充てん塔におけるモノエタノールアミン水溶液のCO_2吸収・放散特性

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A solar hydrogen-methanol energy system for transportation sector in Japan has been proposed by the authors, in which carbon dioxide is supposed to be recycled. In this scenario, a carbon dioxide recovery equipment is necessary for heat engines used in transportation. Although an equipment using aqueous solution of monoethanolamine (MEA) is promising, there is not enough data applicable to design of it for heat engines. Both carbon dioxide absorption and desorption characteristics of aqueous solution of MEA in a packed column are experimentally obtained with a wide range of parameters and are discussed with a theoretical prediction. The prediction model is based on the two-film theory. With respect to chemical processes, it is assumed that reaction for absorption is irreversible, non-instaneous and of second-order, and for desoption chemical equilibrium prevails everywhere in the liquid phase. In the reasonable region of process conditions, this model predicts the absorption efficiencies, the desorption efficiencies and the energies required for stripping with an error between ±30%, and the overall mass transfer coefficients for absorption with an error between ±50%, With respect to the overall mass transfer coefficients for desorption the predicted scatter from-50% to 500% of the experimental ones. Packed column heights can be determined by this model, while the accuracy is as good as the overall mass transfer coefficients.
独立行政法人海上技術安全研究所の論文
1997-01-13

充てん塔におけるモノエタノールアミン水溶液のCO_2吸収・放散特性

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