采用理想吸附溶液理论和维里方程对MAF stu-1(Zn/Cd)吸附CO_(2)的计算研究  

Study on CO_(2)Adsorption by MAF stu-1(Zn/Cd)Using Ideal Adsorption Solution Theory and the Virial Equation

作　　者：管信毅 魏小娟 郭丹 王胜平[1,2] Guan Xinyi;Wei Xiaojuan;Guo Dan;Wang Shengping(School of Chemical Engineering and Technology,Tianjin University,Tianjin 300072,China;School of Chemistry and Chemical Engineering,Ningxia University,Yinchuan 750021,China)

机构地区：[1]天津大学化工学院,天津300072 [2]宁夏大学化学化工学院,宁夏银川750021

出　　处：《宁夏大学学报（自然科学版）》2024年第4期372-378,共7页Journal of Ningxia University(Natural Science Edition)

基　　金：国家重点研发计划资助项目(2022YFB4101700)。

摘　　要：新型双金属MAF stu-1(Zn/Cd))吸附剂具有较好的CO_(2)吸附性能及循环稳定性,其CO_(2)吸附容量最大可达93 cm^(3)/g,但缺乏该吸附剂对于非纯CO_(2)二元混合气的分离性能和再生性能的研究.采用理想吸附溶液理论和维里方程对金属Cd改性后吸附剂MAF stu-1的混合气体分离性能和脱附再生性能进行拟合计算,结果表明,MAF stu-1(w(Cd)=5%)吸附剂的CO_(2)吸附热约为36 kJ/mol,远小于工业上CO_(2)吸附剂;且当V(CO_(2))∶V(N_(2))=15∶85时,该吸附剂对CO_(2)/N_(2)的吸附选择性达134,较未改性前MAF stu-1(MOF)吸附剂的吸附选择性提高14.5%.通过理想吸附溶液理论和维里方程对金属Cd改性吸附剂MAF stu-1的分离性能和脱附再生性能进行拟合计算,可为吸附剂MAF stu-1(w(Cd)=5%)的高吸附性能研究提供理论依据.The novel bimetallic MAF stu-1(Zn/Cd)adsorbent demonstrates excellent CO_(2)adsorption performance and cyclic stability,with a maximum CO_(2)adsorption capacity of 93 cm^(3)/g.However,its separation and regeneration performance for binary mixtures containing impure CO_(2)remains under-explored.Fitting calculations using Ideal Adsorption Solution Theory(IAST)and the Virial Equation on the Cd-modified adsorbent show that MAF stu-1(5%Cd)has a CO_(2)adsorption enthalpy of about 36 kJ/mol,which is much lower than that of industrial CO_(2)capture materials.Furthermore,the CO_(2)/N_(2)(V/V=15∶85)separation factor reaches 134,representing a 14.5%improvement compared to the unmodified MOF.This study aims to provide theoretical support for the high adsorption performance of MAF stu-1(5%Cd)through its separation and regeneration performance fitting calculations using Ideal Adsorption Solution Theory and the Virial Equation.

关 键 词：理想吸附溶液理论 维里方程 CO_(2)吸附 MAF stu-1 

分 类 号：TQ424.3[化学工程]