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Cold flow properties improvement process. Catalytic dewaxing is used to improve cold flow properties of diesel fuels by selective hydroisomerization and hydrocracking of normal and slightly branched-paraffins. Normal paraffins have the most detrimental effects on the low-temperature properties of diesel fuels. Even with lower end boiling points as expected from forthcoming specifications in Western Europe, remaining paraffins in diesel fuels may still be a problem in reaching acceptable cold flow properties without expensive additivation. This problem becomes even more important in countries where additives package are not commercially an attractive option and where local weather conditions force the use of extreme winter gas oils (arctic) grades. The Shell Catalytic Dewaxing processes reduce the amount and/or chain-length of normal and slightly-branched paraffins, the cold flow properties of diesel fuels strongly improve.
The growing interest in cold flow improvement technologies stems from increasingly stringent engine specifications, processing of more paraffinic crudes, and selling the products at markets with demanding cold flow property specifications. Catalytic dewaxing is an established and reliable process for improving the cold flow properties of diesel. During the process “wax” is selectively removed from the feed by conversion (as opposed to solvent dewaxing, which extracts waxes) into isomerized and cracked molecules. With specifically developed proprietary catalyst formulations issued from our Research & Testing Facilities across the globe, Shell Dewaxing Technologies offer the best diesel yields, significantly reduced naphtha production and an unbeaten on-stream stability combined with operating flexibility.
Have you considered how you can
· Build in your unit feedstock and product slate flexibility during winter to maximise return?
· Fine-tune process condition and catalyst configuration to improve cold flow properties at minimum investment cost?
· Optimise your unit operation in a reliable manner to tune your product quality and product slate in response to market demand and fluctuations?
The growing interest in cold flow improvement technologies stems from increasingly stringent engine specifications, processing of more paraffinic crudes, and selling the products at markets with demanding cold flow property specifications. Catalytic dewaxing is an established and reliable process for improving the cold flow properties of diesel. During the process “wax” is selectively removed from the feed by conversion (as opposed to solvent dewaxing, which extracts waxes) into isomerized and cracked molecules. With specifically developed proprietary catalyst formulations issued from our Research & Testing Facilities across the globe, Shell Dewaxing Technologies offer the best diesel yields, significantly reduced naphtha production and an unbeaten on-stream stability combined with operating flexibility.
Have you considered how you can
· Build in your unit feedstock and product slate flexibility during winter to maximise return?
· Fine-tune process condition and catalyst configuration to improve cold flow properties at minimum investment cost?
· Optimise your unit operation in a reliable manner to tune your product quality and product slate in response to market demand and fluctuations?
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Shell Global Solutions International
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