from first principles PP-I-1

PP-IV-4The Selectivity of Methyl Palmitate and Rapeseed Oil Hydroconversionon CoMoS/Al 2 O 3 and NiMoS/Al 2 O 3 CatalystsDeliy I.V. 1,2 , Bukhtiyarova G.A. 1 , Vlasova E.N. 1 , Nuzhdin A.L. 1 , Aleksandrov P.V. 11 Boreskov Institute of Catalysis SB RAS, Novosibirsk, Russia2 Novosibirsk State University, Novosibirsk, Russiagab@catalysis.ruHDO is considered as important commercial rout for producing of distillate range bio-fuelsfrom triglyceride-based feed-stocks such as vegetable oils, animal fats etc. The promisingstrategies to produce hydrocarbons with the required technical and environmental fuelstandards could be the hydrodeoxygenation (HDO) of triglycerides alone or the cohydrotreatmentof triglycerides with petroleum fractions. In both cases the typical HDTcatalysts, like CoMoS/γ-Al 2 O 3 and NiMoS/γ-Al 2 O 3 , can be used. The HDO selectivity (troughthe H 2 O or CO/CO 2 removal) is a crucial factor for the process design and operation.The aim of the present work is a comparison of selectivity of the methyl palmitatetransformation as the model compound on the sulfided CoMo/γ-Al 2 O 3 and NiMo/γ-Al 2 O 3 andthe validation of the obtained results in the hydroconversion process of the rapeseedoil/SRGO blend.The HDO of methyl palmitate were performed in a batch reactor at 300 o C and hydrogenpressure 35 bars over CoMoS/γ-Al 2 O 3 and NiMoS/γ-Al 2 O 3 (0,14-0,25 mm particle size). Thecatalytic properties in HDO of the rapeseed oil/SRGO blend was evaluated in trikle-beddown-flow reactor at 340-360 o C and 4,0 MPa of hydrogen using the full-size granule ofcatalysts (the trilobes with the l=3-5mm, d ~1,2 mm).It was stated that methyl palmitate completely transformed into C 15 and C 16 hydrocarbonsthrough the formation of oxygen- and sulfur-containing intermediate compounds, the tentativereaction scheme of methyl palmitate transformation was considered. It was shown that themain product of HDO of methyl palmitate obtained over CoMoS/γ-Al 2 O 3 catalyst washexadecane whereas pentadecane is preferably formed over NiMoS/γ-Al 2 O 3 catalyst, pointingout to different reaction route of methyl palmitate conversion. The same dependency wasobtained in the case of rapeseed oil hydroprocessing: CoMoS/γ-Al 2 O 3 catalyst providespreferably the direct HDO route, when NiMoS/γ-Al 2 O 3 catalyst support essentially thedecarbonylation/decarboxylation transformation.The research work was supported by RFBR Grant No. 11-03-00611.288