Absorption sélective des goudrons issus de la gazéification : application au laveur Venturi d'une unité de cogénération biomasse

Abstract : Among biomass conversion processes, air gasification has the advantage of an attractive electrical conversion yield, especially for small powers. However, the elimination of the generated tar remains a lock to lift to allow the industrial emergence of the gasification process. The treatment by absorption is considered to be technologically mature but the choice of cleaning solvent, its management and the optimization of the scrubber represent a crucial element. In order to highlight possible solvents, a fast and robust solvents screening methodology based on a multi-criteria analysis was developed. Comparison of more than 100 of conventional solvents allowed to forward two solvents. To investigate performance of these solvents, a pilot scale Venturi scrubber (compact scrubber with a large Interfacial area and low risk fouling risk) has been designed and characterized. The experimental study on real raw gas allowed to study the evolution of the tar loading factor in the solvent and to measure treatment efficiencies of solvents on benzene, naphthalene, anthracene and pyrene. These experimental data were then used to validate the modelling of the Venturi scrubber in the context of optimization and extrapolation on the industrial scale of the washing unit. In order to estimate the cost of treatment in €/ MWh, the sizing of the equipment on an industrial scale has been made for two solvents in different cases in order to process to a technico-economical evaluation.
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  • HAL Id : tel-01751792, version 1

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Eve Masurel. Absorption sélective des goudrons issus de la gazéification : application au laveur Venturi d'une unité de cogénération biomasse. Alimentation et Nutrition. Université de Lorraine, 2015. Français. ⟨NNT : 2015LORR0096⟩. ⟨tel-01751792⟩

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