The Deactivation Modes of Cu/ZnO/Al2O3 and HZSM-5 Physical Mixture in the One-Step DME Synthesis

被引：29
|
作者：
Barbosa, Flavia S. R. [2 ]
Ruiz, Vanusa S. O. [1 ]
Monteiro, Jose L. F. [3 ]
de Avillez, Roberto R. [4 ]
Borges, Luiz E. P. [2 ]
Appel, Lucia G. [1 ]
机构：
[1] Inst Nacl Tecnol MCT, BR-22081312 Rio De Janeiro, Brazil
[2] Inst Militar Engn, BR-22290270 Rio De Janeiro, Brazil
[3] Univ Fed Rio de Janeiro, NUCAT COPPE, BR-21941 Rio De Janeiro, Brazil
[4] Pontificia Univ Catolica Rio de Janeiro, BR-22453900 Rio De Janeiro, Brazil
来源：
CATALYSIS LETTERS | 2008年 / 126卷 / 1-2期
关键词：
Deactivation; DME; Methanol; ZSM-5; Copper;
D O I：
10.1007/s10562-008-9601-7
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 CO(2) production by shift reaction and the deactivation process are the drawbacks of the One-Step DME Synthesis. Therefore, this contribution discusses possible deactivation modes taking into account the catalytic performance and the characterization of spent catalysts using XRD, TG and FTIR techniques. For this purpose a physical mixture that contains a commercial methanol catalyst and ZSM-5 was employed. It can be suggested that one of the main modes of catalyst deactivation is the hydrocarbon formation by MTG reactions. Changes in the interaction between Cu(0) and ZnO should also be considered. The results show that both of them are affected by H(2)/CO ratio.
引用
收藏
页码：173 / 178
页数：6
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