Simulation of Biomass Gasification Model for Syngas Production from Wood Residue and Food Wastes
DOI:
https://doi.org/10.38032/scse.2025.3.116Keywords:
Biomass Gasification, Aspen Plus, Syngas Production, Gasification Temperature, Steam-to-Biomass RatioAbstract
Utilizing Aspen Plus, a biomass gasification model has been developed for syngas production from wood residue and food wastes, while steam is used as the gasifying agent. The framework uses the constrained equilibrium approach to Gibbs free energy reduction. This research aimed to examine how essential variables such as reactor temperature and the ratio of steam flow rate with respect to biomass feed flow rate to the gasifier affected the concentration of syngas composition and H₂/CO ratio of the syngas. Biomass is converted to syngas through pretreatment, high-temperature gasification, and impurity removal for versatile energy and chemical applications. Simulations were performed for different biomass feedstocks, specifically wood residues (WR) and food wastes (FW), to predict their syngas compositions like hydrogen (H₂), carbon monoxide (CO), carbon-di-oxide (CO₂), and methane (CH₄) concentrations. Based on this model, the effects of the reactor temperature of the gasifier and steam flow rate concerning the feed flow on syngas yield and lower heating value (LHV) were thoroughly investigated. The mass flow rate, molar fraction, molar flow rate, syngas yield, and LHV were analyzed for WR and FW. The results indicated that the syngas yield was approximately 1.2 Nm³/kg for WR and 1.3 Nm³/kg for FW, with corresponding LHV values around 11 MJ/kg and 12 MJ/kg, respectively. The effects of varying gasification temperature at a fixed S/B ratio (SBR) of 0.6 and adjusting the SBR at a gasifier reactor temperature of 700⁰C were considered. The H₂/CO molar ratio was determined to optimize with shift reaction, yielding a product gas composition with an H2/CO ratio of about 1.9 for WR and 1.3 for FW. These findings highlight the potential for optimizing gasification parameters tailored to specific biomass feedstocks to enhance syngas production efficiency and quality.
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Copyright (c) 2025 Md. Anonno Habib Akash, Md. Shameem Hossain, Md. Nasirul Islam, Kazi Siamul Islam, Shamima Yesmin Sony (Author)
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