Collect. Czech. Chem. Commun. 1987, 52, 1545-1549

Determination of the hydrocracking and hydroisomerization activities of catalysts containing zeolites Y and ZSM-5 for high boiling hydrocarbons conversion

Jolanta R. Grzechowiak and Aleksandra Masalska

Institute of Chemistry and Technology of Petroleum and Coal, Technical University of Wrocław, Poland


Hydrocracking, hydroisomerization activities and selectivities were investigated using silica-alumina, silica-alumina-Y, and silica-alumina-ZSM-5 catalysts. The results show that white oil cracking activity of H-ZSM-5-containing catalyst is much higher than the cracking activity of H-Y. The work has shown that it is possible to carry out hydrocracking process at temperature 593-613 K and space velocity 2-3 h-1 (pressure 5·1 MPa, H2 : CH = 500 Nm3 m-3 h-1) using H-ZSM-5 containing catalysts. In such conditions, 76-84 wt. % of liquid product from white oil was obtained. After removing the low boiling fraction (below the initial boiling point of the feed), the lowering of the freezing point from 252 to 235 K was noticed.