Political Ecology

Sunday, September 5, 2010

Which is the preferable transport fuel on a greenhouse gas basis; biomethane or ethanol?

If either biogas losses were reduced or biomethane was utilised in a vehicular engine optimised for biomethane (such as a bus powered solely on gaseous biofuel) then biomethane would generate significantly more net greenhouse gas savings than ethanol. It was found that if biogas losses were eliminated and the biomethane was used in a vehicle optimised for biomethane, then the net greenhouse gas savings are 2.4 times greater than those from ethanol generated from the same feedstock.

doi:10.1016/j.biombioe.2009.06.004

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