甲烷在烷烃中溶解性质的研究

Study of the Solubility of Methane in Alkanes

分析了高压下甲烷在从乙烷到正十六烷共计十六种溶剂中的溶解度数据,对在同一温度不同压力下的数据进行了分析并关联得出相应的亨利系数,通过分析得知甲烷在所分析数据的压力范围内也符合亨利定律。同时对甲烷在不同溶剂中的亨利系数和温度的变化趋势作图,并且详细分析了溶剂的碳原子数、支链甲基和直链碳原子数对甲烷亨利系数的影响, 拟合得到了亨利常数与温度关联式的系数,同时提出了以临界体积为参数的甲烷在饱和烃中亨利系数的估算方法。为液态天然气的使用提供了必要的基础数据和计算方法。

The solubility data of methane in sixthteen alkanes, ranging from methane to hexadecane, were studied at higher pressures. Henry抯 constants were gotten by correlating the data of different pressures in the same temperature. It was proved that Henry抯 law was applicable at the pressures studied. Meanwhile, the graphs for Henry抯 constants of methane in alkanes for different temperatures were gotten. The effects of solvent carbon atoms, and structure of alkanes on Henry抯 constant of methane were also studied. The temperature coefficients of Henry抯 constant equation were correlated. A method was proposed to estimate Henry抯 constants of methane in alkanes by using the critical volume of the alkane solvent at given temperature. The above data and calculation methods are helpful for the application of liquefied natural gas.