Construction began on December 1, 2005 at PRSI to produce Low Sulfur Gasoline using ConocoPhillips
licensed S Zorb technology. The unit is expected to be complete in late 2006.
Completion of this unit will allow PRSI to meet government low sulfur gasoline specifications.
PRSI Low Sulfur Gasoline Unit
We began the Low Sulfur Gasoline Project upon the purchase of Crown Central Petroleum's Pasadena
refinery by Pasadena Refining System, Inc. in January 2005. Crown had negotiated an absorption
technology license, S Zorb, with ConocoPhillips which became
effective when PRSI purchased the refinery. This unit is designed to treat 40,000
BPD of full range FCC naphtha containing up to 1100 ppmw sulfur. Low sulfur gasoline
production is federally mandated to be in operation by mid-2007.
An existing Reformer unit was isolated and demolished in 2005 to provide the site
for this project. Charles Waligura, former president of the Houston Chapter of Project
Management Institute, is PRSI's project manager. Greg Krouse is his assistant project
manager. Fluor Enterprises is engineering and managing the construction of the ISBL
work. BEI Engineers is engineering the OSBL work and the OSBL construction management
is by PRSI.
In February 2007, our Low Sulfur Gasoline Unit is scheduled to begin operations.
ConocoPhillips S Zorb Sulfur Removal Technology is designed to remove sulfur to
ultra-low levels without sacrificing product quality or quantity, while still complying
with the stringent requirements of government regulations.
Sulfur removal is usually done by hydro-treating FCC naphtha. This can result in
hydrogenation and octane loss. S Zorb minimizes octane loss. Some processes produce
low sulfur numbers at the expense of total output.
S Zorb output is nearly 100% of the feed and does not produce light ends.
Since the S Zorb process is not a hydro-treating technology, high hydrogen costs are