The effects of volatile-char interactions on hydrogen production and tar removal during pyrolysis-catalytic steam reforming of corn straw
The efficient removal of tar and enhancement of hydrogen quality are crucial challenges during biomass targeted thermal conversion for hydrogen production. Biochar-based catalysts have emerged as a promising solution to address these issues. To elucidate the origin of biochar's catalytic activity, the interactions between corn straw volatiles and biochars prepared under various thermal and activation conditions were investigated. The results demonstrate that surface active sites on biochars enhance hydrogen selectivity and yield. Specifically, biochar prepared at 600 °C in an inert atmosphere increased the hydrogen proportion to 58.4% (vol) and hydrogen yield of 29.58 mmol·g−1, primarily due to the promotion of the water-gas shift and steam reforming reactions by oxygen-containing functional groups. Furthermore, tar yield exhibited a strong inverse correlation with the total specific surface area. Using a CO2-activation biochar with a specific surface area of 734 m2·g−1, the tar yield was reduced to 0.50% (mass), as heavy polycyclic aromatic hydrocarbons (PAHs) were depolymerized into lighter species. This study emphasizes the catalytic properties of biochar in biomass steam reforming, revealing its practical potential as a sacrificial catalyst for efficient hydrogen production and laying a foundation for further development of biochar-based catalysts in biomass thermochemical conversion for hydrogen production. © 2026
Библиографическая ссылка Yang, Liu, Yang, Kai, Zhang, Yuming, Li, Jiazhou, Zhang, Wei, Chen, Zhewen, Kozlov A.N., Isa, Yusuf Makarfi, Silva Lora, Electo Eduardo, Li, Wangliang, Zhang, Shu The effects of volatile-char interactions on hydrogen production and tar removal during pyrolysis-catalytic steam reforming of corn straw // Chinese Journal of Chemical Engineering. Vol.98. 2026. P.115-123. DOI: 10.1016/j.cjche.2026.03.016
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