Gum formation tendencies of olefinic structures in gasoline and synergistic effect of sulphur compounds
- Indian Institute of Petroleum, Dehradun (India)
The high octane gasoline pool contains varying amounts of cracked naphthas as an important ingredient in formulating high octane lead free gasoline. The cracked naphthas are largely from Fluidized Catalytic Cracking (FCC) units and to lesser extend from thermal cracking units. While the role of olefinic unsaturation in gum formation during storage of gasoline has been extensively studied, there is little published work on contribution of individual olefin types in storage stability and gum formation tendency of gasoline containing these compound types. In the present work we report our results on storage stability and gum formation tendency of different olefin types present in cracked naphthas through model compound matrix. It is found that cyclic olefins and cyclic diolefins are the most prolific gum formers. We have also studied the role of sulfur compounds present in the gasolines on gum formation tendency of olefins. While thiols enhance gum formation from all olefinic types, sulfides and disulfides interact depending on the structure of olefins. These can have either an accelerating, or inhibiting effect on gum formation.
- Research Organization:
- USDOE Assistant Secretary for Fossil Energy, Washington, DC (United States). Office of Technical Management
- OSTI ID:
- 68687
- Report Number(s):
- CONF-941022--Vol.2; ON: DE95009411
- Country of Publication:
- United States
- Language:
- English
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