As some oil companies slash capital spending, Flint Hills Resources said Thursday it plans to invest $750 million in its Pine Bend refinery in Rosemount to replace or upgrade major equipment and add advanced emission controls.
It will be the largest construction project at the refinery in at least a decade, and at its peak it will employ 2,500 workers, the company said. The planned work, which will need state permits, is expected to start in 2017 and take three years, executives said.
"Our philosophy has been to invest and never stay status quo," said Geoff Glasrud, vice president and manufacturing manager. "It is our company philosophy, and it's in the spirit of all the people we have here."
The planned upgrades are designed to more efficiently process hydrocarbons that have gone through initial refining steps, turning them into ultralow-sulfur motor fuels, he said. The largest investment is the replacement of two 1960s-era coking units and integrated heaters that are a key step in converting asphalt, or "bottoms," into higher-value fuels. The refinery will remain a major asphalt producer, however.
Federal rules already require refineries to produce diesel with less sulfur, a major contributor to diesel particulate emissions. Rules for reducing sulfur in gasoline are being phased in over several years.
During the refinery project, state-of-the-art air-pollution controls also will be installed as the coking and heating units are replaced. Other new, innovative technology will recover waste heat from some processes and use it for other refining steps, reducing cost and emissions while producing cleaner fuel, Glasrud said. The goal is to cut more than 500 tons of nitrogen oxides and other refinery emissions annually.
"Most of this is aimed at efficiency," Glasrud said of the capital projects. "What we are doing to improve efficiency is to recover heat in our own processes. What that does is avoid us having to fire heaters downstream."
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The refinery, built in 1955, has expanded over the decades, and now is the nation's 13th largest, with the capacity to process 339,000 barrels of oil per day. It supplies about half of Minnesota's motor fuel and 40 percent of Wisconsin's. Over the past five years, federal data show, Pine Bend has operated at 80 percent to 87 percent of capacity.