CO等气体在苯酚中的溶解度的测定及关联

Measurement and correlation of solubility of carbon monoxideand other gases solubility in phenol

建立了一套用于测定高中压下气体在黏度大、易结晶高黏度溶剂中溶解度的汽液平衡测定装置,该装置采用整体温浴、流动的方法很好地解决了溶剂苯酚易结晶而带来操作困难的问题,利用该套高中压汽液平衡测定装置,在不同温度和压力下,测定了CO_2、CO、N_2、O_2气体在纯苯酚中的溶解度数据.采用RK方程的维里展开式和正规溶液理论推算得到的气体溶解度与温度和压力的函数关系式,并对相同温度和压力下CO等气体在纯苯酚中的溶解度进行了三参数关联,得出了溶解度的计算模型.最后,用这一模型关联计算CO_2、N_2、O_2和CO在纯苯酚中的溶解度,结果表明,计算值和实验值误差较小,因此,该计算模型可以用于对相同温度下加压气体在纯苯酚中溶解度的关联和内插计算.

A new instrument of measuring gas solubility was developed, and the solubility values of carbon monoxide, oxygen and other gases in phenol were measured respectively within temperature range of 55 to 95 ℃ and pressure range of 1.00 to 8.00 MPa. The results showed that the solubility values of carbon dioxide decreased with rising temperature, but the case was reversed for carbon monoxide, oxygen and nitrogen. By using the regular-solution theory and the virial expansion for the Redlich-Kwong equation of state, an equation was proposed to relate the solubility values of the gases in the non-volatile solvent to temperature and pressure. The equations used to correlate the high-pressure gas solubility values of carbon monoxide, oxygen and nitrogen in phenol at various temperatures were accurate.