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Energy-efficient extraction of fuel and chemical feedstocks from algae

Microscopic algae occupies every photic niche on Earth and provides an efficient and inherently scalable sunlight energy capture and chemical storage mechanism. However, fuel production from algae remains outside economic viability due to limitations in biomass cultivation and feedstock extraction. In particular, extraction strategies require prohibitive energy inputs to breach the cell wall and separate [...]

Additional CO2 emissions from land use change — Forest conservation as a precondition for sustainable production of second generation bioenergy

In the past, deforestation, mainly driven by the conversion of natural forests to agricultural land, contributed up to one-fifth of global human induced carbon dioxide (CO2) emissions. Substitution of bioenergy for fossil energy is an intensely discussed option for mitigating CO2 emissions. This paper, by applying a global land-use model and a global energy–economy–climate model, [...]

Densified Biomass Can Cost-Effectively Mitigate Greenhouse Gas Emissions and Address Energy Security in Thermal Applications

Regional supplies of biomass are currently being evaluated as feedstocks in energy applications to meet renewable portfolio (RPS) and low carbon fuel standards. We investigate the life cycle greenhouse gas (GHG) emissions and associated abatement costs resulting from using densified switchgrass for thermal and electrical energy. In contrast to the large and positive abatement costs [...]

EPA OK’s camelina as advanced biofuels feedstock

In Washington, the EPA has published a proposed direct final rule allowing camelina as a feedstock for advanced biofuels.The rule describes EPA’s evaluation of biofuels produced from camelina oil, energy cane, giant reed, and napiergrass; it also includes an evaluation of renewable gasoline and renewable gasoline blendstocks, as well as biodiesel from esterification, and clarifies [...]

The Big Biofuels Land Grab: Sustainable Development or Neo-Colonialism?

Biofuels Digest senior editor Meghan Sapp, in her other role as Secretary-General of the Europe-based PANGEA (Partners for Euro-African Green Energy), released her organization’s breakthrough report on biofuels and land grabbing in Sub-Saharan Africa, “Land Grab Refocus 2011.” Full Report (pdf)

Group seeks classification as advanced biofuel for energy beets

In 2008, sugarbeets and sugarcane were both classified as advanced biofuel feedstock. However, in 2009 sugarbeets were not listed in the new Renewable Fuel Standard, he said.So the beet team members at NDSU and Green Vision Group have applied for this classification from the Environmental Protection Agency and to request a loan as an advanced [...]

Life Cycle Assessment of Biomass-based Combined Heat and Power Plants

Norway, like many countries, has realized the need to extensively plan its renewable energy future sooner rather than later. Combined heat and power (CHP) through gasification of forest residues is one technology that is expected to aid Norway in achieving a desired doubling of bioenergy production by 2020. To assess the environmental impacts to determine [...]