Friday, June 11, 2010

Co-locating Ethanol biorefineries and coal-fired power plants

The cellulose and hemicellulose from plant material can be an ethanol feedstock, while the lignin is great for buring in a power plant. Excess steam and heat from the power plant can be used in producing ethanol.
Cellulosic Ethanol and Power Plant Co-Location: Savings in Synergy - Ethanol Producer Magazine: "Our process modeling showed that in situations where a green electricity premium of $30 per MWh is charged, an ethanol price of approximately $2.10 per gallon (before any ethanol subsidies) is the break-even point for a co-location producer. Ethanol prices above this amount will allow the producer to make more money producing ethanol from just the cellulose and hemicellulose (and burning the lignin separately for power) than by burning the whole biomass feedstock."

Thursday, March 25, 2010

CRP Croplands could yield ethanol fuel while maintaining ecological benefits

CRP is the Conservation Reserve Program. The government pays farmers to maintain certain fields in grasses or trees. Often, this is land that is too steep for row cropping without extensive erosion. At first glance, you would think that removing biomass from these fields every year would reduce soil fertility. Actually, this is not necessarily so. Some plants, including most grasses, are stimulated to grow more strongly by mowing or grazing. This greater biological activity leads to tapping more nutrient reserves from deep in the earth and from the air. Bacteria and fungi work in symbiosis with plant roots to extract nitrogen from the air and from certain soil particles. These nutrients are translated into plant mass and greater organic matter in the soil.
Estimating Ethanol Yields from CRP Croplands / March 19, 2010 / Newsfrom the USDA Agricultural Research Service: "This extensive study also shows that CRP lands in the northeastern United States with a high proportion of tall native prairie grasses have the potential to produce more than 600 gallons of ethanol per acre. This energy can be produced while maintaining the ecological benefits of CRP grasslands."

Wednesday, March 17, 2010

Ethanol-Optimized Engine getting closer

The octane and oxygen advantages of ethanol can overcome the fuel economy deficit. But it requires an engine designed to take advantage of these factors. Such an engine would be a game-changer in the automotive and energy world. The CEO of Growth Energy talks about their prototype engine:
Ethanol-Optimized Engine A Major Breakthrough for Producers - Ethanol Producer Magazine: "And, at blends of E40 to E50, the EBDI engine improves on the fuel economy of regular gasoline engines by as much as 10 percent. Think about that: One of the biggest criticisms of ethanol is that engines lose mileage when burning ethanol. But this engine proves that the problem isn’t the fuel—it’s the engine."

Wednesday, January 06, 2010

Syngas from waste being delivered to cellulosic ethanol biorefinery

Through a plasma gasification process this facility is able to provide syngas with the right composition for conversion to ethanol. The feedstock can vary in composition, and this syngas could be tailored for other uses such as generating electricity. If plasma gasification proves viable on a large scale, it could provide the flexibility needed for large-scale utilization of waste products on a commercially viable basis.
ALTER NRG CORP. Alter NRG Corp. announces the Westinghouse Plasma Centre is delivering clean syngas to Coskata's ethanol facility: "Coskata's proprietary process was analyzed by Argonne National Laboratory, who found that every unit of fossil energy used, in turn generated up to 7.7 times the amount of energy which is significantly better than the current ethanol industry. It was also found that it reduces CO(2) emissions by up to 96 percent compared with a well-to-wheel analysis of gasoline. The feedstock-flexible process utilizes non- food biomass, thereby providing an opportunity to produce fuel-grade ethanol in greater quantities and at a lower cost point than that produced from food-based sources (corn, sugar, etc.)."