摘要
在温度298—338 K,压力300—700 kPa,吸收剂浓度1—3 mol/L的实验条件范围内,讨论了CO2-吸收剂体系气液二相基本达到平衡时,CO2吸收量与体系温度,压力及吸收剂浓度的关系。根据亨利定律,引入温度及压力相关因子,建立了CO2在单胺溶液中的溶解度模型。模型对CO2在MEA、DETA单胺溶液中的溶解度预测效果较好,与实验值比较,误差在1%以下。引入增强因子β=1.06,并以单胺在混合胺溶液中的摩尔分数为系数,将CO2在单胺溶液中的溶解度叠加获得CO2在MEA+DETA混合溶液中的溶解度模型。模型对MEA+DETA混合胺的预测误差在1%—10%。
The relations of CO2 absorption capacity with the system temperature, pressure and absorbent concentration were studied respectively when the CO2-absorbent system achieved the gas-liquid dynamic equilibrium,under the condition of 298-338 K, 300-700 kPa and 1-3 mol/L. Based on Henry＇s law, a model of CO2 solubility in single amine solution was established with citing a factor related with temperature and pressure. The model predicts the solubility of CO2 in MEA and DETA single amine solution well, with the error below 1%. The CO2 solubility in MEA and DETA single amine solution was multiplied by the mole fraction of MEA and DETA in the MEA ＋ DETA blended amine solutions respectively and stacked, with citing an enhancement factor （β = 1.06） , the model of CO2 solubility in MEA ＋ DETA blended amine solution was built. The model predicts the solubility of CO2 in MEA ＋ DETA blended amine solution well, with the error of 1%-10%.
出处
《化学工程》
CAS
CSCD
北大核心
2013年第7期34-37,49,共5页
Chemical Engineering(China)
基金
"十二五"国家科技重大专项资助项目(ZX201105041-004)
