Effects of basic feedstock components on FCC gasoline composition
Conference
·
OSTI ID:215015
The effect of basic feedstock components on composition of gasoline produced from a bench scale fluid catalytic cracking (FCC) unit was studied. Basic compounds were isolated from 650-1000{degrees}F and >1000{degrees}F boiling ranges of Wilmington, CA, crude oil. These basic concentrates were added in varying amounts to a conventional gas oil FCC feedstock; the resulting mixtures were cracked at 970{degrees}F and a catalyst/oil ratio near 8.5. Gasoline composition was determined by GC/MS. Production of gasoline-range nitrogen-containing compounds from cracking basic feed constituents was negligible, even for feedstocks containing 50 wt% basic concentrate. However, the proportion of olefin and cycloolefin types substantially increased in gasolines from feedstocks containing 650-1000{degrees}F bases. Commensurate decreases in isoparaffins and aromatic types were also observed. The effect of high boiling (>1000{degrees}F) bases on gasoline composition was relatively small; a slight increase in aromatic content accompanied by a decrease in isoparaffin content were observed. Basic compounds appear to affect gasoline composition largely through inhibition of catalytic hydrogen transfer processes.
- OSTI ID:
- 215015
- Report Number(s):
- CONF-950801--
- Country of Publication:
- United States
- Language:
- English
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