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影响锆酸锂吸收CO2循环性能的一些因素

Some Influencing Factor for CO2 Absorption Cycle-Ability of Lithium Zirconate

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【作者】 王银杰； 其鲁； 江卫军；

【Author】 WANG Yinjie 2) QI Lu 3) JIANG Weijun 3) ( 2) National Laboratory of Flame Retarded Materials, Beijing Institute of Technology, Beijing, 100081; 3) Department of Applied Chemistry College of Chemistry & Molecular Engineering Peking University, Beijing, 100871)

【机构】 北京理工大学阻燃材料研究国家专业实验室； 北京大学化学与分子工程学院应用化学系； 北京大学化学与分子工程学院应用化学系 北京； 100081； 北京； 100871；

【摘要】 以纳米级单斜相ZrO2为反应物,按照n（Li2CO3）∶n（ZrO2）∶n（K2CO3）=1∶1∶0.03的比例制备了可在高温460650℃下直接吸收CO2的锆酸锂材料。使用热重分析仪（TG）进行了循环吸收CO2性能的研究,采用扫描电镜（SEM）、X-射线衍射仪（XRD）对再次合成的材料分别进行了形貌、结构的分析。实验结果表明,在吸收CO2后材料的再次合成过程中合成温度及空气流量影响材料吸收CO2的循环性能,在再次合成温度为750℃,空气流量为100mL/min的条件下,合成的材料具有良好的循环吸收CO2的性能。

【Abstract】 With nanometer-sized monoclinic ZrO2, lithium carbonate, and potassium carbonate as starting materials, according to Li2CO3∶ZrO2∶K2CO3=1∶1∶0.03, potassium-doped lithium zirconate absorbents were prepared by high-temperature solid-state reaction. Their CO2-absorption cycle-properties were measured with a thermogravimetric analyzer. The crystal structure of the re-prepared absorbents was studied by comparison of their XRD patterns. The microscopic morphologies of re-prepared absorbents were viewed by a sanning electron microscopy. The experimental results showed,after absorption of CO2, the material could be re-prepared, whose performance of absorbing CO2 for the second time is affected by the temperature and air flux during re-preparation. When the temperature is 750?℃ and the air flux is 100?mL/min, the re-prepared material has good cycle ability to absorb CO2.

【关键词】 锆酸锂； 吸收； CO2； 热重分析仪；
【Key words】 lithium zirconate； absorption； CO2；