为提高Li2ZrO3的稳定性及吸附速率,采用柠檬酸-乙二醇络合法,以硝酸锂、硝酸氧锆为原料制备了纯Li2ZrO3超细晶体粉末.利用综合热分析仪分析了前躯体的热分解过程,采用X射线衍射光谱、扫描电子显微镜、热重-差示扫描量热分析等对Li2ZrO3的前驱体及Li2ZrO3晶体粉末进行了表征,研究了焙烧温度和时间对其四方晶粒结构形成的影响.结果表明：在800℃下焙烧150min,制备出的Li2ZrO3超细晶体粉末具有规整、均匀的四方晶相;Li2ZrO3晶体粉末在程序升温和高温恒温状态下吸附CO2的最佳温度为600℃,在此温度下,当CO2流量为45 cm^3/min时,90 min内样品吸附CO2的量可达吸附剂质量的23.7%,吸附速率较快.文中还建立了吸附模型的新解法,并利用Li2ZrO3吸附CO2的数据进行模拟验证,模拟结果与实验数据吻合较好.

In order to improve the stability and adsorption rate of lithium zirconate（Li2ZrO3）,fine powders of pure Li2ZrO3 were prepared by means of citric acid-ethylene glycol complexation,with lithium nitrate and zirconyl nitrate as the starting materials.Then,the thermal decomposition of the precursor was analyzed using a comprehensive thermal analyzer,and the precursor and the Li2ZrO3 powders were characterized by means of XRD,SEM and TG-DSC.Moreover,the effects of calcination temperature and time on the formation of tetragonal crystalline grains were analyzed.The results indicate that the crystal phase of the Li2ZrO3 powders synthesized at 800 ℃ for 150 min is te-tragonal,holonomic and homogeneous,that the optimal temperature for CO2 adsorption by the powders under programmed heating and constant high-temperature status is 600 ℃,at which the 90 min adsorption capacity reaches 23.7% of the lithium zirconate mass when CO2 flows at a rate of 45 cm3/min.In addition,a new solution to the proposed adsorption model is also presented in this paper,which is verified with the adsorption data by simulation,and the simulated results accord well with the experimental ones.