Roles of Interaction between Components in CZZA/HZSM-5 Catalyst for Dimethyl Ether Synthesis via Co₂ Hydrogenation
The roles of interaction between two catalyst components in CuO-ZnO-ZrO2-Al2O₃ (CZZA)/HZSM-5 bifunctional catalyst for dimethyl ether (DME) synthesis via carbon dioxide hydrogenation were investigated. It was found that CZZA catalyst showed excellent stability during methanol (MeOH) synthesis for 100 h, while there was a severe loss of catalytic activity in the bifunctional catalyst for DME synthesis. Hence, the effects of different degrees of intimacy of two catalyst components were studied for DME synthesis, including mixed and separated modes. For the mixed mode, the particle size of catalysts and the amount of reaction intermediates were proven to influence the catalyst deactivation. For the separated mode, the catalysts showed rapid deactivation within a short time. Various characterizations indicated that the remarkable deactivation of separated mode was mainly caused by the decrease of copper active centers (e.g., sintering and oxidation) and blockage of acid sites via increased coke deposition on HZSM-5.
X. Fan et al., "Roles of Interaction between Components in CZZA/HZSM-5 Catalyst for Dimethyl Ether Synthesis via Co₂ Hydrogenation," AIChE Journal, vol. 67, no. 11, article no. e17353, Wiley, Nov 2021.
The definitive version is available at https://doi.org/10.1002/aic.17353
Chemical and Biochemical Engineering
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01 Nov 2021