Friday, July 28, 2006
Gas to Liquid may be solution for stranded Natural gas not LNG
Wikipedia: Gas to liquid or GTL is a refinery process to convert natural gas or other gaseous hydrocarbons into longer-chain hydrocarbons. Methane-rich gases are converted into liquid fuels via the Fischer Tropsch process. Using such processes, refineries can convert some of their gaseous waste products into valuable fuel oils, which can be sold as or blended only with Diesel fuel. This process will be increasingly significant as crude oil resources are depleted, while natural gas supplies are projected to last into the 22nd century.
But LNG gets complicated. Gas gets piped to mammoth plants in places like Qatar and superchilled down to a liquid state. From there it's shipped in special cryogenic tankers to fuel-strained Japan or the U.S., where it goes through a regasification terminal. By comparison, GTL, if it could be made to work, would be easy.
One way to turn methane (natural gas' main ingredient) into liquid fuel is to blend it with pure oxygen under heat and pressure to produce synthesis gas, a mixture of carbon monoxide and hydrogen. With help from a catalyst, the synthesis gas is transformed into waxy hydrocarbons, which in turn can be cracked into smaller, diesel-like fuel molecules. This can all take place out in the gas field, after which transportation is a snap. Unlike diesel derived from crude oil, the synthetic version doesn't require you to replace or upgrade an engine and doesn't emit any sulfur, metals or many particulates when burned. Even the California Energy Commission loves it. Last May it released a report calling synthetic diesel the most effective alternative fuel, above biodiesel and all fuel cells."...more at that article link
http://www.planetark.com/dailynewsstory.cfm/newsid/37426/story.htm
Gas to liquid could be the answer for polluted world.
http://www.btimes.co.za/97/0817/tech/tech.htm
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