Abstract:A novel solid amine adsorbent was prepared by a suspension polymerization of methyl methacrylate (MMA) and trimethylolpropane triacrylate (TMPTA), followed by aminating with tetraethylenepentamine-acrylonitrile (TEPA-AN). The structure, morphology and stability of solid amine adsorption materials were characterized by using SEM, FTIR, nitrogen adsorption-desorption isotherm, thermogravimetric analysis (TG), elemental analysis (EA) and other methods. Factors that could determine the CO2 adsorption performance of the solid amine adsorbent, such as adsorption temperature, organic amine loading and humidity, were investigated. The results show that the maximum adsorption capacity of CO2 (93.43mg/g) was achieved at 25 °C with CO2 concentration of 1(±0.1) vol%, the flow rate of 0.4 L/min and 60% TEPA-AN load. The presence of water can increase the adsorption capacity of this solid amine adsorbent for CO2. Under the condition of humidity of 50(±5)%, the adsorption capacity of CO2 can be increased to 105.30mg/g. After 9 cycles of regeneration adsorption, the adsorbent still retained 96.554% of its initial adsorption capacity. The results show that the TEPA-AN modified porous P(MMA-TMPTA) solid amine adsorbent has stable regeneration performance, excellent adsorption capacity and selective adsorption for CO2.The kinetics study found that both physical adsorption and chemical adsorption were involved in CO2 adsorption.