[摘要]：A solid amine adsorbent for CO2 was developed by carbon nanotubes (CNTs) impregnated with tetraethylenepentamine (TEPA). The adsorption behavior toward CO2 (2.0 vol %) was investigated in a fixed-bed column. After modification, the adsorption capacity of CNTs-TEPA reached 2.97 mmol g(-1) at 298 K Rising temperatures from 283 to 313 K enhanced the CO2 adsorption capacity. The maximum adsorption capacity was approximately 3.56 mmol g(-1) at 313 K. The adsorption capacity was also influenced by moisture and reached as high as 3.87 mmol g(-1) (2.0% H2O). In comparison to many other types of modified carbon or silica adsorbents in the literature, CNTs-TEPA had a higher adsorption capacity at the same temperature. The adsorption capacity for CO2 remained almost the same after cyclic regeneration experiments. A deactivation model, capable of describing the uptake of CO2, was applied under various conditions. In all cases, the experimental data agreed with the predicted breakthrough model.
