CAS OpenIR  > 生化工程国家重点实验室
Separation and concentration of ionic liquid aqueous solution by vacuum membrane distillation
Wu, Huanhuan1,2; Shen, Fei1; Wang, Junfeng1; Luo, Jianquan1; Liu, Lixia1,2; Khan, Rashid1,2; Wan, Yinhua1
2016-11-15
Source PublicationJOURNAL OF MEMBRANE SCIENCE
ISSN0376-7388
Volume518Issue:NOVPages:216-228
Abstract

Due to the high cost of ionic liquids (ILs), how to economically recycle them from aqueous solutions is one of the critical issues for their large-scale applications. In this work, vacuum membrane distillation (VMD) technique was proposed to separate and concentrate the 1-butyl-3-methylimidazolium chloride ([13mim]CI) aqueous solutions at high concentration (e.g. >= 20 wt%), where a polyacrylonitrile-based (PAN-based) hydrophobic membrane was prepared and used. The chemical resistance and VMD separation performance of the PAN-based membrane were estimated. The results showed that the homemade membrane possessed good chemical resistance to several kinds of media and favorable VMD flux and rejection. Four different groups of VMD concentration processes with intermittent operation mode were then carried out to separately concentrate a 20 wt% [Bmim]CI solution. The concentration process, membrane fouling and wetting, as well as cleaning strategy were compared and discussed. It was found that for the hydrophobic PAN-based membrane, surface hydrophilization resulted from surface chemistry rearrangement happened especially at high feed temperature, which might aggravate the adsorption of [Bmim]CI on membrane surface. Membrane top layer wetting would occur due to the synergistic effect of surface hydrophilization and deposition of [Bmim]CI, which not only induced the reductions of the membrane flux and rejection, but also further caused internal pore wetting. Therefore, the fouling mechanism during the VMD concentration might be divided into three stages, surface deposition, top layer wetting and internal pore wetting. Timely cleaning (i.e. before surface wetting) could effectively prevent the fouling deterioration (i.e. from surface deposition to surface wetting) and improve the VMD concentration process, resulting in a high flux recovery over 95%. Under the optimal conditions, a final [Bmim]CI concentration as high as 65.5 wt% with a total [Bmim]CI recovery over 99.5% was achieved, indicating that VMD was a promising candidate for concentrating ILs aqueous solutions. (C) 2016 Elsevier Ltd. All rights reserved.

KeywordIonic Liquid Membrane Distillation Concentration Fouling Wetting
SubtypeArticle
WOS HeadingsScience & Technology ; Technology ; Physical Sciences
DOI10.1016/j.memsci.2016.07.017
Indexed BySCI
Language英语
WOS KeywordLIGNOCELLULOSIC BIOMASS ; PLASMA POLYMERIZATION ; COMPOSITE MEMBRANES ; SURFACE DYNAMICS ; WATER ; RECOVERY ; TEMPERATURE ; ELECTRODIALYSIS ; NANOFILTRATION ; DISSOLUTION
WOS Research AreaEngineering ; Polymer Science
WOS SubjectEngineering, Chemical ; Polymer Science
Funding OrganizationSolar Energy Initiative of the Chinese Academy of Sciences(KGCX2-YW-380) ; National High-Tech R&D Program of China(2012AA021202 ; 2014AA021005)
WOS IDWOS:000382254500022
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/21439
Collection生化工程国家重点实验室
Affiliation1.Chinese Acad Sci, Inst Proc Engn, State Key Lab Biochem Engn, Beijing 100190, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
Wu, Huanhuan,Shen, Fei,Wang, Junfeng,et al. Separation and concentration of ionic liquid aqueous solution by vacuum membrane distillation[J]. JOURNAL OF MEMBRANE SCIENCE,2016,518(NOV):216-228.
APA Wu, Huanhuan.,Shen, Fei.,Wang, Junfeng.,Luo, Jianquan.,Liu, Lixia.,...&Wan, Yinhua.(2016).Separation and concentration of ionic liquid aqueous solution by vacuum membrane distillation.JOURNAL OF MEMBRANE SCIENCE,518(NOV),216-228.
MLA Wu, Huanhuan,et al."Separation and concentration of ionic liquid aqueous solution by vacuum membrane distillation".JOURNAL OF MEMBRANE SCIENCE 518.NOV(2016):216-228.
Files in This Item:
File Name/Size DocType Version Access License
Separation and conce(4668KB)期刊论文出版稿限制开放CC BY-NC-SAApplication Full Text
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Wu, Huanhuan]'s Articles
[Shen, Fei]'s Articles
[Wang, Junfeng]'s Articles
Baidu academic
Similar articles in Baidu academic
[Wu, Huanhuan]'s Articles
[Shen, Fei]'s Articles
[Wang, Junfeng]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Wu, Huanhuan]'s Articles
[Shen, Fei]'s Articles
[Wang, Junfeng]'s Articles
Terms of Use
No data!
Social Bookmark/Share
All comments (0)
No comment.
 

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.