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在温度353.2～453.2K、压力0.75～5.25MPa的条件下,采用平衡取样的方法,测定了氢气在不同组成(xi为摩尔分数)的四种液体乙酰丙酸、乙酰丙酸(x1=0.37)+水(x2=0.63)、γ-戊内酯、乙酰丙酸(x1=0.33)+水(x2=0.33)+γ-戊内酯(x3=0.34)中的溶解度.根据亨利定律对实验数据进行关联,得出不同温度下氢气在液体中的亨利系数,通过亨利系数和温度的关系,计算出氢气在液体中的摩尔溶解焓和摩尔溶解熵.结果表明:在实验温度、压力范围内,提高温度、增加压力,氢气在四种不同液体中的溶解度皆增大;在温度和压力相同时,氢气在四种液体乙酰丙酸(x1=0.37)+水(x2=0.63)、乙酰丙酸、乙酰丙酸(x1=0.33)+水(x2=0.33)+γ-戊内酯(x3=0.34)和γ-戊内酯中的溶解度依次增大;氢气在四种液体中的亨利系数均随着温度的升高而减小;氢气在四种液体中的摩尔溶解焓为正值,摩尔溶解熵为负值.
Under the conditions of temperature 353.2 ~ 453.2K and pressure of 0.75 ~ 5.25MPa, four liquid levulinic acid, levulinic acid (x1 = 0.37) with different composition of hydrogen (mole fraction xi) + Water (x2 = 0.63), γ-valerolactone, levulinic acid (x1 = 0.33) + water (x2 = 0.33) + γ- valerolactone (x3 = 0.34). According to Henry’s Law, experimental data The Henry’s coefficient of hydrogen in liquid at different temperatures was obtained.The molar enthalpy and molar entropy of hydrogen in liquid were calculated by the relationship between Henry’s coefficient and temperature.The results showed that under the experimental temperature and pressure range, When the temperature and pressure were the same, the hydrogen content in four liquid levulinic acid (x1 = 0.37) + water (x2 = 0.63), levulinic acid , And the solubility of levulinic acid (x1 = 0.33) + water (x2 = 0.33) + γ-valerolactone (x3 = 0.34) and γ-valerolactone increased in sequence. The Henry’s coefficient of hydrogen in all four liquids Decreases with the increase of temperature. The molar enthalpy of solution of hydrogen in four liquids is positive and the entropy of molar dissolution is negative.