Thermal conductivity of the ionic liquid [ HMIm ][ Tf2N ] with compressed carbon dioxide
Thermal conductivity of the ionic liquid [ HMIm ][ Tf2N ] with compressed carbon dioxide
复制标题
离子液体[ HMIm ][ Tf2N ]与压缩二氧化碳的热导率
DOI：
10.1002/aic.17635
复制
发表时间：
2022
期刊：
影响因子：
3.7
通讯作者：
Scurto, Aaron M.
中科院分区：
文献类型：
--
作者：
Al‐Barghouti, Karim S.;Scurto, Aaron M.
使用瞬态热线技术在三个等温线（298.15、323.15和348.15 K）和高达约20 MPa的压力下测量了用压缩蒸气和超临界二氧化碳饱和的离子液体（IL）1-己基-3-甲基-咪唑鎓双（三氟甲基磺酰基）酰胺（[HMIm][Tf 2N]）的液体热导率。纯[HMIm][Tf 2N]热导率还在环境压力下在293.15-353.15 K的温度范围内测量，并且流体静压力为约20 MPa。文献汽液平衡数据被用来预测在调查的条件下的液体CO2的组成。最初，液体的热导率略有下降的压力/CO2的组合物，然后逐渐增加，这主要是由于静水压力的影响。简单的基于成分的混合规则在定性和定量上都不准确。这些数据可用于设计各种建议的IL应用所需的传热设备，如CO2捕获，吸收式制冷，两相CO2/IL反应平台等。
The liquid thermal conductivity of the ionic liquid (IL), 1‐hexyl‐3‐methyl‐imidazolium bis(trifluoromethylsulfonyl)amide ([HMIm][Tf2N]), saturated with compressed vapor and supercritical carbon dioxide was measured over three isotherms (298.15, 323.15, and 348.15 K) and pressures up to approximately 20 MPa using a transient hot‐wire technique. Pure [HMIm][Tf2N] thermal conductivity was also measured over a temperature range of 293.15–353.15 K at ambient pressure and with hydrostatic pressure to approximately 20 MPa. Literature vapor–liquid equilibrium data were used to predict the liquid CO2composition at the conditions investigated. Initially, the liquid thermal conductivity slightly decreased with pressure/composition of CO2followed by a gradual increase that is mainly attributed to hydrostatic pressure effects. Simple composition‐based mixing rules for mixture properties are not qualitatively nor quantitatively accurate. These data could be used to engineer heat transfer equipment required for a variety of proposed IL applications in CO2capture, absorption refrigeration, biphasic CO2/IL reaction platforms, etc.