Superhydrophobic ceramic membrane coupled with a biphasic solvent for efficient CO_(2)capture  

作　　者：Kaili Xue Zhen Chen Xiaona Wu Heng Zhang Haiping Chen Junhua Li 

机构地区：[1]State Key Joint Laboratory of Environment Simulation and Pollution Control,School of Environment,Tsinghua University,Beijing,100084,China [2]Beijing Key Laboratory of Pollutant Monitoring and Control in Thermoelectric Production Process,School of Energy,Power and Mechanical Engineering,North China Electric Power University,Beijing,102206,China [3]MOE Key Laboratory of Resources and Environmental Systems Optimization,College of Environmental Science and Engineering,North China Electric Power University,Beijing,102206,China

出　　处：《Green Energy & Environment》2025年第4期834-844,共11页绿色能源与环境(英文版)

基　　金：supported by the National Key R&D Program of China(2023YFF0614301,2023YFC3707004,and 2018YFB0604302);Fundamental Research Funds for the Central Universities(No.2022MS041);National Natural Science Foundation of China(No.22106084);Tsinghua University Initiative Scientific Research Program(2023Z02JMP001).

摘　　要：An innovative strategy was proposed by integration of membrane contactor(MC)with biphasic solvent for efficient CO_(2) capture from flue gas.The accessible fly ash-based ceramic membrane(CM)underwent hydrophobic modification through silane grafting,followed by fluoroalkylsilane decoration,to prepare the superhydrophobic membrane(CSCM).The CSCM significantly improved resistance to wetting by the biphasic solvent,consisting of amine(DETA)and sulfolane(TMS).Morphological characterizations and chemical analysis revealed the notable enhancements in pore structure and hydrophobic chemical groups for the modified membrane.Predictions of wetting/bubbling behavior based on static wetting theory referred the liquid entry pressure(LEP)of CSCM increased by 20 kPa compared to pristine CM.Compared with traditional amine solvents,the biphasic solvent presented the expected phase separation.Performance experiments demonstrated that the CO_(2) capture efficiency of the biphasic solvent increased by 7%,and the electrical energy required for desorption decreased by 32%.The 60-h continuous testing and supplemental characterization of used membrane confirmed the excellent adaptability and durability of the CSCMs.This study provides a potential approach for accessing hydrophobic ceramic membranes and biphasic solvents for industrial CO_(2) capture.

关 键 词：Carbon capture Membrane contactor Hydrophobic modification Membrane wetting Biphasic solvent 

分 类 号：TQ028.8[化学工程]