%0 Journal Article
%T 基材料储能辅助燃煤电站碳捕集研究进展         -     -
%A 吴水木
%A 李英杰
%A 马张珂
%J 洁净煤技术
%D 2019
%X 化石燃料大规模燃烧产生的CO2加剧了温室效应,钙循环技术不仅能实现低能耗碳捕集,也是热化学储能的重要方法之一。为应对全球气候变暖问题,可再生能源大规模开发与利用,太阳能具有大规模工业应用的广阔前景。然而,太阳辐射具有间歇性,热化学储能技术应运而生。笔者介绍了燃煤电站CaO储能辅助碳捕集系统以及太阳能热发电站基于钙循环的高温储能技术,分析了煅烧条件、材料颗粒粒径等因素对CaO基材料循环储能性能的影响,并介绍了提高CaO基材料储能活性和稳定性的多种方法:用机械掺混、化学燃烧合成等方式制备CaO/Al2O3、CaO/MgO、CaO/SiO2多种复合储能材料。结果表明,燃煤电站CaO储能系统可提高发电效率、减少机组煤耗量、实现CO2减排;CaO/CaCO3高温热化学系统储能密度高达3. 2 GJ/m3,储能循环稳定性高,能够实现能量长期无热损储存;惰性载体(Al2O3、MgO、SiO2)的加入可以提高CaO储热循环活性和稳定性。基于CaO基材料碳酸化/煅烧反应(钙循环)的高温热化学储能具有巨大应用前景。此外,分析了当前CaO基材料储能存在的问题以及研究难点,并对储能研究方向进行展望。目前CaO基材料储能循环活性降低,高效储能装置距离实际应用还有一定差距。CaO基储能材料制备应向高储能密度、高循环活性方向发展,整体发电效率提高是储能系统优化的关键。 Abstract:The greenhouse effect is aggravated by CO2 generated by large-scale combustion of fossil fuels.Calcium cycle technology can not only achieve low-cost CO2 capture,but also is one of the important methods of the thermochemical energy storage (TCES).In order to cope with the global warming problem,the renewable energy is large-scale developed and utilized,and the solar energy has broad prospects of large-scale industrial applications.However,the solar radiation is intermittent,the thermochemical energy storage technology emerges as the times require.The auxiliary CO2 capture system of CaO energy storage at coal-fired power stations and the high-temperature energy storage technology based on calcium cycle at solar thermal power stations were introduced.The influence factors including calcination conditions and particle sizes of materials on the cyclic energy storage performance of CaO-based materials were analyzed.In addition,different methods of the improvement of the heat storage performance of CaO-based materials were reviewed:the CaO/Al2O3、CaO/MgO、CaO/SiO2 composite energy storage materials are prepared by mechanical blending or chemical combustion synthesis.The results show that the CaO energy storage system at coal-fired power station can improve power generation efficiency,reduce consumption of coal,and achieve emission reduction of CO2.The energy storage density of CaO/CaCO3 high temperature thermochemical system is as high as 3.2 GJ/m3,which has high stability of energy storage cycle and can realize long-term energy storage without heat loss.The addition of inert carrier (Al2O3,MgO,SiO2) can improve the activity and stability of CaO heat cycle storage performance.The TCES based on carbonation/calcination reaction (calcium cycle) of CaO-based materials at high temperature has great application prospects.In addition,the existing problems and research difficulties of CaO-based energy storage materials were analyzed,and the research direction of energy storage was
%K CaO基材料
%K 热化学储能
%K 燃煤电站
%K 太阳能
%K 储能密度 CaO-based material
%K thermochemical energy storage
%K coal-fired power station
%K solar power
%K energy storage density
%U http://www.jjmjs.com.cn/WKD/WebPublication/paperDigest.aspx?paperID=c3b60efc-75fc-47a1-b1ba-4053daccab31