Adsorptive removal of carbon dioxide using polyethyleneimine loaded glass fiber in a fixed bed

Low-cost glass fiber (GF) was modified by loading polyethyleneimine (PEI) using a physical impregnation method and applied as an adsorbent for CO2 capture. The structure and morphology of the PEI-loaded GF were characterized by thermogravimetic analyzer (TGA), fourier transform infrared spectroscopy (FTIR) and scanning electron microscope (SEM). The PEI-loaded GF possessed a core-shell structure. The CO2 dynamic adsorption-desorption performances were investigated in a PEI-loaded GF fixed bed. The effects of PEI loading ratio, adsorption temperature, relative humidity (RH), flow rate and bed depth (HID) ratio were examined, and the maximal dynamic CO2 adsorption capacity was 60.04 mg g(-1) with a PEI/GF ratio of 0.70 g g(-1). In addition, the PEI-loaded GF was regenerated with only a slight decrease in the adsorption capacity after multiple regenerations using an optimum regeneration temperature of 100 degrees C. The results suggest that the PEI-loaded GF can be used as an economical adsorbent system for CO2 capture. (C) 2015 Elsevier B.V. All rights reserved.