EFFECT OF OPERATION CONDITIONS ON THE BEHAVIOR OF ZSM-5 ADDITION TO A RE-USY FCC CATALYST

被引：25

作者：

ELIA, MF ^{[1
]}

IGLESIAS, E ^{[1
]}

MARTINEZ, A ^{[1
]}

PASCUAL, MAP ^{[1
]}

机构：

[1] CEPSA, CTR INVEST, PICOS EUROPA 7, E-28850 SAN FERNANDO, SPAIN

来源：

APPLIED CATALYSIS | 1991年 / 73卷 / 02期

关键词：

FCC; OPERATING CONDITIONS; RARE-EARTHS; ZEOLITES; ZSM-5;

D O I：

10.1016/0166-9834(91)85137-K

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The effect of the addition of ZSM-5 to an ultra-stabilized RE-USY fluid catalytic cracking (FCC) catalyst has been studied in a DCR (Davison continuous riser) pilot plant, that closely matches a commercial unit. The lower gasoline yield obtained after ZSM-5 addition is a consequence of selective cracking of most of the low octane number components, rendering a highly olefinic LPG. Our study, at two different severities (505 and 520-degrees-C), revealed that the octane boost in the gasoline fraction can be explained by three reasons: the previously mentioned selective removal, a concentration effect of naphtenes and aromatics and, particularly, the increase of specific light C5-C6 components. This last effect depends on cracking severity. Rather than being due to a concentration effect, the increase of light branched and olefinic high octane number components is more intense at lower severities.

引用

页码：195 / 216

页数：22

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