Capture of carbon dioxide by amine-impregnated as-synthesized MCM-41

The novel carbon dioxide (CO₂) adsorbents with a high capture efficiency were prepared through impregnating the as-synthesized MCM-41 with three kinds of amines, namely diethylenetriamine (DETA), triethylenetetramine (TETA) and 2-amino-2-methyl-1-propanol (AMP). The resultant samples were characterized by small angle X-ray diffraction and low temperature N₂ adsorption. The synthesis way not only saves the energy or extractor to remove the template but also is environmentally friendly due to the absence of the potential pollutants such as toluene. CO₂ capture was investigated in a dynamic packed column. The sample impregnated by TETA showed the highest adsorption capacity, approximately 2.22 mmol/g at 60°C due to its highest amino-groups content among the three amines. The CO₂ adsorption behavior was also investigated with the deactivation model, which showed an excellent prediction for the breakthrough curves.