Catalytic Cracking of Heavy Oil over Solid-acid Catalysts

1 CATALYTIC CRACKING OF HEAVY OIL OVER SOLID-ACID CATALYSTS 

The most widely used conventional chemical methods are pyrolysis [21-25] and catalytic cracking [13, 26-30], The latter yields products with a smaller range of carbon numbers and of a higher quality than products generated by the former method. Several types of solid acid catalysts, which are known to be effective for catalytic cracking (e.g. HZSM-5, HY and rare earth metal-exchanged Y-type (REY) zeolite and silica-alumina (SA)) were evaluated by catalyst screening tests and are listed in Table 6.1. The acidic 

A significant amount of C3-C5 gaseous compounds were produced. With the exception of ZSM-5(65) zeolite which favored the production of the C3 fraction, the other catalysts yielded C4 as the main component. 

2 PRODUCTION OF HIGH-OUALITY GASOLINE OVER REY ZEOLITES 

The effects of the reaction conditions and the catalytic properties of REY zeolites on reaction product yields and on the quality of the gasoline can now be examined. 

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