Effect of gypsum addition on syngas production during CO2-assisted gasification of pinewood

Le résumé fourni par la source

• Synergetic potential of incorporating waste gypsum into the gasification of pinewood • Addition of 16.67 wt.% gypsum improves the conversion of pinewood to syngas • Gypsum consumes char to CO and CO 2 • Gypsum excess of 50 wt.% reduces syngas yield and quality. This study investigates the potential synergistic effects of incorporating gypsum in CO 2 -assisted gasification of pinewood. The synergistic interaction between pinewood and gypsum enhanced the efficiency of pinewood conversion into syngas, while simultaneously facilitating the conversion of gypsum into chemically valuable substances, such as calcium sulfide. During gasification, pinewood generated substantial quantities of tars and unreactive char. Tars, being compounds of considerable stability, present a significant obstacle in terms of achieving high conversion efficiency. The presence of gypsum increased the syngas yield from the conversion of char and tars. The results presented here empirically examined the impact of varying quantities of gypsum on the production of hydrogen (H 2 ) and syngas during its CO 2 -assisted gasification with pinewood. The overall yield of syngas increased by up to 11.7% while the LHV improved by 12.5% using 16.67 wt.% of gypsum in pinewood. However, increased mass fractions of gypsum to 50 wt.% negatively affected the syngas production and reduced the syngas yield and LHV by 22% and 21%, respectively.

Ce résumé expose les affirmations des auteurs. BNTIC ne l’interprète pas comme une validation indépendante des résultats.