From the fine description of gasification in fixed bed to the optimization of staged processes

In this HDR (Accreditation to Supervise Research) report, after an overview of his curriculum (diplomas, research, expertise, administrative and education activities), the author presents the context and industrial problematic of gasification (definition, existing technologies, status of industrial development), and scientific stakes (processes of staged gasification, industrial stakes, scientific approach and stakes). Then, he proposes an overview of his research works related to the gasification of an isolated coal particle: tools and methodology, application to a spherical char particle in a water steam atmosphere, description of the various occurring phenomena. In a next part, he addresses coal gasification in continuous fixed bed: fine characterization of the fixed bed (design of a research reactor, contributions of the main reactions, evolution of physical magnitudes along the char bed, bed settlement during gasification), and modelling (with application to the optimisation of an industrial reactor). In a last part, the author presents an assessment and projects which concern: biomass oxidising pyrolysis in continuous fixed bed, behaviour of pellets of biomass mixtures, and gasification in southern countries with a scale reduction