Hydrogen Production Enhancement in Pine Sawdust Gasification by Numerical and Experimental Methods

Document Type : Original Article

Authors

1 Mansoura University, Department of Agricultural Engineering, Mansoura 35516, Egypt

2 Institute for Energy Engineering, Technical University of Berlin, Berlin 10587, Germany

3 Zhejiang University, Department of Biosystems Engineering, Hangzhou 310058, China

Abstract

This research comprehensively investigates hydrogen production optimization in pine sawdust gasification through integrated numerical simulation and experimental validation. The numerical model, developed using Aspen Plus®, demonstrated exceptional correlation with experimental data (R² > 0.95) at 800°C, validating its predictive capability. Parametric analysis revealed that elevating the reaction temperature from 600°C to 800°C significantly enhanced H₂ concentration from 31.12 vol% to 35.11 vol%, primarily due to the acceleration of endothermic water-gas shift (WGS) and steam reforming reactions. The equivalence ratio (ER) exhibited an inverse relationship with H₂ yield, where increasing ER from 0.2 to 0.4 resulted in a substantial decrease in H₂ concentration from 37.61 vol% to 30.07 vol%, attributed to the diminished steam availability for reforming reactions. Furthermore, augmentation of the steam-to-biomass (S/B) ratio from 0.5 to 1.7 facilitated increased H₂ concentration from 35.28 vol% to 37.22 vol%, owing to enhanced steam reforming and WGS reaction kinetics. Through multi-parameter optimization, optimal conditions were established at temperature: 750-800°C, ER: 0.2-0.25, and S/B ratio: 1.1-1.4, achieving maximum H₂ concentrations of 36-38 vol%.

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