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Chemcial Industry and Engineering 2013, Vol. 30 Issue (5) :11-15    DOI:
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CO2 Absorption Performance of Li4SiO4 Prepared from Coal-Kaolin
 LIU  Yu-Lan, DING  Tong, MA  Zhi, QI  Xiao-Zhou, ZHANG  Hui
(School of Chemical Engineering and Technology, Tianjin University, Tianjin Key Laboratory of Catalysis Science and Engineering, Tianjin 300072, China)

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Abstract Lithium orthosilicates (Li4SiO4) is a hightemperature CO2 sorbent. It separates CO2from gas mixture based on a chemical reaction. In this paper, we have prepared Kaolin-Li4SiO4 successfully. With silicon dioxide made from the waste residue of acid processing coalkaolin and lithium carbonate as raw materials, KaolinLi4SiO4 was prepared by high temperature solid-state reaction. The microscopic morphologies of absorbents were viewed by scanning electron microscopy(SEM). The samples were characterized by X-ray diffraction (XRD) patterns. The performance of CO2 absorption was measured with a thermogravimetric analyzer (DTA-TG). The result indicated that the material exhibited good ability to absorb CO2, the biggest absorption capacity was up to 31.07% (mass fraction). Compared with the Li4SiO4 prepared with commercial SiO2 as silica source, the CO2 absorption of Kaolinlithium silicate was faster at low temperature. So Kaolinlithium silicate has a significant advantage of CO2 absorption at low temperature.
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Articles by authors
LIU Yu-Lan
DING Tong
MA Zhi
QI Xiao-Zhou
ZHANG Hui
Keywordscoal-kaolin   acid processing   solid-state reaction   lithium silicate   carbon dioxide     
Received 2012-11-05;
Fund:

化学工程联合国家重点实验室开放课题(SKLCHE09A03),天津大学自主创新基金(2010XJ0047)。

Corresponding Authors: 丁彤,电话:(022)27401451,E-mail:d_tong@tju.edu.cn。     Email: d_tong@tju.edu.cn
About author: 刘玉兰(1986-),女,硕士研究生,主要从事固体吸附剂吸附CO2的研究。
Cite this article:   
LIU Yu-Lan, DING Tong, MA Zhi, QI Xiao-Zhou, ZHANG Hui.CO2 Absorption Performance of Li4SiO4 Prepared from Coal-Kaolin[J]  Chemcial Industry and Engineering, 2013,V30(5): 11-15
Copyright 2010 by Chemcial Industry and Engineering