Abstract: Organized mesoporous alumina (OMA) was synthesized by Al(NO3)3· 9H2O, non-surfactant CA was used as template , dilute ammonia as precipitating agent .Solid amine adsorbents were prepared by introducing tetraethylenepentamine ( TEPA ) into OMA by physical impregnation method for CO 2 capture.The synthesized adsorbents were charactered by XRD , N2 adsorption-desorption and TEM .The adsorption separation properties of CH 4/CO2 were discussed by means of breakthrough curve analysis in self-made fixed bed and the effects of TEPA loadings and adsorption temperatures were investigated .The results show that the maximal adsorption capacities are 2 .598 mmol/g achieved as 50% TEPA loadings and 70 ℃ adsorption temperature.In addition, after ten cyclic adsorption-desorption tests, the CO2 adsorption capacity changes a little , just decreases about 8.65%, demonstrating the TEPA/OMA adsorbent displays am excellent regenerability .

Key words: organized mesoporous alumina;TEPA;CO2;adsorption property;separation factor