OP-II-3

PP-III-53following process parameters were applied: T= 275-375 °C, P=40-100 bar,LHSV=1.0-3.0 h -1 , H 2 /hydrocarbon ratio: 400-800 Nm 3 /m 3 . The composition of theproducts was determined by gas chromatography.From the catalysts with different carriers the best results were gained on thePt/AlSBA-15 catalyst. On this catalyst and with increasing temperature the yield ofliquid products (C 5+ ) decreased, but until 325 °C this value was above 95% in everycase. But on the Pt/beta catalyst the amount of gas products increased significantlyover 300 °C. In case of of both catalysts in the gas products mainly branchedisobutane was identified, which indicated that the cracking enacted partly after theisomerization reactions. The isoparaffin contents of the liquid products (Figure 1) inthe function of process parameters increased with increasing temperature anddecreased with increasing pressure and LHSV in every case while other parameterswere kept constant, but - as we mentioned earlier -. On the Pt/beta the yield of liquidproducts was not sufficient. Based on the isoparaffin contents of the differentfractions produced on Pt/AlSBA-15 it can be concluded that at advantageous processparameter combinations (T=300-325 °C, P=40-70 bar, LHSV=1.0-2.0 h -1 / T=275-300°C, P=40-70 bar, LHSV=1.0-2.0 h -1 ) the catalyst was applicable to produce C 11 -C 20and C 21 -C 30 fractions with high isoparaffin content (63.5-85.6% / 34.1-58.7%) withadequate yields (29.9-36.6% / 46.2-58.8%).To summarize it, it was concluded that the catalysts with AlSBA-15 carriershowed the better results in the production of gas oil and base oil fractions with highisoparaffin content from Fischer-Tropsch wax, because of its higher isomerizationand milder cracking activity. The selectivity of the target product fractions was high,and based on these facts the selective isomerization of the Fischer-Tropsch wax is anew application area of the Pt/AlSBA-15 catalyst.References[1]. Zhou, Z., Zhang, Y., Tierney, J.W.: „Producing fuels from Fischer-Tropsch waxes”, PTQ, 2004, 4,137-143.[2]. Vosloo, A.C.: „Fischer-Tropsch: A futuristic view”, Fuel Processing Technology, 2001, 71, 149-155.[3]. C. Bouchy, G. Hastoy, E. Guillon, J.A. Martens: „Fischer-Tropsch Waxes Upgrading viaHydrocracking and Selective Hydroisomerization”, Oil & Gas Science and Technology, 2009, 64,91-112.[4]. Deldari, H.: „Suitable catalysts for hydroisomerization of long-chain normal paraffins”, Appl. Catal.A: General, 2005, 293, 1-10.[5]. Rosetti, I., Gambaro, C., Calemma, V.: „Hydrocracking of long chain linear paraffins”, ChemicalEngineering Journal, 2009, 154, 295-301.[6]. Soualah, A., Lemberton, J.L., Pinard, L., Chater, M., Magnoux, P., Moljord, K.:“Hydroisomerization of long-chain n-alkanes on bifunctional Pt/zeolite catalysts: Effect of thezeolite structure on the product selectivity and on the reaction mechanism”, Appl. Catal. A:General, 2008, 336, 23-28.538