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[1]陈潇湘,熊 卓,余学海,等.不同锂源制备正硅酸锂及其CO2吸附特性[J].燃烧科学与技术,2018,(03):257-261.[doi:10.11715/rskxjs.R201705003]
 Chen Xiaoxiang,Xiong Zhuo,Yu Xuehai,et al.Synthesis and CO2 Performance of Lithium Orthosilicate Sorbents Prepared by Different Lithium Compounds[J].Journal of Combustion Science and Technology,2018,(03):257-261.[doi:10.11715/rskxjs.R201705003]
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不同锂源制备正硅酸锂及其CO2吸附特性()
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《燃烧科学与技术》[ISSN:1006-8740/CN:12-1240/TK]

卷:
期数:
2018年03
页码:
257-261
栏目:
出版日期:
2018-06-15

文章信息/Info

Title:
Synthesis and CO2 Performance of Lithium Orthosilicate Sorbents Prepared by Different Lithium Compounds
作者:
陈潇湘1熊 卓1余学海1 2赵永椿1张军营1郑楚光1
1. 华中科技大学能源与动力工程学院煤燃烧国家重点实验室,武汉 430074;2. 神华国华电力研究院,北京 100025
Author(s):
Chen Xiaoxiang1Xiong Zhuo1Yu Xuehai1 2Zhao Yongchun1Zhang Junying1Zheng Chuguang1
1. State Key Laboratory of Coal Combustion,College of Energy and Power Engineering,Huazhong University of Science and Technology,Wuhan 430074,China;2. Shenhua Guohua Electric Power Research Institute,Beijing 100025,China
关键词:
硅酸锂锂源CO2吸附/脱附循环
Keywords:
lithium orthosilicatelithium sourceCO2 sorbent/desorption cycles
分类号:
X773
DOI:
10.11715/rskxjs.R201705003
文献标志码:
A
摘要:
选取了3 种锂源化合物LiNO3、LiOH 和Li2CO3与石英在固相合成法下制备正硅酸锂(Li4SiO4).采用X射线衍射仪、环境扫描电子显微镜和热重分析仪对3 种锂源合成的Li4SiO4 进行了表征,并在固定床台架上进行了CO2 循环吸附/脱附的实验研究.结果表明,相比于Li2CO3,LiNO3 和LiOH 作为锂源降低了合成反应所需温度.在低浓度CO2(15%)气氛下,样品吸附量与颗粒微观形貌有直接关系.LN700 和LH700 原样颗粒呈多孔状,由更小颗粒团聚而成,二者初始吸附量较高,而经过15 次CO2吸附/脱附循环后,LN700 颗粒比表面积增大到原来的2.6 倍,虽孔隙塌陷,吸附效率没有明显降低;而LH700 颗粒比表面积大大降低,表面烧结,吸附量仅为初始值的20%,.LC800颗粒比表面积15 次循环前后略微降低,吸附量亦稍有降低.
Abstract:
Li4SiO4 sorbents were synthesized using quartz and three types of lithium compounds,i.e. LiNO3, LiOH and Li2CO3.The samples of Li4SiO4 sorbents were characterized by XRD,SEM and TG analyzer, followed by cyclic CO2 adsorption/desorption test on a fixed bed.The results show that LiNO3 and LiOH as starting materials require lower temperature for preparation than Li2CO3.The particles of LN700 and LH700 sorbents with porous texture and obvious agglomeration presented high initial adsorption capacities.After 15 CO2 sorption/desorption cycles,the adsorption efficiency of LN700 sample showed no obvious decrease while that of LH700 sample decreasing to 20%, of initial value,and that of LC800 sample underwent a slight decline.After the cycles,the pore of LN700 particles collapsed and the surface area increased to 2.6 times;the surface area of LH700 sample was greatly reduced with severe sintering;the surface area of LC800 sample only declined slightly.It can be concluded that under low CO2 concentration(15%,),the microstructure of sorbent particles could affect the capacity of sorbent directly.

相似文献/References:

[1]秦亚迪,陈潇湘,张军营.Ca 掺杂对硅酸锂吸收CO2性能的影响[J].燃烧科学与技术,2016,(05):459.[doi:10.11715/rskxjs.R201603035]
 Qin Yadi,Chen Xiaoxiang,Zhang Junying.Effect of Ca-Doping on CO2 Absorption of Li4,SiO4[J].Journal of Combustion Science and Technology,2016,(03):459.[doi:10.11715/rskxjs.R201603035]

备注/Memo

备注/Memo:
收稿日期:2017-05-04. 基金项目:国家重点基础研究发展计划(973计划)资助项目(2014CB238904);国家自然科学基金资助项目(51506066;51376074). 作者简介:陈潇湘(1989— ),女,博士研究生,xiaoxiangchen0314@gmail.com. 通讯作者:张军营,男,博士,教授,jyzhang@hust.edu.cn
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