Less Expensive Gas to Liquids Conversion

Tuesday, April 7, 2015 @ 07:04 PM gHale


It is now possible to inexpensively convert natural gas to gasoline, diesel and other liquids.

San Francisco-based Siluria Technologies uses a catalyst to convert methane into ethylene, a building block for petrochemicals, and then another catalyst to turn that into liquids, primarily gasoline, said Chief Executive Ed Dineen.

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“It’s a technology the industry has long sought after,” said Dineen, who was formerly chief operating officer of chemicals company LyondellBasell Industries NV.

With backing from Saudi Aramco and partnerships with well-known industry players including the Linde Group and Brazilian petrochemical company Braskem, Dineen hopes to break into natural gas processing with improvements that make the decades-old technology economical.

A less expensive way to turn natural gas into motor fuels could potentially benefit consumers, as natural gas is far cheaper and more plentiful than crude oil.

Abundant domestic natural gas from the shale boom prompted plans by Royal Dutch Shell and South African petrochemicals company Sasol for gas-to-liquids projects that use a different process, known as Fischer-Tropsch.

But Shell in 2013 shelved a potential gas-to-liquids plant in Louisiana when the cost spiked to $20 billion, and Sasol in January delayed its final decision on whether to build a similar project in the same state after oil prices tumbled.

Fischer-Tropsch has high start-up and operating costs that involve breaking natural gas apart into a synthetic gas, which can convert into liquids, Dineen said.

He worked on that technology three decades ago with Arco in Alaska, where natural gas from the Prudhoe Bay oilfield ended up stranded because of a lack of pipeline infrastructure to move it to markets.

Among the challenges were the need to operate at such high temperatures that safety and costs became a concern, Dineen said. Also, some catalysts worked the first time but then fell apart, he said.

Innovations including nanowire technology to test catalysts quickly speeds up trial-and-error testing, making it more efficient to find what works at a more affordable cost, Dineen said.

Siluria has been testing the technology at California facilities for several years, and more recently at Braskem’s demonstration plant in La Porte, near Houston. The company aims to commercialize within two years.



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