Study on Benzylamine(BZA) and Aminoethylpiperazine(AEP) Mixed Absorbent on Ship-Based Carbon Capture

Abstract

To find suitable absorbents for ship-based carbon capture, the absorption and desorption properties of four mixed aqueous amines based on BZA were investigated, and the results indicated that BZA-AEP had the best absorption and desorption performance. Then, the absorption and desorption properties of different mole ratios of BZA-AEP were tested. The results showed that the average CO2 absorption rate had the highest value at the mole ratio of BZA to AEP of three. The average CO2 desorption rate had the maximum value at the mole ratio of BZA to AEP of one. Three fitted models of the absorption and desorption performance of BZA-AEP based on the test data were obtained. The p-values of all three models were less than 0.0001. Considering the performance and material cost, the BZA-AEP mole ratio of 1.5 is more appropriate for ship carbon capture. Compared with MEA, the average CO2 absorption rate increased by 48%, the CO2 desorption capacity increased by 120%, and the average CO2 desorption rate increased by 161%.

Catalytic-CO2-Desorption Studies of BZA-AEP Mixed Absorbent by the Lewis Acid Catalyst CeO2-γ-Al2O3

“…Consequently, the utilization of a metal oxide-supported γ-Al2O3 catalyst holds great potential for facilitating carbon dioxide desorption and reducing regeneration energy consumption. Mao et al [18] investigated the absorption and desorption characteristics of the BZA-AEP mixed amine absorbent, which demonstrated remarkable performance. In comparison to mono-ethanolamine (MEA), the BZA-AEP absorbent exhibited a 48% increase in average CO2 absorption rate, a 120% enhancement in CO2 desorption capacity, and a 161% rise in average CO2 desorption rate.…”

“…Mao et al [18] investigated the absorption and desorption characteristics of the BZA-AEP mixed amine absorbent, which demonstrated remarkable performance. In comparison to mono-ethanolamine (MEA), the BZA-AEP absorbent exhibited a 48% increase in average CO 2 absorption rate, a 120% enhancement in CO 2 desorption capacity, and a 161% rise in average CO 2 desorption rate.…”