Modeling of Biogas Tri-Reforming for Hydrogen Production

Abstract:

In recent years, particular attention has been paid to the use of renewable energy, particularly biomass, for reasons related to both climate change and waste management. Biogas is frequently used in low value-added applications such as heating and fuel in engines, while it can be reformed into hydrogen, through certain process such as the process of dry reforming, of partial oxidation, of bi-reforming, or even of tri-reforming. The literature has indicated that the tri-reforming process is better than other reforming processes. Biogas tri-reforming is a simultaneous combination of endothermic dry reforming and steam reforming with exothermic methane oxidation, carried out in a single reactor to produce syngas which is an important feedstock for chemical production and energy vectors. Second, the process of tri-reforming overcomes several weaknesses of each main reform process. This article presents a new mathematical model of tri-reforming which will further optimize this type of process. The developed mathematical model was validated with literature data. Thus, the literature data used are among others, the optimal feed ratio in the tri-reforming process, CH₄/CO₂/H₂O/O₂ = 1:0.291:0.576:0.088. For optimal temperature and pressure, the data used are 1223 K and 5 bar respectively. This mathematical model makes it possible to achieve high conversion of methane (CH₄) and carbon dioxide (CO₂) coupled with high selectivity in hydrogen. The conversion rate of methane (CH₄) can reach 99% and that of carbon dioxide (CO₂) can reach 97%. The model is adapted with a high hydrogen selectivity: 2.88.

• Periodical: Advanced Engineering Forum (Volume 54)
• Pages: 29-55
• DOI: https://doi.org/10.4028/p-TOj3Zb
• Online since: January 2025
• Authors: Mathieu Mahougnon Kakpo*, Safiou Bouraima, Evrard Karol Ekouedjen, Gaston Ganhoun, Farid Adamon, Latif Adéniyi Fagbemi
• Keywords: Biogas, Biomass, Hydrogen Selectivity, Mathematical Model, Renewable Energy, Tri-Reforming

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