CAJ | 학술논문

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 CO2-SO2在H2O-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SO2比 CO2优先溶解，溶液只有在基本上完全吸收SO2之后才会吸收CO2；而且其溶解度比较大，常温常压下1 mol的MDEA可吸收超过1.4 mol的SO2气体。在气体分压为(1~100) kPa范围内，SO2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，SO2的溶解度有较大程度的下降；若同时添加MEA-DEA2种活化剂，SO2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。
통과리자반응식화형리정률건립수학모형，재대모형진행괄당간화적기출상재차조편정수단가이득도 CO2-SO2재H2O-MDEA-활화알복잡다원용액체계중용해도적수치해。연구표명，재 MDEA 질량분솔30%적수용액중SO2비 CO2우선용해，용액지유재기본상완전흡수SO2지후재회흡수CO2；이차기용해도비교대，상온상압하1 mol적MDEA가흡수초과1.4 mol적SO2기체。재기체분압위(1~100) kPa범위내，SO2적용해도수압력삼수적영향교대；이재차압력범위지외，온도삼수칙성위주요영향인소。재MDEA수용액중첨가MEA혹DEA활화제，수착활화제질량분솔적증가，SO2적용해도유교대정도적하강；약동시첨가MEA-DEA2충활화제，SO2적용해도회수착MEA질량분솔적증가이감소，단감소적폭도병불대。
A relatively accurate numerical solution to the solubility of CO2-SO2 in H2O-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 to100 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.