Mise au point de nanomatériaux catalytiques pour la lutte contre la pollution. application a la production de biocarburant

Abstract

In this work, we are interested in the valorization of lignocellulosic biomass into biofuel by the direct hydrodeoxygenation process in One pot catalysed by on ruthenium based materials supported on silica -aluminas . The food of the process, 1,5-bis (2furanyl) -1,4-pentadien-3-one (FAF) is synthesized from furfural and acetone. The effect of acidity, metal content and the effect of metal/support interaction on the hydrodeoxygenation reaction of FAF were studied. To this end, silica-aluminas with different Si / Al ratios (2.5; 4; 7; 15) were ruthenium nanoparticles are deposited, were synthesized and then characterized by: X-ray diffraction, thermal analysis, measurement of acidity followed by infrared spectroscopy, nitrogen adsorption / desorption, electron microscopy, X-ray fluorescence. The optimization of catalytic performance and their physicochemical properties made it possible to perform the hydrodeoxygenation reaction in one-pot, producing at 80 % mixture of hydrocarbons in the range of Diesel and Jet Fuel. The identification by gas chromatography coupled with mass spectroscopy of the many reaction products has allowed proposing a reaction path for the HDO process.