Abstract
In this paper a new field of the application of Pt/SAPO-11 catalyst is introduced. The isomerization of C12-C20 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 H2/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 monoand multibarched paraffins, the place of branchings) (T= 360 °C; p=5060 bar; LHSV 1.0-1.5 h -1 , H2/HC = 350 Nm 3 /m 3 ) high isoparaffin containing mixtures were produced with high liquid yield (>90%) and high i-C12 i-C20 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.
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