摘要
大规模使用化石燃料导致CO_(2)大量排放,由此引发的全球气候问题受到广泛关注。化学链燃烧采用循环载氧体为燃料提供活性氧,改进了传统燃烧方式,避免了N2对烟气的稀释,降低了CO_(2)的捕集成本,具有CO_(2)内分离的优点,在CO_(2)捕集领域具有较大发展潜力。载氧体是化学链燃烧技术的核心,具有传递热量和释放晶格氧的双重作用,但面临磨损率大和寿命较短的问题,严重影响化学链燃烧技术的经济性。综述了载氧体磨损的表观现象和内在机理,发现化学磨损是载氧体磨损的主要因素;总结了评估和预测载氧体磨损的方法,以及提高载氧体耐磨性的方法,并对未来载氧体的研究方向进行了展望。
The large-scale use of fossil fuels has led to excessive CO_(2)emissions,and the resulting global climate problems have received widespread attention.Chemical looping combustion improves the traditional combustion method by using a circulating oxygen carrier to provide active oxygen to the fuel,avoiding the dilution of N2 to the flue gas,reducing the cost of CO_(2)capture and has the advantage of internal separation of CO_(2),which has a great potential for development in the field of CO_(2)capture.Oxygen carrier is the core of chemical looping combustion technology,which plays the dual role of transferring heat and releasing lattice oxygen,but the oxygen carrier faces the problems of large attrition rate and short lifetime,which seriously affect the economy of chemical looping combustion technology.The apparent phenomena and intrinsic mechanism of oxygen carrier attrition were reviewed,and chemical attrition is found to be the main factor of oxygen carrier attrition.The methods of assessing and predicting the attrition of oxygen carrier as well as the methods of improving the abrasion resistance of oxygen carrier were summarized,and the future research of oxygen carrier was also prospected.
作者
朱丹
刘方
宋晨
杨丽
ZHU Dan;LIU Fang;SONG Chen;YANG Li(School of Low Carbon Energy and Power Engineering,China University of Mining and Technology,Xuzhou 221116,Jiangsu,China)
出处
《低碳化学与化工》
CAS
北大核心
2024年第5期50-61,共12页
Low-Carbon Chemistry and Chemical Engineering
基金
国家自然科学基金(52176143)。
关键词
化学链燃烧
CO_(2)捕集
载氧体
磨损
chemical looping combustion
CO_(2)capture
oxygen carrier
attrition
