ISOMERIZATION OF N-HEXANE OVER PLATINUM LOADED ZEOLITE CATALYSTS

The isomerization of n-hexane over Pt-loaded H beta, H-ZSM-5 and H-dea luminated mordenite was studied at temperatures lower than 573 K under atmospheric pressure. It was found that Pt loaded H beta showed the h ighest activity and selectivity of these three catalysts. Namely, the conversion of hexane was 76 C-% and selectivities to dimethylbutanes, methylpentanes and cracking products were 19.4, 76.2 and 4.4 C-%, resp ectively, under the following conditions: reaction temperature, 548 K; W/F, 5 g h mol(-1); molar ratio of hydrogen to n-hexane, 4. Pt/H beta catalyst showed a good stability, because H beta has acid sites with medium strength and three-dimensional large pores. We can adjust the b alance between metallic sites and acid sites to obtain right catalyst which has the highest activity and the highest selectivity for the iso merization of hexane.