Kermanshah University of Technology, Department of Chemical Engineering, Imam Khomeini HWY., Kermanshah, Iran.
Kermanshah University of Technology
Recently, the acid gas reactive absorption process by solvent used in the acid refining processes, comprehensively. In this experimental study, the carbon dioxide absorption process performed by a hybrid solvent, glycerol - potassium hydroxide in a packed tower. The effect of various factors, such as potassium hydroxide concentration (0.2-0.8 M), glycerol concentration (4-12 wt. %), and gas flow (2.3 and 1.7 L/min) at 35 ° C, 10 vol.% CO2 concentrate and atmospheric pressure have been investigated. CO2 absorption percentage and overall gas phase mass transfer coefficient has been selected as response. The results show that increasing the concentration of glycerol and potassium hydroxide in the mentioned operating conditions can decrease the outlet CO2 concentration. Percentage of carbon dioxide absorption by this hybrid solvent at a flow rate of 1.7 L/min, 12 wt. % glycerol, and 0.8 M potassium hydroxide, was 94.28%. Also, the maximum overall mass transfer coefficient based on the gas phase in the mentioned conditions, was obtained 0.96 kmol/ m3.h.kpa at 0.8 M potassium hydroxide, 12 wt. % of glycerol, and the gas flow 2.3 L/min.