以海水为介质吸收低浓度CO2的热力学研究
首发时间:2015-05-22
摘要:在自制的带夹套的双驱动搅拌装置中,采用流动法在温度为20~40℃,进气CO2浓度分别为2%、5%、10%、15%、20%的条件下测定了CO2在模拟海水中的气液平衡数据。采用含电解质的eNRTL模型描述液相的非理想性,用SRK方程描述气相的非理想性,对实验测得的气液平衡数据进行了关联计算,结果表明:模型的计算值与实验测定值吻合程度较好,其中pH测量值与计算值的相对偏差平均为2.36%。
关键词: 化工热力学 CO2吸收 海水 微藻 气液平衡 eNRTL模型
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Studies on the CO2 absorption thermodynamics under the low concentration by seawater
Abstract:The Gas-Liquid equilibrium data of CO2 dissolved in synthetic seawater were determined in a dual driving stirrer apparatus which has a jacket. The experimental temperature ranged from 20℃ to 40℃, and CO2 concentration of the inlet gas was 2%, 5%, 10%, 15% and 20% respectively. The eNRTL model was used to describe the non-ideality of liquid phase and SRK equation to describe the non-ideality of gas phase. The Gas-Liquid equilibrium experimental data were correlated. The results show that the model calculated values agree well with the measured values .The average of relative deviation between calculated and experimental values of pH was 2.36%.
Keywords: Chemical engineering thermodynamics CO2 absorption Seawater Microalgae Gas-liquid Equilibrium eNRTL model
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