Preparation of Pt-Re-Sn /γ- Al2O3 Catalyst for Improvement of Isomerization Reactions Selectivity in Catalysti Reforming Process

Gasoline with euro 5 standard and improvement of selectivity of isomer products to aaromatic products in gasoline is very important in oil refinery. In this paper، Pt-Re-Sn Al2O3 catalyst prepared with imperegnation procedur. Then، The activity and catalytic reactor tests for prepared catalysts and commercial catalyst with same of commercial catalytic reforming process conditions and industrial feed in differential plug flow reactor of catalysis and nano technology division، research institute of petroleum industry pilot plant were done. The composition of Pt and Re in catalyst prepared was 0. 22 and 0. 44 and range of Sn composition was 0. 06،0. 1، 0. 2 and 0. 3 weight percent. After activity test and analysis of products، selectivity of isoparaffins products to aromatics products was compared. The results show that the selectivity of isoparaffin to aromatic products at two different temperatures (490-510 °C) for prepared catalyst with 0. 3 weight percent of tin and commercial catalyst were 39. 5، 29. 7، 4. 4 and 13. 2، Respectively. Finally، comparison of selectivity of four prepared catalysts and commercial catalyst in two operation conditions show that prepared catalyst with 0. 3 weight percent of tin at 490°C is suitable for new catalytic reforming process.