Allegro BiodieselÂ recently acquired a minority stakeÂ inÂ Littleton, Colorado bioenergy company Community Power Corporation (CPC).Â Allegro is interested in CPC because of itsÂ technology for converting biomass to clean energy.
GasificationÂ technology converts carbon-based biomass feedstocks, such as wood chips, to gas or other usable fuel, which can then beÂ used to generateÂ electricity.Â Â CPC has developed a gasification system that can produce heat and power from a wide variety of biomass feedstocks.Â Â Â CPC’s gasifier isÂ called the BioMax Power System biomax.pdf, and the company has filed a patent application for the technology.Â
U.S. Application No. 2007/0006528 covers a modular, portable gasifier that provides better control and monitoring of operations, more effective gas cooling, and less pollution (typically tar) than prior gasifying techniques.Â Â The gasifier eliminates the tar from the raw material by pyrolysis (heating without oxygen or other reagents).Â Â According toÂ CPC’s patentÂ application,Â a significant innovation isÂ theÂ gasifier’sÂ multi-layer air injection system, which senses temperature at each layer and adjusts the temperature accordingly at each layer to achieve consistently high gas quality and ultra-low tar levels. Â The system has multiple nozzles to injectÂ oxidizing gasÂ in the prescribed amounts at different locations to create optimal conditions.Â After the tar is released, the remaining carbonaceous material (called char) is ignited and thereby converted to a low tar fuel gas.