Abstract
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 (H/D) 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 °C. The results suggest that the PEI-loaded GF can be used as an economical adsorbent system for CO2 capture.
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