摘要
CO_(2)甲烷化是生产清洁燃料的重要途径之一,其在减少化石燃料依赖性和利用剩余可再生电力方面非常有潜力。由于CO_(2)甲烷化反应为强放热反应,该反应在低温条件下热力学有利、但动力学受限。Ni基催化剂具有较高的低温活性和稳定性,因此受到关注。介绍了CO_(2)甲烷化反应机理与热力学研究进展,重点阐述了CO_(2)低温甲烷化催化剂合成方法、助剂、载体对催化剂反应性能的影响规律,介绍了新型CO_(2)甲烷化技术,最后对低温CO_(2)甲烷化催化剂未来研究方向进行了展望。结果表明,合成方法影响催化剂的理化性质,进而影响CO_(2)转化率及能效;选择合适的助剂或载体,能够提高Ni基催化剂的分散度和稳定性。因此,设计和制备高活性和高稳定性的Ni基催化剂,是低温CO_(2)甲烷化高效转化的关键。
Carbon dioxide(CO_(2))methanation reaction is one of the most important ways to produce cleaner fuels and has increasingly attracted more attention due to its potential in fossil fuel dependency and the utilization of surplus renewable electricity.Since the CO_(2)methanation reaction is high exothermic,the reaction process is thermodynamically favorable,but its kinetics are limited at low temperatures.Recently,Ni-based catalysts exhibit high activity and stability when used in CO_(2)methanation at low temperature and have been widely studied from industrial and academic community.Herein,the mini-review introduced the research progress of mechanism and thermodynamics of CO_(2)methanation reaction,the effects of the catalyst synthesis methods,promoter and support on the performances of CO_(2)methanation catalysts.A more energy-saving new CO_(2)methanation technology and the design of high performance catalyst for low-temperature CO_(2)methanation in the future was discussed.The results show that the synthesis method affects the physicochemical properties of the catalyst,which in turn affects the CO_(2)conversion and energy efficiency;the selection of promoters or supports can improve the dispersion and stability of Ni-based catalysts.Therefore,the design and preparation of highly active and stable Ni-based catalysts is the key to the efficient conversion of low temperature CO_(2)methanation.
作者
田菊梅
高新华
李亚朝
郭庆杰
梁洁
段斌
TIAN Jumei;GAO Xinhua;LI Yachao;GUO Qingjie;LIANG Jie;DUAN bin(National Quality Supervision and Inspection Center for Coal and Coal Chemical Products(Ningxia),Ningxia Academy of Metrology&Quality Inspection,Yinchuan 750200,China;State Key Laboratory of High-efficiency Utilization of Coal and Green Chemical Engineering,School of Chemistry and Chemical Engineering,Ningxia University,Yinchuan 750021,China)
出处
《洁净煤技术》
CAS
CSCD
北大核心
2024年第S02期112-122,共11页
Clean Coal Technology
基金
国家自然科学基金资助项目(21965029)
宁夏自然科学基金资助项目(2022AAC03040,2022AAC01001)
