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Design of quaternary ammonium type-ionic liquids as desiccants for an air-conditioning system

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摘要 The liquid desiccant air-conditioning system allows reducing energy consumption compared to the conventional compressor-type air conditioners.In order to develop desiccant materials for air conditioners,we have investigated the dehumidification capability of quaternary ammonium Ionic Liquids(ILs)and the equilibrium water vapor pressure of aqueous solutions of these ammonium salts.Among the seven tested types of ILs,2-hydroxyN,N,N-trimethylethan-1-aminium dimethylphosphate([Ch][DMPO4])displayed the best dehumidification capability and the lowest equilibrium water vapor pressure.Furthermore,the 80%aqueous solution of[Ch][DMPO4]exhibited a less corrosive effect on four types of metals,i.e.,steel(hot dip zinc-aluminum alloy plated steel),copper(C1100P),aluminum(A5052),and stainless steel(SUS:SUS304).It should be noted that this[Ch][DMPO4]is not only non-toxic but also exhibits a stable nature;the aqueous solution produced no odor after storing for over 1 year under ambient conditions.
出处 《Green Chemical Engineering》 2020年第2期109-116,共8页 绿色化学工程(英文)
基金 supported by National Natural Science Foundation of China(21676160,21825501,21905157,and U1801257) National Key Research and Development Program(2016YFA0202500 and 2016YFA0200102) China Postdoctoral Science Foundation(2018M641375 and 2019M650697) the Tsinghua University Initiative Scientific Research Program.
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