期刊
CHEMICAL ENGINEERING JOURNAL
卷 203, 期 -, 页码 201-211出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2012.07.011
关键词
Methanol synthesis; DME synthesis; Methanol dehydration; CuO/ZnO/Al2O3 catalyst; Acid catalyst; Syngas
资金
- EPSRC [EP/G012156/1] Funding Source: UKRI
- Engineering and Physical Sciences Research Council [EP/G012156/1] Funding Source: researchfish
Herein we investigate the use of CuO-ZnO-Al2O3 (CZA) with different solid acid catalysts (NH(4)ZSM-5. HZSM-5 or gamma-Al2O3) for the production of dimethyl ether from syngas. It was found that of the solid acids, which are necessary for the dehydration function of the admixed system, the CZA/HZSM-5 bifunctional catalyst with a 0.25 acid fraction showed high stability over a continuous period of 212 h. As this particular system was observed to loose around 16.2% of its initial activity over this operating period this study further investigates the CZA/HZSM-5 bifunctional catalyst in terms of its deactivation mechanisms. TPO investigations showed that the catalyst deactivation was related to coke deposited on the metallic sites: interface between the metallic sites and the support near the metal-support: and on the support itself. (C) 2012 Elsevier B.V. All rights reserved.
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