The role of Mn and Li promoters in supported rhodium catalysts in the formation of acetic acid and acetaldehyde

被引：57

作者：

Luo, HY

Lin, PZ

Xie, SB

Zhou, HW

Xu, CH

Huang, SY

Lin, LW

Liang, DB

Yin, PL

Xin, Q

机构：

[1] CHINESE ACAD SCI,DALIAN INST CHEM PHYS,DALIAN 116023,PEOPLES R CHINA

[2] CHINESE ACAD SCI,DALIAN INST CHEM PHYS,STATE KEY LAB CATALYSIS,DALIAN 116023,PEOPLES R CHINA

来源：

JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL | 1997年 / 122卷 / 2-3期

关键词：

rhodium; manganese; lithium; acetic acid; acetaldehyde;

D O I：

10.1016/S1381-1169(97)00012-5

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：

Rh-Mn-Li/SiO2 catalysts consisting of 1 wt% Rh for the synthesis of C-2 oxygenates from syngas were studied by CO + H-2 reaction and characterized by TPR, H-2-TPD, ESR and IR techniques. The Rh-Mn-Li/SiO2 catalysts, which showed a good selectivity for the formation of acetic acid and acetaldehyde, have been found to be quite different from the Rh-V/SiO2 catalysts reported previously, which mainly promoted the formation of ethanol. Comparing with the Rh-V/SiO2 catalysts, the Rh-Mn-Li/SiO2 exhibited lower capacity of hydrogen adsorption, lower hydrogenation activity, more intense interaction of the manganese oxide with the Rh component, and more intense bands of twin-adsorbed CO (i.e. more Rh1+ ion). The good selectivity of the Rh-Mn-Li/SiO2 catalysts towards acetaldehyde and acetic acid formation were correlated to these features. (C) 1997 Elsevier Science B.V.

引用

页码：115 / 123

页数：9

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