Simulation software helps Silver Eagle Refining meet Benzene emission regulations

PLANO, TEXAS, USA – March 17, 2008 – Invensys Process Systems and Silver Eagle Refining Inc., an independent Rocky Mountain area Independent Petroleum Refiner located in Woods Cross Utah, have successfully applied simulation software in meeting upcoming Environmental Protection Agency (EPA) Mobile Source Air Toxics (MSAT) requirements for benzene emissions. An engineering team composed of specialists from both companies collaborated on implementation of Simsci-Esscor PRO/II simulation software with Koch-Glitsch’s RATEFRAC sizing methodology to size petroleum distillation columns and air-cooled exchangers in their new Isomerization and BenSat Units.

“The new EPA regulations are prompting refiners to rethink their processes and in doing so, they are finding that advanced simulation and modeling software can help them comply with regulations cost-effectively, while improving also their operating efficiency. By offering powerful RATEFRAC column sizing functionality within our PRO/II simulation and modeling software, we provide an integrated solution that is not available from any other single supplier,” said Joseph McMullen, PRO/II product manager for Invensys.

The EPA classifies MSATs as hazardous air pollutants resulting from non-point sources. They contribute to ozone formation and possible addition of particulate matter to the environment. Targeted MSATs include benzene, 1,3-butadiene, formaldehyde, acetaldehyde, acrolein, and naphthalene.

Of all MSATs, benzene, a known carcinogen linked to leukemia, is among the most notorious. In regulations issued recently, the EPA requires that all refiners limit the annual average benzene content of reformulated and conventional gasoline to .62 percent of volume by January 1, 2011.

“We modeled our future benzene isomerization and saturation units ourselves, using SimSci-Esscor PRO/II software, but to be certain that we did it right, we contracted also with Invensys to perform the same analysis with the PRO/II software. I was deliberately cryptic in the beginning because I didn't want our results to skew theirs, but was comforted to see that they came up with similar results. The PRO/II software has definitely helped us verify that the changes we are making will meet the benzene regulations,” said Silver Eagle Refining process engineer, Joe Brown.

PRO/II software, SimSci-Esscor’s steady-state simulator, helps meet the new requirements by applying the RATEFRAC methodology to achieve accurate and realistic column design. The RATEFRAC module in the PRO/II software is a rigorous rate-based distillation model that is used in applications where the approach to equilibrium is limited by heat and mass transfer rates. RATEFRAC allows for simulation of all types of multistage vapor-liquid columns. Through the use of a rigorous mass transfer methodology PRO/II with RATEFRAC determines both a bulk and interface composition and determines height equivalent to theoretical plate (HETP) ratios in the packing and performance of trayed sections from the column configuration.

About Silver Eagle Refining
Silver Eagle Refining, Inc., based in Woods Cross, Utah, manufactures refinery gas fuels, fuel additives, lubricants, and anticorrosive materials.

About Koch-Glitsch
Koch-Glitsch, LP is a global leader in the design and manufacture of state-of-the-art mass transfer and mist elimination products for the chemical, petrochemical, refining, gas processing, pharmaceutical, and specialty industries. Koch Glitsch offers a complete line of products, including high performance and conventional distillation trays; grid, structured and random packing in metal or plastic; tower internals; mist eliminators and replacement hardware for distillation, absorption, stripping and extraction columns.

About Invensys Process Systems
Invensys Process Systems, headquartered in Plano, Texas, is the world leader in industrial asset performance management, a strategy designed to help today's industrial enterprises to effectively balance the availability and utilization of their production assets to match changing business requirements. Invensys Process Systems encompasses industry-leading brands such as InFusion, Foxboro, Triconex, SimSci-Esscor and Avantis and provides advanced products, services, and solutions to industrial facilities around the world. These range from small hybrid and batch plants to include many of the world’s largest upstream operations, refineries, chemical plants, pharmaceutical and biotechnology plants, gas plants, LNG plants, power plants, mineral processing plants, and pulp and paper mills.

The Invensys Group (www.invensys.com) is headquartered in London and is listed on the London Stock Exchange (ISYS.L), with approximately 25,000 employees working in 60 countries.

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