Conception réalisation et évaluation d'un réacteur à plaques milli-structurées pour le couplage autotherme de la déshydrogénation du méthylcyclohexane et de la combustion du toluène

Abstract : Heat exchanger reactor (HER) conception consists on separately studying the two involved reactions with opposite thermicity to define volumes and characteristics of each reactor and doing spatially tally powers to improve HER energetic efficiency. To produce 5mg.s-1 hydrogen at about 370°C, a HER coupling methylcyclohexane dehydrogenation and toluene combustion was designed, built and evaluated. Methylcyclohexane dehydrogenation being slow, first order kinetic law but highly endothermic, the reactor consisted in 2 granular beds containing 9,22g of 0,5%Pt/Al2O3 catalyst, with 4,5mm*3mm of section and 440mm of length. Toluene combustion being rapid and limited by transfer at the wall, the reactor consisted in 6 plates structured with self-supplied 2mm*3mm ducts, coated each with 400mg of 2%Pt/Al2O3. The thermal efficiency was about 90% and exchanged heat flows were about 20 kW.m-2 .
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Isabelle Pitault, Philippe Kerleau, Frédéric Bornette, Valérie Meille. Conception réalisation et évaluation d'un réacteur à plaques milli-structurées pour le couplage autotherme de la déshydrogénation du méthylcyclohexane et de la combustion du toluène. XIIIème congrès de la SFGP : "Des procédés au service du produit au coeur de l'Europe", Nov 2011, Lille, France. ⟨hal-01935850⟩

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