负载型钾基CO_2吸收剂的结构表征和碳酸化反应特性  

Structure and carbonation characteristics of dry potassium-based supported sorbent for CO_2 capture

作　　者：赵传文[1] 陈晓平[1] 赵长遂[1] 

机构地区：[1]东南大学能源与环境学院,江苏南京210096

出　　处：《化工学报》2009年第7期1800-1805,共6页CIESC Journal

基　　金：国家自然科学基金项目(50876021);国家重点基础研究发展计划项目(2006CB705806);江苏省普通高校研究生科研创新计划项目(CX08B141Z);东南大学优秀博士学位论文基金项目(YBJJ0825)~~

摘　　要：The structure identification and carbonation characteristics of several potassium-based supported sorbents for CO2 capture were investigated with TGA,XRD,XRF,SEM and N2 adsorption method.Potassium-based sorbents were prepared by impregnation with potassium carbonate on supports,such as cocoanut activated charcoal(AC1),coal active carbon(AC2),silica gel(SG)and diatomite(DT)using the iso-volume impregnation method.The results showed that the K2CO3 loading amounts of AC1,AC2,SG and DT were 24.1%,22.5%,21.7% and 19.1% respectively.The surface area and pore volume of K2CO3/AC1 and K2CO3/AC2 were larger than others.In contrast,those of K2CO3/DT were small.For K2CO3/SG,pore volume was large but surface area was small.K2CO3/AC1 and K2CO3/AC2 showed excellent carbonation capacity.However,the carbonation capacities of K2CO3/SG and K2CO3/DT were low.The difference in carbonation capacity of those sorbents were attributed to the difference in pore structure,leading to different supported sorbents.The structure identification and carbonation characteristics of several potassium-based supportecl sorbents for CO2 capture were investigated with TGA, XRD, XRF, SEM and N2 adsorption method. Potassium-based sorbents were prepared by impregnation with potassium carbonate on supports, such as cocoanut activated charcoal （AC1）, coal active carbon （AC2）, silica gel （SG） and diatomite （DT） using the iso-volume impregnation method. The results showed that the K2COs loading amounts of AC1, AC2, SG and DT were 24.1%, 22.5%, 21.7% and 19.1% respectively. The surface area and pore volume of K2CO3/AC1 and K2CO3/AC2 were larger than others. In contrast, those of K2CO3/DT were small. For K2CO3/SG, pore volume was large but surface area was small. K2CO3/AC1 and K2CO3/ AC2 showed excellent carbonation capacity. However, the carbonation capacities of K2CO3/SG and K2CO3/DT were low. The difference in carbonation capacity of those sorbents were attributed to the difference in pore structure, leading to different supported sorbents.

关 键 词：CO2 捕集 钾基吸收剂 碳酸化反应 孔隙结构 

分 类 号：TQ534.9[化学工程—煤化学工程] TD775[矿业工程—矿井通风与安全]