聚醚P123和四乙烯五胺双功能化Fe-Zr的CO_(2)吸附性能  

CO_(2) adsorption performance over Fe-Zr functionalized with both polyether P123 and tetraethylenepentamine

作　　者：杨泛明 黎丽君 肖浪 廖敏 张可意 谭伟石 贺国文 YANG Fan-ming;LI Li-jun;XIAO Lang;LIAO Min;ZHANG Ke-yi;TAN Wei-shi;HE Guo-wen(College of Materials and Chemical Engineering,Hunan City University,Yiyang 413000,Hunan,China;All-Solid-State Energy Storage Materials and Devices Key Laboratory of Hunan Province,Hunan City University,Yiyang 413000,Hunan,China)

机构地区：[1]湖南城市学院材料与化学工程学院,湖南益阳413000 [2]湖南城市学院全固态储能材料与器件湖南省重点实验室,湖南益阳413000

出　　处：《材料工程》2021年第9期158-166,共9页Journal of Materials Engineering

基　　金：湖南省自然科学基金项目(2019JJ50026,2017JJ2018);湖南省教育厅科学研究项目(18B447);湖南省教育厅重点研究项目(29A085);全固态储能材料与器件湖南省重点实验室开放项目(2017TP1024)。

摘　　要：利用聚醚P123对双金属材料Fe-Zr进行改性合成介孔材料Fe-Zr(P),再利用四乙烯五胺(TETA)对Fe-Zr(P)进行功能化制得TEPA(n)/Fe-Zr(P)。采用X射线衍射、X射线光电子能谱、红外光谱、N_(2)吸附-脱附、热重分析等技术对材料结构和热稳定性进行表征,并对CO_(2)吸附性能进行测试。结果表明:P123存在于载体孔道内部;利用TETA对Fe-Zr(P)进行功能化,通过N与Zr配位,从而固载于Fe-Zr(P)表面;温度低于182℃时,TEPA(n)/Fe-Zr(P)保持稳定;TEPA(n)/Fe-Zr(P)中羟基和氨基同时与CO_(2)反应,产生化学吸附,从而提高化学吸附量和N利用率;TEPA质量分数为30%,温度为75℃,气体流速为10 mL/min时,TEPA(30)/Fe-Zr(P)的吸附量可达211.3 mg/g,N利用率为62.7%。循环20次,CO_(2)吸附量保持稳定。A mesoporous material of Fe-Zr(P)was synthesized by modifying the bimetallic material of Fe-Zr with polyether P123.Then,TEPA(n)/Fe-Zr(P)was prepared by modifying Fe-Zr(P)with tetraethylenepentamine(TEPA).X-ray diffraction,infrared spectroscopy,X-ray photoelectron spectroscopy,N_(2) adsorption-desorption and thermogravimetric analysis were used to analyze the structure and thermal stability of the synthesized materials.The results show that P123 is remained in the pore channels of the support.Besides,TEPA was introduced to the surface of Fe-Zr(P)through the coordination between N and Zr species.The adsorbents filled with P123 and TEPA keep stable when the temperature is less than 182℃.In addition,the adsorbents exhibit good CO_(2) adsorption performance in a stream of 5%CO_(2) concentration.Over TEPA(n)/Fe-Zr(P),both of the hydroxyl and amine groups react with CO_(2),leading to the occurrence of CO_(2) chemical adsorption and the enhancement of adsorption capacity and N utilization.When the mass fraction of TEPA is 30%,a remarkable adsorption capacity of 211.3 mg/g and the utilization of N species of 62.7% are achieved at 75℃in a stream of 10 mL/min.After 20 cycles of adsorption-desorption,the adsorption capacity keeps stable.

关 键 词：Fe-Zr P123 四乙烯五胺 CO_(2) 吸附 

分 类 号：X511[环境科学与工程—环境工程]