1225 CHEMICAL ENGINEERING TRANSACTIONS Volume 21, 2010 Editor J. J. Klemeš, H. L. Lam, P. S. Varbanov Copyright © 2010, AIDIC Servizi S.r.l., ISBN 978-88-95608-05-1 ISSN 1974-9791 DOI: 10.3303/CET1021205 Please cite this article as: Kasza T., Holló A., Thernesz A. and Hancsók J., (2010), Production of bio gas oil from bioparaffins over pt/sapo-11, Chemical Engineering Transactions, 21, 1225-1230 DOI: 10.3303/CET1021205 Production of Bio Gas Oil from Bioparaffins over Pt/SAPO-11 Tamás Kasza 1 , András Holló 2 , Artur Thernesz 2 , Jenő Hancsók 1 * 1 MOL Department of Hydrocarbon and Coal Processing, University of Pannonia P.O. Box 158., 8201, Veszprém, Hungary. 2 MOL Hungarian Oil and Gas Plc., Hungary hancsokj@almos.uni-pannon.hu In this paper a new field of the application of Pt/SAPO-11 catalyst is introduced. The isomerization of C 12 -C 20 paraffin mixtures produced from rapeseed oil was investigated over different platinum containing (0.2; 0.3; 0.4; 0.5; 0.7; 1.0 %) SAPO-11 catalysts at 300-400°C, 30-80 bar; 0.5-4.0 h -1 LHSV and 200-800 Nm 3 /m 3 H 2 /HC ratio. It was concluded that economically the most favourable results (high isomer content at high yield) could be obtained using SAPO-11 catalyst with 0.4 % platinum content. At the favourable operational parameters (determined in compromise by the product yield, the ratio of mono- and multibarched paraffins, the place of branchings) (T= 360 °C; p=50- 60 bar; LHSV 1.0-1.5 h -1 , H 2 /HC = 350 Nm 3 /m 3 ) high isoparaffin containing mixtures were produced with high liquid yield (>90%) and high i-C 12 - i-C 20 selectivity. The cetane numbers of these products were 75-85 units (EU Standard value is ≥51), and the cold filter plugging points were between -2 and -11 °C. 1. Introduction The energy demand of the world is continually increasing because of the industrial and population growth. Consequently the importance of biofuels has increased in the last decade (Hayes, 2009). Another important reason is the lower CO 2 emission of biofuels relative to conventional fuels regarding the whole life cycle. Nowadays the transesterified vegetable oils (biodiesels) are mainly used as a renewable diesel fuel blending component, which has several disadvantages [e.g. depositions in the fuel system and the combustion chamber; bad storage (oxidation and heat) stability because of the olefinic double bonds; aptitude to water intake; hydrolysis sensitivity of the ester bonds, which generate corrosive acids; etc.] (Hancsók et al., 2007), consequently the maximum blending quantity of the fatty acid methyl esthers is limited to 7.0 V/V% in the EN 590:2009 standard by the suggestion of the car manufacturers. Consequently the quantity of biofuels could only be increased by using hydrocarbons with different conformation (e.g. mixtures of paraffins) produced from triglycerides, fatty acid, etc., which satisfies better the application requirements of the diesel vehicles (engines) (Hancsók et al., 2007). However, these paraffin mixtures (mainly n-C 12 – n- C 20 ) have unfavourable cold flow properties (CFPP) (e.g. n-C 16 : +17 °C), accordingly