Na掺杂对锆酸锂吸收CO_2性能的影响  

Effect of Na-Doping on Properties of Lithium Zirconate as CO_2-absorbent

作　　者：王银杰[1] 其鲁[2] 江卫军[2] 

机构地区：[1]北京理工大学材料科学与工程学院,北京100081 [2]北京大学化学与分子工程学院应用化学系,北京100871

出　　处：《无机化学学报》2006年第6期1118-1122,共5页Chinese Journal of Inorganic Chemistry

基　　金：中信基金资助项目。

摘　　要：By using Li2CO3, ZrO2, and Na2CO3 as starting materials, sodium-doped Li2(1-x)Na2xZrO3 absorbents were prepared by high-temperature solid-state reaction. The crystal structure of the lithium zirconate material was analyzed using a X-ray powder diffractometer (XRD), the microstructure of all the samples was observed using the method of scanning electron microscopy (SEM) and the CO2-absorption ability of the lithium zirconate material was studied using a thermogravimetric analyzer (TG). It was found that Li2(1-x)Na2xZrO3 absorbent with x=0.02 possesses the best performance. As much as (25 ± 0.4)% (wt) of CO2 was absorbed by such an absorbent in an atmosphere consisting of 20% (wt) CO2 and 80% (wt) air at 500 ℃ within 3 h. After 10 cycles of absorption-desorption this absorbent lost only 0.9% of its CO2-absorption capacity. No remarkable change in particle size and pH was observed.By using Li2CO3, ZrO2, and Na2CO3 as starting materials, sodium-doped Li2（1-x）Na2rZrO3 absorbents were prepared by high-temperature solid-state reaction. The crystal structure of the lithium zirconate material was analyzed using a X-ray powder diffractometer （XRD）, the microstructure of all the samples was observed using the method of scanning electron microscopy （SEM） and the CO2-absorption ability of the lithium zirconate material was studied using a thermogravimetric analyzer （TG）. It was found that Li2（1-x）Na2xZrO3 absorbent with x=0.02 possesses the best performance. As much as （25 ± 0.4）% （wt） of CO2 was absorbed by such an absorbent in an atmosphere consisting of 20% （wt） CO2 and 80% （wt） air at 500 ℃ within 3 h. After 10 cycles of absorption-desorption this absorbent lost only 0.9% of its CO2-absorption capacity. No remarkable change in particle size and pH was observed.

关 键 词：Na元素 掺杂 锆酸锂 吸收 CO2 

分 类 号：O614.111[理学—无机化学] O614.412[理学—化学]