高温高压下CO_2在重质烷烃中的溶解度和体积传质系数的研究

SOLUBILITY AND MASS TRANSFER COEFFICIENTS OF CARBON DIOXIDE IN HEAVY NORMAL PARAFFINS

使用１Ｌ的高压搅拌釜，应用气体间歇吸收技术，在温度３７３～５７３Ｋ，压力１．０～４．０ＭＰａ，搅拌速度８００ｒ／ｍｉｎ的实验范围内，测定了ＣＯ２在液体石蜡、ＦＴ３００蜡中的溶解度和体积传质系数。实验结果表明ＣＯ２在上述蜡中的溶解度和体积传质系数是温度和压力的函数。利用ＫｒｉｃｈｅｖｓｋｙＫａｓａｒｎｏｖｓｋｙ方程求出了ＣＯ２在两种液体介质中的亨利系数，并用实验数据获得了ＣＯ２在两种液体介质中溶解热值。

Equilibrium gas solubility (C ) and volumetric liquidside mass transfer coefficients (k La) of CO 2 in nparaffin, FT300wax were measured as functions of temperature (372～573K), pressure (1～4MPa) and stirrer speed (800r/min) in a 1 liter mechanically sgitated and surfaceaerated autoclave Experiments were carried out by using a transient absorption technique In the range of operating conditions investigated, the C  values for carbon dioxide in two organic liquids increased with pressure, but decreased with temperature The data showed that C (in nparaffin)>C (in FT300wax) At carbon dioxide mole fractions below 0 45, the solubility data can be described by the KrichevskyKasamovsky equation The results also indicated that the k La values for carbon dioxide in two liquids used increased with temperature and pressure, but decreased with increasing carbon number of the liquid