基于钙基吸收剂循环煅烧/碳酸化反应捕集CO_2的试验  

Experiment of CO_2 Capture Based on Ca-based Sorbents Cyclic Calcination/carbonation Reaction

作　　者：李辉[1,2] 杨文斌[1] 段永华[1] 闵永刚[1,2] 

机构地区：[1]西安建筑科技大学材料与矿资学院,西安710055 [2]陕西循环经济工程技术院,西安710055

出　　处：《硅酸盐通报》2013年第2期356-362,共7页Bulletin of the Chinese Ceramic Society

基　　金：国家自然科学基金项目(51274159);陕西省重大科技创新项目(2012zk06-2)

摘　　要：利用钙基吸收剂循环煅烧/碳酸化反应(CCCR)吸收CO2是一种新型、廉价、有效的CO2捕集方法。采用热重分析仪研究了吸收剂的矿物组成、颗粒粒径、煅烧温度和碳酸化温度对CCCR快速反应阶段吸收剂循环碳酸化率(XN)的影响。结果表明:吸收剂的碳酸化反应由快速化学反应控制阶段、过渡阶段和缓慢产物层扩散控制阶段组成;白云石具有良好的抗烧结能力,白云石的XN高于石灰石;随着颗粒粒径的增大,吸收剂的XN逐渐降低;当煅烧温度超过950℃时,随着循环反应次数的增加,吸收剂的XN严重降低;吸收剂在725℃碳酸化温度时的XN最高。The Cyclic Calcination/Carbonation Reaction （CCCR） of Ca-based sorbents is a novel, inexpensive and efficient method for CO~ capture. The effects of Ca-based sorbent mineral composition, particle size （ DP）, carbonation temperature （Tear） and calcination temperature （Teal） on the cyclic aid of thermogravimetric analyzer. The results showed that the carbonation reaction of the sorbents fell into three successive phases , including rapid chemical reaction control phase, transition phase and slow product layer diffusion control phase. Compared with limestone, dolomite possessed of better anti- sintering capability and higher Xn. The carbonation conversion （XN ） for Ca-based sorbents gradually decreased with increasing particle size. When Tcal was higher than 950℃, XN declined remarkably with the increase of cycle index. The highest XN was obtained at 725 ℃.

关 键 词：钙基吸收剂 CO2捕集 碳酸化特性 

分 类 号：TQ201[化学工程—有机化工]