Sinopec Maoming Petrochemical Company
School of Chemistry and Molecular Engineering,East China University ofScience and Technology

C2—C4烯烃()是国民经济发展的重要化工原料,我国需求量逐年攀升,而C=2—C=4C=2—C=4其生产工艺主要依赖石脑油裂解。将煤炭、天然气、生物质等非石油基碳资源先转化为合成气(CO/H2)再转化为,对维护我国能源安全至关重要。同时,将工业烟气中的CO2作为碳资源C=2—C=4转化为,对实现人工碳循环、解决温室气体带来的全球气候问题具有重要战略意义。相比于传C=2—C=4统费托合成技术,通过金属氧化物–分子筛(Oxide−Zeolite,OX−ZEO)路线将COx(包括CO和CO2)直接高选择性转化为被认为是一个突破性的发展,但目前仍然存在COx转化效率与C=2—C=4产率的制衡关系。笔者概述了近年来OX−ZEO催化在COx加氢制低碳烯烃中的研究进展,重C=2—C=4点讨论了影响催化性能的关键因素如金属氧化物的种类和元素组成以及分子筛酸性与拓扑结构等,详细解析了氧空位作用和抑制副反应策略对COx加氢反应调控机制,同时总结了OX−ZEO的催化反应机理,对OX−ZEO双功能催化路径在COx加氢转化制低碳烯烃应用中目前存在的挑战和未来的发展进行了展望。

C2—C4 olefin () is a major chemical raw material and in a flourishing demand in China. Currently, its manufacturing technique is mostly based on naphtha cracking,which is not in line with the national energy endowment of “rich coal but lean oil”. Coal gasification,typically produces syngas (CO/H2) first,and subsequently to olefin (STO) is considered as a promising technology. Meanwhile,converting CO2 from industrial flue gas into is critical for realizing the “Carbon Neutrality”. The direct and highly selective conversion of COx (both CO and CO2) to via the metal Oxide−Zeolite (OX−ZEO) route breaks through the limitation of the Anderson-Schulz-Flory distribution of the traditional Fischer-Tropsch synthesis technology,but still suffers from the trade-off between COx conversion efficiency and yield. This paper mainly reviews recent development of OX−ZEO bifunctional catalysis strategy for COx hydrogenation to light olefins,with emphasis on the effects of the type and elemental composition of metal oxides,the acidity and topological structure of zeolite on the catalytic performance. The role of oxygen vacancy and side reaction inhibition strategies on COx hydrogenation has also been clarified. In addition,the reaction mechanism over OX−ZEO is reviewed indetail. With this, the authors put forward insights into significant promising tendencies and confronting challenges in the strategy ofOX−ZEO for COx to light olefin.

国家自然科学基金资助项目(22278126,22250005,22408095);中国博士后科学基金资助项目(2023M741170);中央高校基本科研业务费专项资金资助项目(JKB01231715)

杨庆伟,孙哲毅,邵斌,等.COx高选择性加氢制低碳烯烃研究进展[J].洁净煤技术,2024,30(11):1−12.

YANG Qingwei, SUN Zheyi, SHAO Bin, et al. Research progress in highly selective hydrogenation of COx to light olefins[J].Clean Coal Technology,2024,30(11):1−12.