Effect of K_(2)CO_(3) doping on CO_(2) sorption performance of silicate lithium-based sorbent prepared from citric acid treated sediment  

作　　者：Junya Wang Kai Chen Yi Wang Jiuming Lei Abdullah Alsubaie Ping Ning Shikun Wen Taiping Zhang Abdulraheem S.AAlmalki AAlhadhrami Zhiping Lin Hassan Algadi Zhanhu Guo 

机构地区：[1]Faculty of Environmental Science and Engineering,Kunming University of Science and Technology,Kunming 650500,China [2]Ecological Environment Monitoring Station,Linxiang Branch,Lincang Municipal Bureau of Ecology and Environment,Lincang 677000,China [3]Department of Physics,College of Khurma,Taif University,P.O.Box 11099,Taif 21944,Saudi Arabia [4]Department of Chemistry,Faculty of Science,Taif University,P.O.Box 11099,Taif 21944,Saudi Arabia [5]Integrated Composites Laboratory(ICL),Department of Chemical and Bimolecular Engineering,University of Tennessee,Knoxville,TN 37996,United States [6]Department of Electrical Engineering,Faculty of Engineering,Najran University,P.O.Box 1988,Najran 11001,Saudi Arabia [7]College of Materials Science and Engineering,Taizhou University,Taizhou 318000,China

出　　处：《Chinese Journal of Chemical Engineering》2022年第11期10-20,共11页中国化学工程学报（英文版）

基　　金：the financial support from National Natural Science Foundation of China(21868015,51802135);the Applied Basic Research Programs of Yunnan Province(140520210057);Taif University Researchers Supporting Project number(TURSP-2020/163);Taif University,Taif,Saudi Arabia。

摘　　要：In this paper,a low-cost and environmental-friendly leaching agent citric acid(C_(6)H_(8)O_(7))was used to treat the sediment of Dianchi Lake(SDL)to synthesize lithium silicate(Li_(4)SiO_(4))based CO_(2)sorbent.The results were compared with that treated with strong acid.Moreover,the effects of preparation conditions,sorption conditions and desorption conditions on the CO_(2)sorption performance of prepared Li_(4)SiO_(4)were systematically studied.Under optimal conditions,the Li_(4)SiO_(4)sorbent was successfully synthesized and its CO_(2)sorption capacity reached 31.37%(mass),which is much higher than that synthesized from SDL treated with strong acid.It is speculated that the presence of some elements after C_(6)H_(8)O_(7)treatment may promote the sorption of synthetic Li_(4)SiO_(4)to CO_(2).In addition,after doping with K_(2)CO_(3),the CO_(2)uptake increases from the original 12.02%and 22.12%to 23.96%and 32.41%(mass)under the 20%and 50%CO_(2)partial pressure,respectively.More importantly,after doping K_(2)CO_(3),the synthesized Li_(4)SiO_(4)has a high cyclic stability under the low CO_(2)partial pressure.

关 键 词：CO_(2)sorbents Li_(4)SiO_(4) SEDIMENT Citric acid Doped with K_(2)CO_(3) 

分 类 号：TQ424[化学工程] X701[环境科学与工程—环境工程]