Synthesis of highly reactive sorbent from industrial wastes and its CO_2 capture capacity  

基于钙基废弃物的高活性吸收剂合成及其循环捕集CO_2性能（英文）

作　　者：孙荣岳[1,2] 李英杰[1] 

机构地区：[1]山东大学能源与动力工程学院,济南250061 [2]南京工程学院能源与动力工程学院,南京211167

出　　处：《Journal of Southeast University(English Edition)》2015年第2期209-214,共6页东南大学学报（英文版）

基　　金：The National Natural Science Foundation of China(No.51376003)

摘　　要：A kind of industrial solid waste, i.e., carbide slag, was used as CaO precursor to synthesize CO2 sorbent. The highly reactive synthetic sorbent was prepared from carbide slag, aluminum nitrate hydrate and glycerol water solution by the combustion synthesis method. The results show that the synthetic sorbent exhibits a much higher CO2 capture capacity compared with carbide slag. The CO2 capture capacity and the carbonation conversion of the synthetic sorbent are 0. 38 g/g and 0. 70 after 50 cycles, which are 1.8 and 2. 1 times those of carbide slag. The average carbonation conversion and the CO2 capture efficiency of the synthetic sorbent are higher than those of carbide slag with the same sorbent flow ratios. The required sorbent flow ratios are lower for synthetic sorbent to achieve the same CO2 capture efficiency compared with carbide slag. With the same sorbent flow ratio and CO2 capture efficiency, the energy requirement in calciner for the synthetic sorbent is less than that for carbide slag.利用一种典型的钙基废弃物电石渣作为Ca O源合成CO2吸收剂.该高活性吸收剂由电石渣、九水硝酸铝和甘油水溶液经燃烧合成法合成.结果表明,该合成吸收剂表现出明显好于电石渣的CO2捕集性能.50次循环后,合成吸收剂的CO2吸收量和碳酸化转化率为0.38 g/g和0.70,分别是电石渣相同循环次数时的1.8和2.1倍.当吸收剂补充率相同时,合成吸收剂的平均碳酸化转化率和CO2捕集效率均高于电石渣.为取得相同的CO2捕集效率,合成吸收剂所需吸收剂的补充率小于电石渣.当吸收剂补充率和CO2捕集效率相同时,用合成吸收剂作为CO2吸收剂时煅烧炉内所需的能量小于用电石渣作为CO2吸收剂时所需能量.

关 键 词：carbide slag synthetic CO2 sorbent CO2 capture 

分 类 号：TQ534[化学工程—煤化学工程]