在金属基异质催化剂上进行 CO2- 辅助轻烷氧化脱氢反应

IF 15.7 1区化学 Q1 CHEMISTRY, APPLIED

Chinese Journal of Catalysis Pub Date : 2024-10-01 DOI:10.1016/S1872-2067(24)60094-X

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引用次数: 0

摘要

轻烯烃是石化工业的重要平台原料，全球经济的持续发展推动了对这些化合物需求的持续增长。从页岩气中提取的烷烃脱氢可作为烯烃的替代生产路线。同时，实现碳中和的目标也促进了温室气体的综合利用。轻质烷烃脱氢和二氧化碳还原（CO2-ODH）一体化工艺既能生产轻质烯烃，又能实现二氧化碳的资源化利用，受到广泛欢迎。引入二氧化碳后，可有效抑制烷烃脱氢反应中遇到的焦炭沉积和金属还原。二氧化碳辅助的烷烃脱氢反应还可以降低与 O2 氧化脱氢反应相关的潜在爆炸危险。近期对各种金属基催化剂（包括单、双金属合金和氧化物）的研究显示，这些催化剂因其独特的性能而具有良好的表现。本文对近年来开发的金属基催化剂在 CO2-辅助轻烷（C2-C4）氧化脱氢反应中取得的进展进行了全面综述和批判性分析。此外，本文还对各种活性位点的结构特性、催化活性和反应机理进行了比较总结，为未来脱氢催化剂的设计提供了宝贵的见解。

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CO2-assisted oxidation dehydrogenation of light alkanes over metal-based heterogeneous catalysts

Light olefins are important platform feedstocks in the petrochemical industry, and the ongoing global economic development has driven sustained growth in demand for these compounds. The dehydrogenation of alkanes, derived from shale gas, serves as an alternative olefins production route. Concurrently, the target of realizing carbon neutrality promotes the comprehensive utilization of greenhouse gas. The integrated process of light alkanes dehydrogenation and carbon dioxide reduction (CO₂-ODH) can produce light olefins and realize resource utilization of CO₂, which has gained wide popularity. With the introduction of CO₂, coke deposition and metal reduction encountered in alkanes dehydrogenation reactions can be effectively suppressed. CO₂-assisted alkanes dehydrogenation can also reduce the risk of potential explosion hazard associated with O₂-oxidative dehydrogenation reactions. Recent investigations into various metal-based catalysts including mono- and bi-metallic alloys and oxides have displayed promising performances due to their unique properties. This paper provides the comprehensive review and critical analysis of advancements in the CO₂-assisted oxidative dehydrogenation of light alkanes (C2-C4) on metal-based catalysts developed in recent years. Moreover, it offers a comparative summary of the structural properties, catalytic activities, and reaction mechanisms over various active sites, providing valuable insights for the future design of dehydrogenation catalysts.

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来源期刊

Chinese Journal of Catalysis 工程技术-工程：化工

CiteScore

25.80

自引率

10.30%

发文量

235

审稿时长

1.2 months

期刊介绍： The journal covers a broad scope, encompassing new trends in catalysis for applications in energy production, environmental protection, and the preparation of materials, petroleum chemicals, and fine chemicals. It explores the scientific foundation for preparing and activating catalysts of commercial interest, emphasizing representative models.The focus includes spectroscopic methods for structural characterization, especially in situ techniques, as well as new theoretical methods with practical impact in catalysis and catalytic reactions.The journal delves into the relationship between homogeneous and heterogeneous catalysis and includes theoretical studies on the structure and reactivity of catalysts.Additionally, contributions on photocatalysis, biocatalysis, surface science, and catalysis-related chemical kinetics are welcomed.