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dc.contributor.authorZhong, Yujiang
dc.contributor.authorWang, Xinbo
dc.contributor.authorFeng, Xiaoshuang
dc.contributor.authorTelalovic, Selvedin
dc.contributor.authorGnanou, Yves
dc.contributor.authorHuang, Kuo-Wei
dc.contributor.authorHu, Xiao Matthew
dc.contributor.authorLai, Zhiping
dc.date.accessioned2017-07-19T10:45:03Z
dc.date.available2017-07-19T10:45:03Z
dc.date.issued2017-07-24
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.
dc.identifier.issn0013-936X
dc.identifier.issn1520-5851
dc.identifier.pmid28693317
dc.identifier.doi10.1021/acs.est.7b02558
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.
dc.description.sponsorshipThe work was supported by KAUST competitive research grant URF/1/1723.
dc.publisherAmerican Chemical Society (ACS)
dc.relation.urlhttp://pubs.acs.org/doi/abs/10.1021/acs.est.7b02558
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.
dc.subjectOsmotic heat engine
dc.subjectthermally responsive ionic liquid
dc.subjectlow grade heat
dc.subjectpressure-retarded osmosis
dc.subjectosmotic pressure
dc.titleOsmotic heat engine using thermally responsive ionic liquids
dc.typeArticle
dc.contributor.departmentAdvanced Membranes and Porous Materials Research Center
dc.contributor.departmentChemical Engineering Program
dc.contributor.departmentChemical Science Program
dc.contributor.departmentHomogeneous Catalysis Laboratory (HCL)
dc.contributor.departmentKAUST Catalysis Center (KCC)
dc.contributor.departmentPhysical Science and Engineering (PSE) Division
dc.identifier.journalEnvironmental Science & Technology
dc.eprint.versionPost-print
dc.contributor.institutionEnvironmental Chemistry and Materials Centre, Nanyang Environment and Water Research Institute.
dc.contributor.institutionSchool of Material Science and Engineering, Nanyang Technological University, Singapore.
kaust.personZhong, Yujiang
kaust.personWang, Xinbo
kaust.personFeng, Xiaoshuang
kaust.personTelalovic, Selvedin
kaust.personGnanou, Yves
kaust.personHuang, Kuo-Wei
kaust.personLai, Zhiping
kaust.grant.numberURF/1/1723
refterms.dateFOA2018-07-11T00:00:00Z
dc.date.published-online2017-07-24
dc.date.published-print2017-08-15


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