Technology Description

Straight Run Naphtha Upgrading (Condensate to Gasoline) Technology takes a low octane straight run naphtha or C5 natural Cas liquid steam as a feed and converts it in a fixed bed reactor to an upgraded naphtha stream, LPG and methane. The upgraded Naphtha stream typically has a 25-unit increase in octane and a 90% reduction in the sulfur content compared to the feed. Greater than 75% of the feed is converted to upgraded naphtha with less than 25% of the feed converted to LPG and less than 2% of the feed converted to methane.

The feed is preheated and fed to a fixed bed reactor containing a highly modified proprietary zeolite catalyst. The reactions which occur are a combination of isomerization, polymerization and aromatization. The overall reaction is endothermic. The heat input can be minimized by co-feeding an olefin containing LPG stream or collating the facility with a DTL process.

The product exit the reactor is cooled, fed to a sulfur removal unit and separated into its components.

Key Features

  • Feed is low octane straight run naphtha or C5 natural gas liquid stream (Natural Gasoline)

  • Fixed bed reactor with product fractionation to separate the upgraded naphtha from LPG

  • Typical yield is >75% upgraded naphtha, <25% LPG and <2% Methane

  • ~ 25-point increase in Octane Number

  • Decrease in Vapor pressure; increase in the dry point temperature by 20 to 30 C

  • Removes sulfur without adversely impacting octane (with 110 ppm in feed can achieve <10 ppm. Sulphur removal (>90% efficiency). 

  • Catalyst life is expected to be > 3 years

  • Proprietary Catalyst is a highly-modified Zeolite

  • Co-feed of olefin containing LPG is an option to eliminate/minimize heat input.

  • Co-locating a DTL™ plant (highly exothermic reaction) with Straight Run Upgrading (endothermic reaction) allows both energy integration and CAPEX reduction due to common fractionation equipment.

  • 6 commercial plants licensed in china.

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