PREPARATION OF TETRAETHYLENEPENTAMINE MODIFIED STRAW AND ITS ADSORPTION OF SULFUR DIOXIDE

摘要

In this study, a straw-based, environmental friendly and low-cost adsorbent was used to remove sulfur dioxide (SO2) from flue gas. We investigated the effects of preparation conditions, such as catalyst dosage, the amine agent, and amine agent concentration on SO2 adsorption performance. Regeneration performances were also explored. Experimental results indicated that modified Straw-NH had a high SO(2)adsorption capacity (similar to 130 mg/g) which was very close to activated carbon and can be regenerated at 120 degrees C in a nitrogen atmosphere. Additionally, after five adsorption/regeneration cycles, the SO2 adsorption capacity remained at a relatively high level. Adsorbent properties were characterized using Brunauer-Emmett-Teller (BET), elemental analysis, Fourier transform infrared spectroscopy (FT-IR), and X-ray diffraction (XRD). This study indicated that modified Straw-NH may be an attractive practical alternative for SO2 removal.