CO2甲烷化研究进展

CO_2是造成温室效应的主要气体,作为碳基能源使用的末端形态,CO_2也是种重要的基础碳源。因此,将CO_2转化为能源产品可以快速实现碳的循环,对环境与能源领域意义重大。介绍了CO_2的排放、回收以及资源化利用现状,从催化剂体系、反应机理、合成工艺以及工业化现状等方面系统地介绍了CO_2甲烷化的发展。针对H2供给对CO_2甲烷化应用的限制,分析了电解水制氢再与CO_2进行甲烷化反应的电制气(Pt G)技术的发展现状、工艺路线及其经济性,讨论了该技术在我国应用的可行性。提出随着CO_2捕集与新能源相关技术的发展,Pt G技术会更加成熟,将有望成为未来CO_2资源化利用的重要形式。

Progress of CO2 methanation

Carbon dioxide (CO₂) is not only the main greenhouse gas,but one of the most important carbon source in the world as the used form of carbon-based energy.Therefore,as an anthropogenic chemical carbon cycle,converting CO₂ into energy products will be of great significance for environment and energy.CO₂ emission,recovery and resource utilization were reviewed,as well as development of CO₂ methanation in terms of catalyst system, reaction mechanisms,synthesis process,industrial status.In addition,the development,route and economy of the Power-to-Gas(PtG) technology were introduced and analyzed considering the restrictions of H₂ supply in the industrial application of CO₂ methanation.And the PtG technology will become more mature with the development of CO₂ capture and CO₂ methanation technics.Thus,it is proposed that PtG technology will become as a very important form of future CO₂ utilization.