Recent Advances in the Mitigation of the Catalyst Deactivation of CO2 Hydrogenation to Light Olefins
Recent Advances in the Mitigation of the Catalyst Deactivation of CO2 Hydrogenation to Light Olefins
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DOI：
10.3390/catal11121447
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发表时间：
2021-11
期刊：
影响因子：
3.9
通讯作者：
D. Weber;T. He;Matthew Wong;Christian Moon;Axel Zhang;Nicole Foley;Nicholas J. Ramer;Cheng Zhang-C
中科院分区：
文献类型：
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作者：
D. Weber;T. He;Matthew Wong;Christian Moon;Axel Zhang;Nicole Foley;Nicholas J. Ramer;Cheng Zhang-C
长期以来，如果使用绿色氢，将二氧化碳催化转化为增值化学品和燃料一直被视为减少二氧化碳排放的一种有希望的方法。轻质烯烃，特别是乙烯和丙烯，作为聚合物和塑料的基本原料，目前主要是从产生二氧化碳的化石资源中生产的。寻找具有选择性途径的高效催化剂从二氧化碳中生产轻质烯烃是一个高回报的目标，但它存在严重的技术挑战，如低选择性和催化剂失活。在这篇综述中，我们首先简要概述了两种主要的反应途径（CO2- fisher - tropsch和meoh介导的途径），机理见解和催化材料的CO2加氢制备轻质烯烃。然后，我们列出了碳沉积、水形成、相变和金属烧结/团聚导致的主要失活机制。最后，我们详细介绍了催化剂在提高烯烃收率和稳定性方面的最新进展，包括催化剂的以下功能：(1)促进剂效应，(2)支撑效应，(3)双功能复合催化剂效应，以及(4)结构效应。本文综述的主要目的是为研究人员提供一个有用的资源，以便将催化剂失活与提高烯烃收率和催化剂稳定性的催化剂发展的最新研究成果联系起来。
The catalytic conversion of CO2 to value-added chemicals and fuels has been long regarded as a promising approach to the mitigation of CO2 emissions if green hydrogen is used. Light olefins, particularly ethylene and propylene, as building blocks for polymers and plastics, are currently produced primarily from CO2-generating fossil resources. The identification of highly efficient catalysts with selective pathways for light olefin production from CO2 is a high-reward goal, but it has serious technical challenges, such as low selectivity and catalyst deactivation. In this review, we first provide a brief summary of the two dominant reaction pathways (CO2-Fischer-Tropsch and MeOH-mediated pathways), mechanistic insights, and catalytic materials for CO2 hydrogenation to light olefins. Then, we list the main deactivation mechanisms caused by carbon deposition, water formation, phase transformation and metal sintering/agglomeration. Finally, we detail the recent progress on catalyst development for enhanced olefin yields and catalyst stability by the following catalyst functionalities: (1) the promoter effect, (2) the support effect, (3) the bifunctional composite catalyst effect, and (4) the structure effect. The main focus of this review is to provide a useful resource for researchers to correlate catalyst deactivation and the recent research effort on catalyst development for enhanced olefin yields and catalyst stability.