Osmotic heat engine using thermally responsive ionic liquids

Handle URI:
http://hdl.handle.net/10754/625227
Title:
Osmotic heat engine using thermally responsive ionic liquids
Authors:
Zhong, Yujiang ( 0000-0002-2652-780X ) ; Wang, Xinbo; Feng, Xiaoshuang; Telalovic, Selvedin; Gnanou, Yves ( 0000-0001-6253-7856 ) ; Huang, Kuo-Wei ( 0000-0003-1900-2658 ) ; Hu, Xiao Matthew; Lai, Zhiping ( 0000-0001-9555-6009 )
Abstract:
The osmotic heat engine (OHE) is a promising technology for converting low grade heat to electricity. Most of the existing studies have focused on thermolytic salt systems. Herein, for the first time, we proposed to use thermally responsive ionic liquids (TRIL) that have either an upper critical solution temperature (UCST) or lower critical solution temperature (LCST) type of phase behavior as novel thermolytic osmotic agents. Closed-loop TRIL-OHEs were designed based on these unique phase behaviors to convert low grade heat to work or electricity. Experimental studies using two UCST-type TRILs, protonated betaine bis(trifluoromethyl sulfonyl)imide ([Hbet][Tf2N]) and choline bis(trifluoromethylsulfonyl)imide ([Choline][Tf2N]) showed that (1) the specific energy of the TRIL-OHE system could reach as high as 4.0 times that of the seawater and river water system, (2) the power density measured from a commercial FO membrane reached up to 2.3 W/m2, and (3) the overall energy efficiency reached up to 2.6% or 18% of the Carnot efficiency at no heat recovery and up to 10.5% or 71% of the Carnet efficiency at 70% heat recovery. All of these results clearly demonstrated the great potential of using TRILs as novel osmotic agents to design high efficient OHEs for recovery of low grade thermal energy to work or electricity.
KAUST Department:
Physical Sciences and Engineering (PSE) Division
Citation:
Zhong Y, Wang X, Feng X, Telalovic S, Gnanou Y, et al. (2017) Osmotic heat engine using thermally responsive ionic liquids. Environmental Science & Technology. Available: http://dx.doi.org/10.1021/acs.est.7b02558.
Publisher:
American Chemical Society (ACS)
Journal:
Environmental Science & Technology
KAUST Grant Number:
URF/1/1723
Issue Date:
11-Jul-2017
DOI:
10.1021/acs.est.7b02558
Type:
Article
ISSN:
0013-936X; 1520-5851
Sponsors:
The work was supported by KAUST competitive research grant URF/1/1723.
Additional Links:
http://pubs.acs.org/doi/abs/10.1021/acs.est.7b02558
Appears in Collections:
Articles; Physical Sciences and Engineering (PSE) Division

Full metadata record

DC FieldValue Language
dc.contributor.authorZhong, Yujiangen
dc.contributor.authorWang, Xinboen
dc.contributor.authorFeng, Xiaoshuangen
dc.contributor.authorTelalovic, Selvedinen
dc.contributor.authorGnanou, Yvesen
dc.contributor.authorHuang, Kuo-Weien
dc.contributor.authorHu, Xiao Matthewen
dc.contributor.authorLai, Zhipingen
dc.date.accessioned2017-07-19T10:45:03Z-
dc.date.available2017-07-19T10:45:03Z-
dc.date.issued2017-07-11en
dc.identifier.citationZhong Y, Wang X, Feng X, Telalovic S, Gnanou Y, et al. (2017) Osmotic heat engine using thermally responsive ionic liquids. Environmental Science & Technology. Available: http://dx.doi.org/10.1021/acs.est.7b02558.en
dc.identifier.issn0013-936Xen
dc.identifier.issn1520-5851en
dc.identifier.doi10.1021/acs.est.7b02558en
dc.identifier.urihttp://hdl.handle.net/10754/625227-
dc.description.abstractThe osmotic heat engine (OHE) is a promising technology for converting low grade heat to electricity. Most of the existing studies have focused on thermolytic salt systems. Herein, for the first time, we proposed to use thermally responsive ionic liquids (TRIL) that have either an upper critical solution temperature (UCST) or lower critical solution temperature (LCST) type of phase behavior as novel thermolytic osmotic agents. Closed-loop TRIL-OHEs were designed based on these unique phase behaviors to convert low grade heat to work or electricity. Experimental studies using two UCST-type TRILs, protonated betaine bis(trifluoromethyl sulfonyl)imide ([Hbet][Tf2N]) and choline bis(trifluoromethylsulfonyl)imide ([Choline][Tf2N]) showed that (1) the specific energy of the TRIL-OHE system could reach as high as 4.0 times that of the seawater and river water system, (2) the power density measured from a commercial FO membrane reached up to 2.3 W/m2, and (3) the overall energy efficiency reached up to 2.6% or 18% of the Carnot efficiency at no heat recovery and up to 10.5% or 71% of the Carnet efficiency at 70% heat recovery. All of these results clearly demonstrated the great potential of using TRILs as novel osmotic agents to design high efficient OHEs for recovery of low grade thermal energy to work or electricity.en
dc.description.sponsorshipThe work was supported by KAUST competitive research grant URF/1/1723.en
dc.publisherAmerican Chemical Society (ACS)en
dc.relation.urlhttp://pubs.acs.org/doi/abs/10.1021/acs.est.7b02558en
dc.rightsThis document is the Accepted Manuscript version of a Published Work that appeared in final form in Environmental Science & Technology, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see http://pubs.acs.org/doi/abs/10.1021/acs.est.7b02558.en
dc.subjectOsmotic heat engineen
dc.subjectthermally responsive ionic liquiden
dc.subjectlow grade heaten
dc.subjectpressure-retarded osmosisen
dc.subjectosmotic pressureen
dc.titleOsmotic heat engine using thermally responsive ionic liquidsen
dc.typeArticleen
dc.contributor.departmentPhysical Sciences and Engineering (PSE) Divisionen
dc.identifier.journalEnvironmental Science & Technologyen
dc.eprint.versionPost-printen
dc.contributor.institutionEnvironmental Chemistry and Materials Centre, Nanyang Environment and Water Research Institute.en
dc.contributor.institutionSchool of Material Science and Engineering, Nanyang Technological University, Singapore.en
kaust.authorZhong, Yujiangen
kaust.authorWang, Xinboen
kaust.authorFeng, Xiaoshuangen
kaust.authorTelalovic, Selvedinen
kaust.authorGnanou, Yvesen
kaust.authorHuang, Kuo-Weien
kaust.authorLai, Zhipingen
kaust.grant.numberURF/1/1723en
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