Disentangling the activity-selectivity trade-off in catalytic conversion of syngas to light olefins.
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| Title: | Disentangling the activity-selectivity trade-off in catalytic conversion of syngas to light olefins. |
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| Authors: | Feng Jiao (AUTHOR), Bing Bai (AUTHOR), Gen Li (AUTHOR), Xiulian Pan (AUTHOR), Yihan Ye (AUTHOR), Shengcheng Qu (AUTHOR), Changqi Xu (AUTHOR), Jianping Xiao (AUTHOR), Zhenghao Jia (AUTHOR), Wei Liu (AUTHOR), Tao Peng (AUTHOR), Yilun Ding (AUTHOR), Cheng Liu (AUTHOR), Jinjing Li (AUTHOR), Xinhe Bao (AUTHOR) |
| Source: | Science (pre-March 2025). 5/19/2023, Vol. 380 Issue 6646, p727-730. 4p. 4 Color Photographs. |
| Subjects: | Synthesis gas, Alkenes, Carbon monoxide, Brønsted acids, Catalysts recycling |
| Abstract: | Breaking the trade-off between activity and selectivity has been a long-standing challenge in the field of catalysis. We demonstrate the importance of disentangling the target reaction from the secondary reactions for the case of direct syngas conversion to light olefins by incorporating germanium-substituted AlPO-18 within the framework of the metal oxide-zeolite (OXZEO) catalyst concept. The attenuated strength of the catalytically active Brønsted acid sites allows enhancing the targeted carbon-carbon coupling of ketene intermediates to form olefins by increasing the active site density while inhibiting secondary reactions that consume the olefins. Thus, a light-olefins selectivity of 83% among hydrocarbons and carbon monoxide conversion of 85% were obtained simultaneously, leading to an unprecedented light-olefins yield of 48% versus current reported light-olefins yields of ≤27%. [ABSTRACT FROM AUTHOR] |
| Copyright of Science (pre-March 2025) is the property of American Association for the Advancement of Science and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
| Database: | Psychology and Behavioral Sciences Collection |
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| Abstract: | Breaking the trade-off between activity and selectivity has been a long-standing challenge in the field of catalysis. We demonstrate the importance of disentangling the target reaction from the secondary reactions for the case of direct syngas conversion to light olefins by incorporating germanium-substituted AlPO-18 within the framework of the metal oxide-zeolite (OXZEO) catalyst concept. The attenuated strength of the catalytically active Brønsted acid sites allows enhancing the targeted carbon-carbon coupling of ketene intermediates to form olefins by increasing the active site density while inhibiting secondary reactions that consume the olefins. Thus, a light-olefins selectivity of 83% among hydrocarbons and carbon monoxide conversion of 85% were obtained simultaneously, leading to an unprecedented light-olefins yield of 48% versus current reported light-olefins yields of ≤27%. [ABSTRACT FROM AUTHOR] |
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| ISSN: | 00368075 |
| DOI: | 10.1126/science.adg2491 |
