Insight and inspiration in turbulent times.
I’m glad to see the surge of interest in the coming peak of world oil production, even though the prospect is grim. Once again, people are willing to think about non-renewable resources and the consequences of an economy based on them. ….Most of the new information stems from the work of two little-known scientists, both deceased: petroleum geologist M. King Hubbert and systems ecologist Howard Odum.
Abstract: The last study of the energy balance of producing ethanol from cellulose was back in 1979. It showed that the energy inputs required were 3.3 times the energy contained in the ethanol output. Nevertheless the belief has persisted that producing ethanol from cellulose may become viable. This paper attempts to interpret the most recent plans for improving the process. It concludes that the best plans on the drawing board, at the present time, indicate a positive energy balance, with inputs comprising about 63% of the ethanol output.
