Production of Bio Gas Oil from Bioparaffins over Pt/SAPO-11

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 degrees 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 degrees 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 degrees C.