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Oil tanks and the Bayway Refinery of Phillips 66 is seen in Linden, N.J., on March 30, 2020.MIKE SEGAR/Reuters

Refiners have always produced fuel using crude oil. Now some are using grease.

A slump in demand for gasoline since the onset of the coronavirus pandemic has several refining companies accelerating their plans to retrofit facilities to produce so-called renewable diesel made from, among other things, used cooking oil from fast-food restaurants.

The shift helps, they say, because it allows them to tap into lucrative federal and state incentives for production of low carbon fuels at a time when slumping fuel demand has squeezed profit margins for conventional fuels such as gasoline.

Companies that have recently announced moves to produce renewable diesel include CVR Energy Inc., Marathon Petroleum Corp., Phillips 66 and HollyFrontier Corp., according to a Reuters review of company earnings statements in the first half of 2020.

The planned conversion of Phillips 66′s refinery in Rodeo, Calif., for example, is “expected to deliver strong returns through the sale of high value products while lowering the plant’s operating costs,” the company said in a statement.

The project is not expected to come online until 2024.

Renewable diesel fuel burns cleaner than conventional diesel and can run without blending. Refiners can produce it by converting gasoline-making units to hydrotreaters that can process soybean oil or used cooking grease.

In California, such a conversion can mean big money. Under the state’s Low Carbon Fuel Standard (LCFS), refiners can generate tradable credits by producing renewable diesel because it has a lower carbon intensity than fossil fuels, and sell them to other fuel producers for profit.

Oregon has a similar credit program, and several other U.S. states are also developing standards.

“California’s LCFS program is currently a key driver of renewable diesel production,” said Charles Kemp, refining consultant at Baker O’Brien, which estimates that renewable diesel will make up 20 per cent of California’s diesel pool in 2020 and that the percentage will double by 2030.

Federal policy has also encouraged refiners to produce renewable diesel through incentives such as a blender’s credit of US$1 a gallon expiring in 2022. The industry expects more federal incentives for renewables if Democratic presidential candidate Joe Biden, a proponent of efforts to fight climate change, wins the presidency in November.

The United States now consumes 21.4 million barrels of renewable diesel a year, a fraction of the 4.1 million barrels used every day for conventional distillate fuel oil, according to U.S. Energy Department data.

If all the renewable diesel projects that have been announced so far come online, it could take roughly 300,000 barrels a day or more of crude-based refined products out of the market, according to estimates by energy intelligence firm Genscape.

The timing for taking down gasoline units for retrofitting is good for some refiners.

Gasoline demand is down about 10 per cent from a year ago owing to the pandemic, though it still makes up a major chunk of refinery production and has historically been a money maker.

The biggest hurdle for refiners seeking to produce renewable diesel could be locating enough grease.

Renewable diesel made from animal fats and used cooking oil provide more credits under California’s low carbon fuel program than that made from soybean oil, because it is considered less carbon-intensive, but soybean oil is much more plentiful.

U.S. animal fat and used cooking oil production, for example, has grown about 4.5 per cent since 2011 to about 54 million barrels a year, according to the National Renderers Association. Soybean oil production, by contrast, has increased by 26 per cent to about 105 million barrels a year, according to the U.S. Agriculture Department.

Refiner Valero Energy Corp. has locked in a supply agreement for animal fats and used cooking oil with Darling Ingredients Inc., while Neste Corp., a renewable fuels producer, bought Mahoney Environmental Inc., a company that collects used cooking oil in 31 states.

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