摘要
在分析纯CaCO_3中浸渍添加Cl,利用双固定床反应器和热重分析仪研究了Cl对CaCO_3循环捕集CO_2性能的影响。结果表明:Cl/Ca摩尔比大于0.25:100时,随Cl/Ca摩尔比继续增加,吸收剂循环碳酸化转化率迅速降低.当Cl/Ca摩尔比为4:100时,经5次循环后吸收剂基本失去循环捕集CO_2活性.吸收剂化学反应控制阶段的碳酸化速率和碳酸化转化率均随Cl/Ca摩尔比增加而降低,Cl对吸收剂扩散控制阶段碳酸化速率影响不大.添加Cl后,吸收剂烧结加剧,孔隙坍塌堵塞更加严重,比孔容和比表面积均减小,导致吸收剂循环碳酸化转化率降低。
CaCO3 was doped with chlorine by wet impregnation. The effect of Cl on CO2 capture capacity of CaCO3 was investigated in a TGA and a dual-fixed bed reactor. The results show that when Cl/Ca molar ratio is greater than 0.25：100, the cyclic carbonation conversions of the sorbents decrease dramatically with increasing the Cl/Ca molar ratio. The sorbent is almost inactive for CO2 capture after 5 cycles when the Cl/Ca molar ratio is 4：100. The carbonation rates and conversions of the sorbent during the chemical reaction controlled stage decrease with increasing the C1/Ca molar ratio. Cl has little effect on the carbonation rates of the sorbent during diffusion controlled stage. The Cl-doped sorbents show more pronounced sintering during cyclic calcinations, and the blockage of the pores is more serious. The pore volume and surface area of the sorbent decrease with increasing Cl/Ca molar ratio, which leads to the decay of the carbonation conversion.
出处
《工程热物理学报》
EI
CAS
CSCD
北大核心
2014年第1期204-207,共4页
Journal of Engineering Thermophysics
基金
国家自然科学基金资助项目(No.51006064)
山东大学自主创新基金资助项目(No.2012TS053)
关键词
钙循环法
CL
煅烧
碳酸化
CO2捕集
calcium looping process
C1
calcination/carbonation
CO2 capture
