作　　者： ; ; ; ; (荆强征）; (沈吉兆）;

机构地区： 西安交通大学能源与动力工程学院动力工程多相流国家重点实验室

出　　处： 《计算机与应用化学》 2013年第5期492-496,共5页

摘　　要： 通过离子反应式和亨利定律建立数学模型,在对模型进行适当简化的基础上再借助编程手段可以得到CO_2-SO_2在H_2O-MDEA-活化胺复杂多元溶液体系中溶解度的数值解。研究表明,在MDEA质量分率30%的水溶液中SO_2比CO_2优先溶解,溶液只有在基本上完全吸收SO_2之后才会吸收CO_2;而且其溶解度比较大,常温常压下1 mol的MDEA可吸收超过1.4mol的SO_2气体。在气体分压为(1～100)kPa范围内,SO_2的溶解度受压力参数的影响较大:而在此压力范围之外,温度参数则成为主要影响因素。在MDEA水溶液中添加MEA或DEA活化剂,随着活化剂质量分率的增加,SO_2的溶解度有较大程度的下降;若同时添加MEA-DEA2种活化剂,SO_2的溶解度会随着MEA质量分率的增加而减小,但减少的幅度并不大。 A relatively accurate numerical solution to the solubility of CO2-SO2 in H20-MDEA-DEA-MEA could be obtained with the help of specific programming method and a simplified mathematical model based on the ion reactions and Henry＇s law. This research showed that in the aqueous solutions where MEDA mass fraction was 30 %, SO2 dissolved prior to CO2, and the solution absorbed SO2 only if CO2 were almost absorbed already. Moreover, the solubility of SO2 was fairly high, and 1 mol of MDEA could absorb more than 1.4 mol of SO2 at room temperature and pressure. The Pressure parameter had a significant influence on the solubility of SO2 if the partial pressure was from 1 kPa tol00 kPa. Nevertheless, temperature became the main influence factor when the pressure was beyond that range. When MEA or DEA was added to the MDEA solution, the solubility of SO2 would decrease substantially with the increase in the activator quality fraction. While, when MEA and DEA were added to the solution together, the solubility of SO2 would decrease with the increase in the MEA quality fraction, but the reduction was relatively small.

关 键 词： 气体 数学模型 溶解度 活化剂

领　　域： [化学工程] [理学]