did not affect the selectivity. The roles of the pretreatment and of the presence of CO also were examined. A mechanism for the hydrogenation reaction is proposed. (c) 2008 Elsevier Inc. All rights reserved.

引用

页码：338 / 344

页数：7

共 44 条

[1] Coke formation and its effect on internal mass transfer and selectivity in Pd-catalysed acetylene hydrogenation [J].

Asplund, S .

JOURNAL OF CATALYSIS, 1996, 158 (01) :267-278

[2] PERFORMANCE AND AGING OF CATALYSTS FOR THE SELECTIVE HYDROGENATION OF ACETYLENE - A MICROPILOT-PLANT STUDY [J].

BATTISTON, GC ;

DALLORO, L ;

TAUSZIK, GR .

APPLIED CATALYSIS, 1982, 2 (1-2) :1-17

[3]

Bond G.C., 1973, Gold Bulletin, V6, P102, DOI [10.1007/BF03215018, DOI 10.1007/BF03215018]

[4]

BOND GC, 1973, J CHEM SOC CHEM COMM, P444

[5] Catalysis by gold [J].

Bond, GC ;

Thompson, DT .

CATALYSIS REVIEWS-SCIENCE AND ENGINEERING, 1999, 41 (3-4) :319-388

[6]

BOND GC, 1964, ADV CATAL, V15, P92

[7] NEW SUPPORTED PALLADIUM CHROMIUM CATALYSTS - CHARACTERIZATION AND CATALYTIC PROPERTIES [J].

BORGNA, A ;

MORAWECK, B ;

MASSARDIER, J ;

RENOUPREZ, AJ .

JOURNAL OF CATALYSIS, 1991, 128 (01) :99-112

[8] Surface heterogeneity of supported palladium catalyst for the hydrogenation of acetylene-ethylene mixtures [J].

Borodzinski, A ;

Golebiowski, A .

LANGMUIR, 1997, 13 (05) :883-887

[9] The kinetic model of hydrogenation of acetylene-ethylene mixtures over palladium surface covered by carbonaceous deposits [J].

Borodzinski, A ;

Cybulski, A .

APPLIED CATALYSIS A-GENERAL, 2000, 198 (1-2) :51-66

[10] Acetylene hydrogenation on Au-based catalysts [J].

Choudhary, TV ;

Sivadinarayana, C ;

Datye, AK ;

Kumar, D ;

Goodman, DW .

CATALYSIS LETTERS, 2003, 86 (1-3) :1-8

← 1 2 3 4 5 →