Law Zhi Xuan, Watcharasawat Nattanan, Pavarajarn Varong, Tsai De-Hao
Department of Chemical Engineering, National Tsing Hua University, Hsinchu 300044, Taiwan, R.O.C.
Department of Chemical Engineering, Chulalongkorn University, Bangkok 10330, Thailand.
Langmuir. 2025 Sep 16;41(36):24398-24407. doi: 10.1021/acs.langmuir.5c02551. Epub 2025 Sep 8.
Chemical absorption of carbon dioxide using monoethanolamine (MEA) is a well-established method for postcombustion CO capture. In this study, we aimed to integrate (1) the MEA-based CO capture with the regeneration of MEA using calcium-based mineralization, followed by (2) direct utilization of captured CO to form syngas via a calcium looping-based dry reforming of methane (CaL-DRM), an interfacial catalytic process. The results show that room-temperature CO capture-MEA regeneration was achievable by using calcium-based mineralization. The formed Ni-Ca material was shown to be active for converting the captured CO into syngas via the CaL-DRM reaction at 600 °C. A 10-cycle stability test confirmed the operational stability of the Ni-Ca material, with consistent CO uptake capacity ( = 6.1-6.3 mmol/g) and stable syngas yields ( = 14.2-14.5 mmol/g, = 12.1-12.9 mmol/g). These results demonstrate the feasibility of integrating CO capture-mineralization with CaL-DRM, offering a sustainable and energy-efficient pathway for CO utilization and syngas generation.
使用单乙醇胺（MEA）对二氧化碳进行化学吸收是一种成熟的燃烧后二氧化碳捕集方法。在本研究中，我们旨在将（1）基于MEA的二氧化碳捕集与利用钙基矿化对MEA进行再生相结合，接着（2）通过基于钙循环的甲烷干重整（CaL-DRM，一种界面催化过程）将捕获的二氧化碳直接用于合成气的生成。结果表明，利用钙基矿化可实现室温二氧化碳捕集-MEA再生。所形成的Ni-Ca材料在600℃下通过CaL-DRM反应将捕获的二氧化碳转化为合成气表现出活性。一项10次循环稳定性测试证实了Ni-Ca材料的操作稳定性，其二氧化碳吸收容量一致（=6.1-6.3 mmol/g）且合成气产率稳定（=14.2-14.5 mmol/g，=12.1-12.9 mmol/g）。这些结果证明了将二氧化碳捕集-矿化与CaL-DRM相结合的可行性，为二氧化碳利用和合成气生成提供了一条可持续且节能的途径。
