EXPERIMENTAL STUDY ON VAPOR PRESSURE AND CRITICAL PARAMETERS OF CH_3CF_3

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EXPERIMENTAL STUDY ON VAPOR PRESSURE AND CRITICAL PARAMETERS OF CH_3CF_3

Wang Huaixin, Li Zhong, Ma Yitai and Lu Canren (Thermal Energy Research Institute of Tianjain University , Tianjain 300072 )

Online:1993-06-25 Published:1993-06-25

CH_3CF_3的蒸汽压与临界参数实验研究

王怀信,李忠,马一太,吕灿仁

天津大学热能研究所,天津大学热能研究所,天津大学热能研究所,天津大学热能研究所天津300072 ,天津300072 ,天津300072 ,天津300072

Abstract

Abstract: Sixty one vapor pressure data of CH3CF3 above 230K have been measured with a precision of |ΔT≤ 28mK, |Δp|≤ 1.4kPa, which showed, obvious deviation from references. The critical parameters were determined as ρc = 442± 4kg/ m3, TC = 346.16 ± 0.05K and pc = 3.781± 0.006MPa by observing the disappearance of vapor-liquid meniscus and the critical opalescence. The normal boiling point was predicted as Tb = 225.69K.

摘要： 测量了CH_3CF_3 230K以上的蒸汽压与临界参数.蒸汽压测量精度为|△T|≤28mk和|△р|≤1.4Pa,结果对文献蒸汽压方程呈明显偏差.基于汽液界面消失位置和临界乳光现象,测定了临界密度ρ_c=442±4kg/m~3、临界温度T_c=346.16±0.05K,由本文蒸汽压方程算出临界压力ρ_c=3.781±0.006MPa.文中还给出了一个新的正常沸点推算值T_b=225.69K.

Wang Huaixin, Li Zhong, Ma Yitai and Lu Canren (Thermal Energy Research Institute of Tianjain University , Tianjain 300072 ). EXPERIMENTAL STUDY ON VAPOR PRESSURE AND CRITICAL PARAMETERS OF CH_3CF_3[J]. .

王怀信,李忠,马一太,吕灿仁. CH_3CF_3的蒸汽压与临界参数实验研究 [J]. CIESC Journal.