Critical review of integrated CO2 capture and conversion via calcium-looping dry reforming of methane

作者：Rui Fang, Tuo Zhou, Haowen Wu, Tong Wang, Yinqiang Song, Man Zhang, Xin Meng, Yupeng Feng, Hairui Yang · 发表于：Chemical Engineering Journal · 年份：2025 · DOI：10.1016/j.cej.2025.170689 · 被引用次数：7 · 研究领域：Chemical Looping and Thermochemical Processes、Catalysts for Methane Reforming、Adsorption and Cooling Systems

Calcium-looping dry reforming of methane (CaL-DRM) has emerged as a promising technology for integrated CO 2 capture and conversion, enabling direct production of syngas from high-temperature mixed gases. In this process, CO 2 is captured by CaO, and the subsequent calcination of CaCO 3 is coupled in situ with dry reforming of methane (DRM) using catalysts supported on CaO-based dual-function materials (DFMs). This integration enhances energy efficiency and alters reaction equilibria, leading to higher conversions of CO 2 and CH 4 compared to standalone reforming at equivalent temperatures. However, industrial deployment of CaL-DRM remains hindered by DFM instability and uncertainties in application implementation. To support the scale-up and industrial adoption of CaL-DRM, this review provides a comprehensive analysis spanning fundamental principles to practical applications. We begin by systematically examining reaction mechanisms and thermodynamic characteristics. Then the design strategies of stable DFMs were discussed based on the review of CaO-based sorbents, DRM catalysts, and current DFMs. Moreover, based on the discussion of CaL-DRM application potential in various scenarios, key influencing factors and optimization strategies in industrial application, such as temperature, gas composition, and reactor configurations, were thoroughly discussed. Finally, we identify major challenges and future research priorities, highlighting the need for advanced mechanistic studies...