锆酸锂的制备、表征及吸附CO2的模拟

doi:10.3969/j.issn.1000-565X.2011.01.009

华南理工大学学报（自然科学版） ›› 2011, Vol. 39 ›› Issue (1): 48-52,62.doi: 10.3969/j.issn.1000-565X.2011.01.009

锆酸锂的制备、表征及吸附CO2的模拟

袁文辉¹ 梁杰¹ 李莉²

1．华南理工大学化学与化工学院，广东广州510640；2．华南理工大学环境科学与工程学院，广东广州51000

收稿日期:2010-07-07 修回日期:2010-08-16 出版日期:2011-01-25 发布日期:2010-12-01
通信作者: 袁文辉(1969一)，男，博士，副教授，主要从事化工吸附分离和膜催化分离等研究 E-mail:cewhyuan@scut.edu.cn
作者简介:袁文辉(1969一)，男，博士，副教授，主要从事化工吸附分离和膜催化分离等研究
基金资助:
广东省自然科学基金资助项目(06025657)

Synthesis,Characterization and CO_2 Adsorption Simulation of Lithium Zirconate

Yuan Wen-hui¹ Liang Jie¹ Li Li²

1. The south China university of technology and engineering college chemistry, guangdong guangzhou 510640; 2. South China university of technology, environmental science and engineering college, guangdong guangzhou 51000

Received:2010-07-07 Revised:2010-08-16 Online:2011-01-25 Published:2010-12-01
Contact: 袁文辉(1969一)，男，博士，副教授，主要从事化工吸附分离和膜催化分离等研究 E-mail:cewhyuan@scut.edu.cn
About author:袁文辉(1969一)，男，博士，副教授，主要从事化工吸附分离和膜催化分离等研究
Supported by:
广东省自然科学基金资助项目(06025657)

摘要/Abstract

摘要： 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.

关键词: 柠檬酸-乙二醇络合法, 锆酸锂, 吸附速率, 吸附模型

Abstract:

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.

Key words: citric acid-ethylene glycol complexation method, Li2ZrO3, sorption rate, sorption model

袁文辉梁杰李莉. 锆酸锂的制备、表征及吸附CO2的模拟[J]. 华南理工大学学报（自然科学版）, 2011, 39(1): 48-52,62.

Yuan Wen-hui Liang Jie Li Li. Synthesis,Characterization and CO_2 Adsorption Simulation of Lithium Zirconate[J]. Journal of South China University of Technology (Natural Science Edition), 2011, 39(1): 48-52,62.

锆酸锂的制备、表征及吸附CO2的模拟

Synthesis,Characterization and CO_2 Adsorption Simulation of Lithium Zirconate

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