Fu Hong-Chen, You Fei, Li Hong-Ru, He Liang-Nian
College of Pharmacy, Nankai University, Tianjin, China.
State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin, China.
Front Chem. 2019 Jul 24;7:525. doi: 10.3389/fchem.2019.00525. eCollection 2019.
The escalating rate of fossil fuel combustion contributes to excessive CO emission and the resulting global climate change has drawn considerable attention. Therefore, tremendous efforts have been devoted to mitigate the CO accumulation in the atmosphere. Carbon capture and storage (CCS) strategy has been regarded as one of the promising options for controlling CO build-up. However, desorption and compression of CO need extra energy input. To circumvent this energy issue, carbon capture and utilization (CCU) strategy has been proposed whereby CO can be captured and activated simultaneously to participate in the subsequent conversion under mild conditions, offering valuable compounds. As an alternative to CCS, the CCU has attracted much concern. Although various absorbents have been developed for the CCU strategy, the direct, chemical conversion of the captured CO into valuable chemicals remains in its infancies compared with the gaseous CO conversion. This review summarizes the recent progress on CO capture and catalytic transformation. The contents are introduced according to the absorbent types, in which different reaction type is involved and the transformation mechanism of the captured CO and the role of the absorbent in the conversion are especially elucidated. We hope this review can shed light on the transformation of the captured CO and arouse broad concern on the CCU strategy.
化石燃料燃烧率的不断上升导致二氧化碳排放过量，由此引发的全球气候变化已引起广泛关注。因此，人们付出了巨大努力来减少大气中二氧化碳的积累。碳捕获与封存（CCS）策略被视为控制二氧化碳积聚的有前景的选择之一。然而，二氧化碳的解吸和压缩需要额外的能量输入。为了解决这个能源问题，人们提出了碳捕获与利用（CCU）策略，即在温和条件下，二氧化碳可以被捕获并同时被活化，以参与后续转化，生成有价值的化合物。作为CCS的替代方案，CCU已引起广泛关注。尽管已经开发了各种用于CCU策略的吸收剂，但与气态二氧化碳转化相比，将捕获的二氧化碳直接化学转化为有价值的化学品仍处于起步阶段。本综述总结了二氧化碳捕获和催化转化的最新进展。内容根据吸收剂类型进行介绍，其中涉及不同的反应类型，并特别阐明了捕获的二氧化碳的转化机理以及吸收剂在转化中的作用。我们希望本综述能够为捕获的二氧化碳的转化提供启示，并引起对CCU策略的广泛关注。
