Gasification integrated with steam co-reforming of agricultural waste biomass over its derived CO2/O2/steam-mediated porous biochar for boosting H2-rich syngas production

Abstract

This study proposed a novel concept of producing H2-rich syngas and eliminating tar formation via biomass gasification integrated with inline steam co-reforming (BGSCR). Initially, direct gasification of wheat straw in diverse gasifying agents was conducted to produce CO2/O2/steam-mediated porous biochar materials (PBMs), which were innovatively used as catalytic reforming agents and co-reactants for BGSCR process. With the aid of gasifying agents, the surface structures of PBMs were apparently fabricated with more micropores. Particularly, C[steam] achieved the highest surface area (502 m2/g) and total pore volume (0.297 cm3/g). Further, catalytic reforming temperature and type of PBMs were examined in relation to gas formation behaviors during BGSCR process. The maximum gas yield (58.53 mmol/g), H2 yield (28.29 mmol/g), and syngas yield (45.96 mmol/g) were achieved in the presence of C[10%O2]. Simply put, this study presents a promising gasification route to directly integrate H2-enriched syngas generation and in-situ tar abatement with biochar reutilization.