2014
DOI: 10.1016/j.apcata.2014.08.030
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The role of external acid sites of ZSM-5 in deactivation of hybrid CuZnAl/ZSM-5 catalyst for direct dimethyl ether synthesis from syngas

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Cited by 66 publications
(57 citation statements)
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“…However, such deactivation was associated with a considerable Fischer-Tropsch activity and paraffin formation, which is not common for typical Cu-based methanol synthesis catalysts. In addition, as mentioned earlier, detrimental interactions between metallic and acid components of the hybrid catalyst [9][10][11][12] as well as methanol dehydration (by)products (water [16] and hydrocarbons [31]) are reported to be influential on methanol synthesis catalyst deactivation during the direct DME synthesis.…”
Section: Catalyst Deactivationmentioning
confidence: 99%
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“…However, such deactivation was associated with a considerable Fischer-Tropsch activity and paraffin formation, which is not common for typical Cu-based methanol synthesis catalysts. In addition, as mentioned earlier, detrimental interactions between metallic and acid components of the hybrid catalyst [9][10][11][12] as well as methanol dehydration (by)products (water [16] and hydrocarbons [31]) are reported to be influential on methanol synthesis catalyst deactivation during the direct DME synthesis.…”
Section: Catalyst Deactivationmentioning
confidence: 99%
“…For instance, high content of water caused by hydrogenation of a CO 2 -rich syngas over the metallic component of the hybrid catalyst enhances the deactivation of the Lewis sites of the acid component through strong water adsorption [15]. On the other hand, extra amount of water formed through methanol dehydration over the acid component of the hybrid, enhances the deactivation of the metallic component by assisting morphological changes and hydrothermal leaching of Zn and Al [11,16]. At the same time, water is known to attenuate coke formation and deposition over both functions of the hybrid catalysts [16,17].…”
Section: Ch 3 Oh(g)mentioning
confidence: 99%
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“…Dimethyl 15 ether, methanol, carbon dioxide, hydrocarbons and water were the major products of carbon 16 monoxide hydrogenation. reports [40] suggest that the deactivation of CZA/ZSM-5 catalysts can be due to several 20 phenomena: copper sintering, copper oxidation and migration to the cationic positions of 21 zeolite, coke deposition. 22…”
Section: Catalytic Performance In Direct Dme Synthesis 13mentioning
confidence: 99%