MDEA-PZ-H_2O溶液中CO_2转化度的简化计算

Simplified Calculation of Degree of CO_2 Conversion in MDEA PZ H_2O Solution

根据ＣＯ２ － ＭＤＥＡ－ ＰＺ－ Ｈ２Ｏ 体系的热力学模型计算结果，对体系平衡关系简化后导出一个ＣＯ２ 分压与其转化度的简单关系，并关联出计算所需的２ 个表观平衡常数表达式。该关系式可简便用于ＭＤＥＡ 脱碳工艺的工程计算，ＣＯ２ 分压的计算值与实验值符合良好，平均偏差１１ ．３ ％ 。

After simplification of the equilibrium relationship of the CO 2 MDEA PZ H 2O system based on the calculation results from the thermodynamic model of the system, a simple relation is derived of the CO 2 partial pressure and its degree of conversion, and two expressions of apparent equilibrium constant required for calculation are correlated. The relation can be used conveniently in the engineering calculation of the process of CO 2 removal by MDEA, and the calculation value of CO 2 partial pressure agrees well with the experimental value, with an average deviation of 11.3%.