Nickel-loaded red mud catalyst for steam gasification of bamboo sawdust to produce hydrogen-rich syngas

Ni/red mud (RM) catalysts were prepared by wet impregnation and used in the catalytic steam gasification of bamboo sawdust (BS) to produce hydrogen-rich syngas. The system was optimized in terms of the amount of added nickel (10%), reaction temperature (800 & DEG;C), and catalyst placement (separately behind the BS). The maximum H2 yield was 17.3% higher than that using pure RM catalyst and 43.8% higher than that of BS gasification alone, and the H2/CO ratio in the syngas reached 7.82. This Ni/RM catalyst also retained good activity after six cycles in a double-stage fixed bed reactor. Analysis using X-ray fluores-cence, X-ray diffraction, scanning electron microscopy-energy dispersive spectroscopy, and other methods revealed that the interaction of Ni, Fe, and Mg in Ni/RM produced bimetallic compounds containing active sites, such as NiFe2O4, MgNiO2, and NiO. This explains the good catalytic performance in the tar conversion during the gasification process. & COPY; 2023 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.

Automated summary

Ni/red mud (RM) catalysts were prepared and used for catalytic steam gasification of bamboo sawdust (BS) to produce hydrogen-rich syngas. The system was optimized with 10% added nickel, a reaction temperature of 800°C, and catalyst placement behind the BS. The Ni/RM catalyst showed higher H2 yield and H2/CO ratio compared to pure RM catalyst or BS gasification alone, and retained good activity after six cycles.