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."