摘要
针对多循环反应过程中钙基吸收剂的CO2吸收能力随循环次数增加而迅速衰减的问题,采用溶胶-凝胶燃烧法,在不同前驱体溶液pH值条件下制备CaO/MgO吸收剂,并在卧式固定床反应器上进行了20次循环的煅烧/碳化试验,对其吸收CO2的活性及循环反应稳定性进行了研究.结果表明:采用溶胶-凝胶法合成的CaO/MgO吸收剂与干物理混合法及湿化学法合成的相比,具有更好的CO2吸收性能;对于采用尿素溶胶-凝胶燃烧法合成的CaO/MgO吸收剂,前驱体溶液pH值越小,制备的CaO/MgO吸收剂颗粒越小,比表面积越大,CO2吸收能力越高.
Aiming at the problem that the capture capacity of CaO-based absorbent reduces rapidly after multiple cycles,a number of CaO/MgO sorbents were synthesized using sol-gel combustion method under various pH conditions of precursor,of which the activity and stability in cyclic reaction of CO2 capture were investigated by 20 cycles of carbonation/calcination reaction experiment in a fixed bed reactor.Results show that the capture capability of CaO/MgO sorbent prepared by sol-gel combustion method is stronger than that prepared by dry physical mixing and wet chemical synthesis method.For CaO/MgO sorbents prepared by urea sol-gel combustion method,the less the pH value of precursor,the smaller the particle size and the larger the specific surface urea is,the stronger the absorbing capability will be.
出处
《动力工程学报》
CAS
CSCD
北大核心
2012年第2期147-151,共5页
Journal of Chinese Society of Power Engineering
基金
国家重点基础研究发展计划(973计划)资助项目(2011CB707301)
教育部留学回国人员科研启动基金资助项目
