Acid catalysis for the conversion of pyrolytic vapors of bio oils.
Résumé
The attractive valorization of biomass by fast pyrolysis is facing the drawback of the oxygen content and acidity of the bio oil which induce a high cost of the further upgrading processes for biofuels production. Therefore, several strategies have been proposed for removing at a low cost much of the oxygen and acids. Thus, catalytic pyrolysis can be directly performed in the reactor [ ] or in a close coupled reactor which performs the conversion of the pyrolytic gases after filtration. In the present work, we have built a falling reactor which performs the pyrolysis with a close fixed bed containing the catalyst. Recovery of the bio oils fractions, gases, chars leads to a mass balance higher than 95%. A screening of acidic catalysts (zeolites, silica alumina) has been performed in this test. In depth characterization of liquids and solids was done.