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Objective The CO2 absorption process under high gravity environment is simulated so as to provide guidance for the optimization of experimental process parameters. Methods An Aspen Plus calculation model for CO2 absorption using NaOH alkaline solution under high gravity was established, and the influence factors on the CO2 removal rate were investigated. Results While the high gravity reactor was equivalent to a conventional packed tower through the equivalent conversion method, the influence of sodium hydroxide mass fraction, solution feed rate and pressure on the CO2 removal rate were similar to that of the high gravity laboratory value, but the simulated value was only about 1/2 of the experimental value. The corrected simulation results were close to the experimental values, and the average deviation was only 0. 77%. Conclusions The established CO2 absorption model under high gravity environment is accurate and reliable, which can provide some directional guidance for subsequent experiments. [ABSTRACT FROM AUTHOR]

As a chemical method to remove carbon dioxide, the hot potassium carbonate process has been widely used in industrial fields such as flue gas carbon dioxide capture, synthetic ammonia gas purification, process circulation gas carbon dioxide separation due to its advantages of stable solution property, safety and low hydrocarbon loss. Due to the limitation of reaction rate of potassium carbonate solution, the activators should be added. The action mechanism, the types, the characteristics and limitations of carbon dioxide removal activators in hot potash solution are reviewed. The development direction of activators for CO2 removal in the future is pointed out. [ABSTRACT FROM AUTHOR]