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Osmotic Heat Engine Using Thermally Responsive Ionic Liquids
Environmental Science & Technology ( IF 10.8 ) Pub Date : 2017-07-24 00:00:00 , DOI: 10.1021/acs.est.7b02558 Yujiang Zhong 1 , Xinbo Wang 1 , Xiaoshuang Feng 1 , Selvedin Telalovic 1 , Yves Gnanou 1 , Kuo-Wei Huang 1 , Xiao Hu 2, 3 , Zhiping Lai 1
Environmental Science & Technology ( IF 10.8 ) Pub Date : 2017-07-24 00:00:00 , DOI: 10.1021/acs.est.7b02558 Yujiang Zhong 1 , Xinbo Wang 1 , Xiaoshuang Feng 1 , Selvedin Telalovic 1 , Yves Gnanou 1 , Kuo-Wei Huang 1 , Xiao Hu 2, 3 , Zhiping Lai 1
Affiliation
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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.
中文翻译：
使用热响应性离子液体的渗透热机
渗透热机（OHE）是一种将低级热量转化为电能的有前途的技术。现有的大多数研究都集中在热解盐体系上。本文中，我们首次提出使用具有高临界溶液温度（UCST）或较低临界溶液温度（LCST）类型的相行为的热响应离子液体（TRIL）作为新型热解渗透剂。闭环TRIL-OHE是基于这些独特的相行为而设计的，可将低等级的热量转换为工作或电力。使用两个UCST型TRIL，质子化甜菜碱双（三氟甲基磺酰基）酰亚胺（[Hbet] [Tf 2 N]）和胆碱双（三氟甲基磺酰基）酰亚胺（[胆碱] [Tf 2N]）表明（1）TRIL-OHE系统的比能可以达到海水和河水系统的4.0倍，（2）从商用FO膜测得的功率密度高达2.3 W / m 2，以及（3）在无热回收的情况下，总能量效率高达卡诺效率的2.6％或18％，在热回收率70％的情况下高达Carnet效率的10.5％或71％。所有这些结果清楚地证明了将TRILs用作新型渗透剂来设计高效的OHE，以回收低级热能以作功或用电的巨大潜力。
更新日期：2017-07-25
中文翻译：
使用热响应性离子液体的渗透热机
渗透热机（OHE）是一种将低级热量转化为电能的有前途的技术。现有的大多数研究都集中在热解盐体系上。本文中，我们首次提出使用具有高临界溶液温度（UCST）或较低临界溶液温度（LCST）类型的相行为的热响应离子液体（TRIL）作为新型热解渗透剂。闭环TRIL-OHE是基于这些独特的相行为而设计的，可将低等级的热量转换为工作或电力。使用两个UCST型TRIL，质子化甜菜碱双（三氟甲基磺酰基）酰亚胺（[Hbet] [Tf 2 N]）和胆碱双（三氟甲基磺酰基）酰亚胺（[胆碱] [Tf 2N]）表明（1）TRIL-OHE系统的比能可以达到海水和河水系统的4.0倍，（2）从商用FO膜测得的功率密度高达2.3 W / m 2，以及（3）在无热回收的情况下，总能量效率高达卡诺效率的2.6％或18％，在热回收率70％的情况下高达Carnet效率的10.5％或71％。所有这些结果清楚地证明了将TRILs用作新型渗透剂来设计高效的OHE，以回收低级热能以作功或用电的巨大潜力。
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