| Popis: |
The energy need is increasing due to rapid developingtechnologies and growing population in today's world. Fossil based fuel demandis increasing which results in the increase of the harmful gases causing airpollution. Bio-fuels are produced as aresult of the pyrolysis of biomass. They are acknowledged among clean andrenewable energy sources for use as an alternative energy source tofossil-based fuels in motor vehicles. However, one of the biggest problems inbiofuel production is carbon deposition during the reactions. Within the scopeof this study, catalysts that are resistant to carbon formation and hence willbe active for longer periods of time have been developed. Mesoporous gammaalumina support material was synthesized by hydrothermal (EISA) synthesismethod and catalyst structure was achieved via wet impregnating zirconium, tantalumand nickel to increase surface acidity. The wide-angle XRD patterns and SEM-EDSanalysis of the mesoporous γ−Al2O3 materials indicated anintact preserved structure containing the desired amount of metals. Nitrogenadsorption-desorption isotherms of the synthesized catalysts were found to be compatiblewith the Type IV isotherm, validating formation of a mesoporous structure accordingto the IUPAC classification. Active metal-containing mesoporous alumina catalystswere tested in bio-oil-to-biofuel production reactions. The reaction studieswere carried out in a continuous flow packed bed reactor system with anethanol/reactant volumetric ratio of 70/30, using 0.5 g catalyst at 400 oC.The highest bio-fuel selectivities and bio-oilconversions were obtained in the presence of zirconia containing catalysts. Theresults of the study showed that the use of mesoporous alumina material inbio-oil-to-biofuel production reactions was promising. Financialsupport of TÜBİTAK 219Z232 was gratefully acknowledged.Keywords: Mesoporousalümina, Active Metals, Bio-fuel, Bio-mass |
