Title : Integrated pyrolysis-reforming approach for efficient hydrogen-rich syngas production from biomass
Abstract:
Biomass pyrolysis is a promising thermochemical pathway for converting renewable feedstocks into valuable gaseous fuels; however, the direct utilization of pyrolysis vapors is hindered by the presence of tar and oxygenated compounds. In this study, an integrated two-stage process involving biomass pyrolysis followed by catalytic reforming was investigated to improve hydrogen production. Pyrolysis of lignocellulosic biomass was carried out to generate volatile intermediates, which were subsequently upgraded over a bimetallic catalytic system supported on CaO-based materials. The catalyst was designed to provide active reforming sites along with in-situ CO2 capture functionality, thereby promoting sorption-enhanced reforming reactions. The presence of a basic support contributed to improved gas quality by shifting the reaction equilibrium toward hydrogen formation, while the bimetallic active phase facilitated the decomposition of complex hydrocarbons and tar compounds. The effects of reaction parameters, including temperature and biomass type, were systematically studied to understand their influence on product distribution. The results showed a notable enhancement in hydrogen yield along with a reduction in undesired by-products. Additionally, the catalytic system demonstrated improved resistance to carbon deposition, indicating stable performance during operation. The enhanced activity is attributed to the synergistic interaction between the active metal phase and the basic support, which promotes reforming and water-gas shift reactions. This study demonstrates an effective strategy for upgrading biomass-derived vapors into hydrogen-rich gas, contributing to sustainable and decentralized energy production.
