N-氨乙基哌嗪与甘氨酸钠CO2吸收剂配方研究
摘要：化学吸收法是捕集燃煤电厂烟气中CO2应用最为广泛的技术之一，但其存在吸收容量较低及再生能耗较高等问题，因此开发新型高效CO2吸收剂代替传统单乙醇胺(MEA)吸收剂是当前研究的重点之一。以质量分数为30%的MEA作为参考标准，研究不同配比的N-氨乙基哌嗪(AEP)+甘氨酸钠(SG)复配溶液对CO2的吸收和解吸性能，通过添加不同助剂调节溶液pH值提高吸收剂再生性能，通过对比吸收剂的吸收量、吸收速率、解吸量、解吸速率、吸收-解吸循环性能以及再生能耗，优选出35%AEP+5%SG+1%柠檬酸为最优复配吸收剂。结果表明，配比为35%AEP+5%SG+1%柠檬酸吸收剂CO2吸收量3.70 mol/L，解吸量为3.55 mol/L，解吸率达96.05%，单位再生能耗为136.75 kJ/mol，与质量分数30%MEA相比，吸收量提高1.18倍，解吸量增加2.17倍，解吸率提高30.93%，再生能耗下降33.90%。经过10次循环试验后，该复配溶液循环稳定性良好，再生性能较优，具有潜在的应用价值。
Abstract:Chemical absorption method is one of the most widely used technologies to capture CO2 from flue gas of coal-fired power plants, but it has problems of low absorption capacity and high regeneration energy consumption. Therefore, it is one of the current research focuses to develop a new efficient CO2 absorbent to replace the traditional monoethanolamine (MEA) absorbent..To study the CO2 absorption and desorption performance of aminoethylpiperazine (AEP)+sodium glycinate (SG) complex solution with different proportions, 30%MEA was used as a reference standard. By adding different additives to adjust the pH value of the solution, the regeneration performance of the absorbent was improved. According to the absorption capacity, absorption rate, desorption capacity, desorption rate, absorption-desorption cycle performance and regeneration energy consumption of the absorbent, 35%AEP+5%SG+1% citric acid was selected as the best compound absorbent. The results show that the ratio of 35%AEP+5%SG+1% citric acid absorbent CO2 absorption is 3.70 mol/L, desorption capacity is 3.55 mol/L, desorption rate is 96.05%, unit regeneration energy consumption is 136.75 kJ/mol. Compared with 30%MEA, the absorption capacity is increased by 1.18 times, desorption capacity is increased by 2.17 times, desorption rate is increased by 30.93%, and regeneration energy consumption is decreased by 33.90%. After 10 cycle tests, the compound solution has good cycle stability and good regeneration performance, and has potential application value.
标题：N-氨乙基哌嗪与甘氨酸钠CO2吸收剂配方研究
title:Formulation Study of N-Aminoethyl Piperazine and Sodium Glycine CO2 Absorbent
作者：汪丽, 张欢, 叶舣, 赵兴雷
authors:Li WANG, Huan ZHANG, Yi YE, Xinglei ZHAO
关键词：二氧化碳捕集,燃煤电厂,CO2吸收剂,N-氨乙基哌嗪(AEP),甘氨酸钠,柠檬酸,
keywords:carbon dioxide,coal-fired power plant,CO2 absorbent,N-aminoethyl piperazine,sodium glycine,citric acid,
发表日期：2023-10-31
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