College of Power and Energy Engineering, Harbin Engineering University, Harbin, 150001, China.
Low Carbon Energy Institute, China University of Mining and Technology, Xuzhou, 221008, China.
Environ Sci Pollut Res Int. 2023 Jul;30(33):80416-80431. doi: 10.1007/s11356-023-28054-2. Epub 2023 Jun 10.
Post-combustion carbon capture is a direct and effective way for onboard carbon capture. Therefore, it is important to develop onboard carbon capture absorbent that can both ensure a high absorption rate and reduce the energy consumption of the desorption process. In this paper, a KCO solution was first established using Aspen Plus to simulate CO capture from the exhaust gases of a marine dual-fuel engine in diesel mode. The lean and rich CO loading results from the simulation were used to guide the selection and optimization of the activators used in the experiment. During the experiment, five amino acid salt activators including SarK, GlyK, ProK, LysK, and AlaK and four organic amine activators including MEA, PZ, AEEA, and TEPA were used. Experiments only considered the activation effect of CO loading between lean and rich conditions. The results showed that after adding a small amount of activator, the absorption rate of CO by the absorbent was greatly improved, and the activation effect of organic amine activators was stronger than that of amino acid salts. Among the amino acid salts, the SarK-KCO composite solution showed the best performance in both absorption and desorption. Among the amino acid salts and the organic amino activators, SarK-KCO showed the best performance in strengthening the CO desorption while PZ-KCO enhanced the CO absorption process the most. In the study of the concentration ratio, it was found that when the mass concentration ratio was 1:1 for SarK:KCO and PZ:KCO, the CO absorption and desorption processes improved well.
燃烧后捕集是一种直接有效的机载捕集方法。因此，开发既能保证高吸收率又能降低解吸过程能耗的机载捕集吸收剂非常重要。本文首先使用 Aspen Plus 建立了 KCO 溶液，以模拟船用双燃料发动机在柴油模式下从废气中捕集 CO。模拟得到的贫载和富载 CO 的结果用于指导实验中所使用的活化剂的选择和优化。在实验中，使用了 SarK、GlyK、ProK、LysK 和 AlaK 五种氨基酸盐活化剂和 MEA、PZ、AEEA 和 TEPA 四种有机胺活化剂。实验仅考虑了贫载和富载条件下 CO 加载的活化效果。结果表明，加入少量活化剂后，吸收剂对 CO 的吸收速率大大提高，有机胺活化剂的活化效果强于氨基酸盐。在氨基酸盐中，SarK-KCO 复合溶液在吸收和解吸方面表现出最佳性能。在氨基酸盐和有机氨基活化剂中，SarK-KCO 在增强 CO 解吸方面表现最佳，而 PZ-KCO 则在增强 CO 吸收过程方面表现最佳。在浓度比的研究中，发现当 SarK:KCO 和 PZ:KCO 的质量浓度比为 1:1 时，CO 的吸收和解吸过程得到了很好的改善。
