Fill ‘er up with coal? California company says it has a better coal to liquids process

A California company says it has discovered a new way to make liquid fuel from coal without consuming water or producing carbon dioxide.

SRI International said researchers used natural gas to provide hydrogen needed to convert coal to “syngas” – a mixture of carbon monoxide and hydrogen – which is converted to methanol for use as transportation fuels.

The process differs from conventional coal-to-liquids (CTL) technology which SRI says produces only a fraction of the hydrocarbons needed for fuel and requires extensive recycling.

The company claims the capital costs for a plant using its technology would be less than half of a conventional CTL plant.

“The implications of this research are expansive, including enhancing US energy security through the use of domestic carbon sources,” said Robert Wilson, director, Chemical Science and Technology Laboratory at SRI International. “The process can also dramatically reduce the environmental footprint associated with alternative transportation fuels.”

According to the World Coal Association, coal can be turned into a liquid and used as an alternative to oil using two methods, direct liquefaction or indirect liquefaction. The latter is the “syngas” method described above.

Petroleum and diesel can be produced, as well as synthetic waxes, lubricants, chemical feedstocks, methanol and dimethyl ether (DME).

South Africa is the only country with a commercially-viable CTL industry. Coal-derived fuel supplies about 30% of the country’s gasoline and diesel needs.

 

 

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