MDEA-PZ复配体系吸收电厂烟气中CO_(2)的特性研究

Study on Characteristics of MDEA-PZ Composite System Absorbing CO_(2) from Power Plant Smoke

采用自制的稳态平面反应器,以MDEA为基液,PZ为活化剂制备复配溶液,研究了活化剂浓度、反应温度、系统压力、碱催化剂含量对试剂捕集CO_(2)的影响。通过各反应条件下的吸收容量、吸收速率、碳容进行对比分析,结果表明:溶液的吸收性能随活化剂浓度、系统压力的升高而升高,随反应温度和碱催化剂含量的升高均呈现先上升后下降的趋势。最佳的反应条件为试剂配比1.7 mol/L MDEA+0.5 mol/L PZ,温度313 K,系统压力0.5 MPa,碱催化剂4 mmol Ca(OH)_(2)。

A self-made steady-state planar reactor was used to prepare a composite solution using MDEA as the base liquid and PZ as the activator. The effects of activator concentration, reaction temperature, system pressure, and alkali catalyst content on the capture of CO_(2) by the reagent were studied. By comparing and analyzing the absorption capacity, absorption rate, and carbon capacity under various reaction conditions, the results showed that the absorption performance of the solution increased with the increase of activator concentration and system pressure, and showed a trend of first increasing and then decreasing with the increase of reaction temperature and alkali catalyst content. The optimal reaction conditions are the reagent ratio of 1.7mol/L MDEA+0.5mol/L PZ, temperature of 313K, system pressure of 0.5MPa, and alkali catalyst of 4mmolCa(OH)_(2).