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A series of the coconut activated carbons(CAC) based absorbents modified with Cu and Ce(Cu/CAC,Cu/Ce/CAC) were prepared by impregnation technology for carbon dioxide capture.The adsocrption equilibriums of CO2 on Cu/CAC and Cu/Ce/CAC were measured.The results showed that the adsorption capacity of CO2 onto the activated carbon modified with Cu/Ce increased with the decreasing temperature in the same pressure.The adsorption capacity of CO2 on Cu/CAC was higher than that of the blank CAC,and compared with the Cu/CAC,the adsorption capacity of CO2 of Cu/Ce/CAC with the mass ratio of Cu/Ce=30 was improved at 298 and 303 K.In addition,the adsorption equilibrium data for CO2 at various temperatures was fitted to Langmuir,Freundlich and D-R isotherm models.It was found that the D-R equation was the best model for fitting the adsorption data on Cu/Ce/CAC at different temperatures.
A series of the coconut activated carbons (CAC) based absorbents modified with Cu and Ce (Cu / CAC, Cu / Ce / CAC) were prepared by impregnation technology for carbon dioxide capture.The adscrption equilibriums of CO2 on Cu / CAC and Cu / The results showed that the adsorption capacity modified with Cu / Ce increased with the decreasing temperature in the same pressure. The adsorption capacity of CO2 on Cu / CAC was higher than that of the blank CAC, and compared with the Cu / CAC, the adsorption capacity of CO2 of Cu / Ce / CAC with the mass ratio of Cu / Ce = 30 was improved at 298 and 303 K. Addition, the adsorption equilibrium data for CO2 at various was was fitted to Langmuir, Freundlich and DR isotherm models. It was found that the DR equation was the best model for fitting the adsorption data on Cu / Ce / CAC at different temperatures.