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Date: February 9, 2015
Source: University of California - Berkeley
Summary: Biomass conversion to electricity combined with technologies for capturing and storing carbon, which should become viable within 35 years, could result in a carbon-negative power grid in the western US by 2050. That prediction comes from an analysis of various fuel scenarios. Bioenergy with carbon capture and sequestration may be a better use of plant feedstocks than making biofuels.
Generating electricity from biomass, such as urban waste and sustainably-sourced forest and crop residues, is one strategy for reducing greenhouse gas emissions, because it is carbon-neutral: it produces as much carbon as the plants suck out of the atmosphere.
A new UC Berkeley study shows that if biomass electricity production is combined with carbon capture and sequestration in the western United States, power generators could actually store more carbon than they emit and make a critical contribution to an overall zero-carbon future by the second half of the 21st century.
By capturing carbon from burning biomass -- termed bioenergy with carbon capture and sequestration (BECCS) -- power generators could become carbon-negative even while retaining gas- or coal-burning plants. The carbon reduction might even offset the emissions from fossil fuel used in transportation, said study leader Daniel Sanchez, a graduate student in UC Berkeley's Energy and Resources Group.
"There are a lot of commercial uncertainties about carbon capture and sequestration technologies," Sanchez admitted. "Nevertheless, we're taking this technology and showing that in the Western United States 35 years from now, BECCS doesn't merely let you reduce emissions by 80 percent -- the...click here to continue.
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