Properties of alkali-promoted Cu-MgO catalysts and their activity for methanol decomposition and C2-oxygenate formation

被引：27

作者：

Goodarznia, Shahin ^{[1
]}

Smith, Kevin J. ^{[1
]}

机构：

[1] Univ British Columbia, Dept Biol & Chem Engn, Vancouver, BC V6T 1Z3, Canada

来源：

JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL | 2010年 / 320卷 / 1-2期

基金：

加拿大自然科学与工程研究理事会;

关键词：

Catalyst; Promoter; Syngas; Cu-MgO; Basicity; Methyl formate; Ethanol; CO; Cu dispersion; HIGHER ALCOHOL SYNTHESIS; CARBON BOND FORMATION; CESIUM-DOPED CU/ZNO; MG/AL MIXED OXIDES; METHYL FORMATE; OXYGENATE SYNTHESIS; CO HYDROGENATION; KINETIC-MODEL; COPPER; DEHYDROGENATION;

D O I：

10.1016/j.molcata.2010.01.002

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：

The decomposition of CH3OH in the presence of CO has been investigated over high surface area MgO, Cu-MgO, K-Cu-MgO and Cs-Cu-MgO catalysts. The catalysts were prepared by thermal decomposition of metal salts mixed with palmitic acid. The reduced catalysts had surface areas of 18-74 m(2) g(-1) and intrinsic basicities of 4-17 mu mol CO2 m(-2). Results revealed that methyl formate was a primary product of CH3OH decomposition, whereas CO was a secondary product. Although selectivity to C-2 species (ethanol and acetic acid) was low (<5 C-atom %) at the low pressure (101 kPa) conditions of the present study, there was an optimum intrinsic basicity (9.5 mu mol CO2 m(-2)) at which the selectivity to C-2 species and methyl formate reached a maximum. The role of catalyst basic properties in the formation of C-2 species from CH3OH is discussed. (c) 2010 Elsevier BM. All rights reserved.

引用

页码：1 / 13

页数：13