Dual flow reactor for acid gas cracking and methane conversion simulation with COMSOL Multiphysics®

J.-D. Wheeler1, E. Thiebaut2, G. Veryasov2, P. Namy1
1SIMTEC, Grenoble, France
2TotalEnergies OneTech Belgium, Feluy, Belgium
Veröffentlicht in 2026

The chemical industry faces increasing pressure to reduce energy consumption and greenhouse gas emissions. Traditional reactor designs often require external heating or cooling, leading to significant energy losses. A promising approach is the dual-flow reactor, which integrates an exothermal and an endothermal reaction within a single heat exchanger-like structure. This design enables direct heat transfer between the two reaction zones, minimizing external energy demand and enhancing process efficiency. In this study, a comprehensive model of such a dual-flow reactor is developed using COMSOL Multiphysics. The model couples turbulent flow, heat transfer, and reaction kinetics to simulate the interaction between the exothermal and endothermal reaction zones. The reactor geometry is designed to ensure thermal contact without mass transfer between the two streams, allowing for efficient heat exchange and process intensification. The model is used to investigate the impact of key parameters, including reactor dimensions, mass flow rates, and the selection of reaction pairs. For this, H2S based and CH4 based reactions are investigated. The results demonstrate the potential of the dual-flow reactor concept to significantly reduce energy requirements in industrial processes, paving the way for more sustainable chemical production.

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