Biomass cofiring will be the focus of a couple of posts since, although rarely-discussed, it is probably the cheapest, easiest, and fastest way to provide new renewable baseload power without having to build any new transmission lines.
I first started analyzing the carbon benefits of cofiring biomass with coal in 1997 when I was overseeing a study by five U.S. national laboratories that examined what an aggressive technology-based strategy built around energy efficiency and renewable energy could achieve in terms of emissions reductions. (See full study here and some history on it by California Energy Commissioner Art Rosenfeld here [PDF].) With supporting analysis done by the Electric Power Research Institute, the Five Lab Study concluded that biomass cofiring was the single biggest potential contributor to near-term greenhouse gas reductions of any renewable energy strategy.
Cofiring is a well demonstrated strategy with multiple benefits. From a practical perspective, most of the existing coal plants are mostly paid off. Plus they are fully permitted and have all the necessary transmission plus they are connected to freight train lines and water supply. Plus this is baseload power. So you avoid all of the problems associated with citing new renewables in the Midwest or Southwest. Cofiring is thus a key near-term strategy for meeting climate goals -- and renewable standards -- in the Midwest and Southeast.
