离子液体[BMIM][BF_4]水溶液比热容及热工特性分析  

SPECIFIC HEAT CAPACITY AND THERMAL CHARACTERISTICS ANALYSIS OF IONIC LIQUID [BMIM][BF_4] AQUEOUS SOLUTION

作　　者：孙立[1] 郭开华[1] 皇甫立霞[1] 

机构地区：[1]中山大学工学院,广东广州510006

出　　处：《低温物理学报》2011年第5期381-385,共5页Low Temperature Physical Letters

基　　金：国家自然科学基金(51076169);广东省自然科学基金重点资助项目(9251027501000001)资助的课题~~

摘　　要：离子液体在化工和能源领域应用研究中,其比热及热工特性尤为重要,然而目前相关的比热数据较缺乏.研究主要对离子液体[BMIM][BF4]及其水溶液的比热容进行了测定.测试系统采用耐驰DSC204HP低温高压差热仪,测试精度较高且稳定可靠.实验测试的温度范围为273.15K^423.15K,测试的离子液体摩尔浓度分别为1.0,0.0738,0.1374,0.2098,0.4433,0.6143.同时对[BMIM][BF4]+H2O溶液的焓进行了计算,并对其单效吸收式制冷循环性能进行了分析.研究结果为离子液体的工业应用提供了可靠的比热容数据,也指出了[BMIM][BF4]+H2O工质对作为吸收式制冷工质对的可行性和问题.In recent years,the industrial application of ionic liquids became more and more attention,but the specific heat data is lack.In this paper,heat capacity properties of the ionic liquid [BMIM][BF4] and aqueous solution were measured with NETZSCH DSC204HP test system,the temperature range of experimental tests 273.15K ~ 423.15K,the molar concentration of aqueous solution were 1.0,0.0738,0.1374,0.2098,0.4433,0.6143.Meanwhile,[BMIM][BF4]＋H2O was analyzed as working pair of single-effect absorption refrigeration cycle.This article provides a reliable heat capacity data for the industrial application of ionic liquids,and also pointed out that [BMIM][BF4]＋H2O as working fluid for absorption refrigeration working pair inadequate.

关 键 词：离子液体 [BMIM][BF4]+H2O 比热容 热工特性 

分 类 号：TQ413.2[化学工程]