Qi BioEnergy

Colorado biomass potential

Posted in Colorado BioEnergy, biomass by qibioenergy on March 27th, 2008

Agricultural residues are the biomass materials remaining after harvesting agricultural crops. These residues include wheat straw, corn stover (leaves, stalks, and cobs), orchard trimmings, rice straw and husks, and bagasse (sugar cane residue). Due to the high costs for recovering most agricultural residues, they are not yet widely used for energy purposes; however, they can offer a sizeable biomass resource if supply infrastructures are developed to economically recover and deliver them to energy facilities. An estimated 2,524,000 dry tons per year is available from corn stover and wheat straw in Colorado.

Crop Production Maps

Posted in Colorado BioEnergy, biomass by qibioenergy on March 27th, 2008

The Next Biorefineries

Posted in Bioenergy, Cellulose ethanol, biomass by qibioenergy on March 27th, 2008

Pulp and paper mills, many of which were built in the 1800s, haven’t changed much in their many decades of operation. Of Course, product improvements and process efficiencies have been developed and implemented, but the basic infrastructure and purpose of the mills remain the same. All this is about to change as pulp and paper mills are positioned to become the next biorefineries.

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Black Liquor

Posted in Bioenergy, Cellulose ethanol, biomass by qibioenergy on March 27th, 2008
Black liquor is a biomass feedstock with unique properties.
First of all, it is available at existing industrial sites in large quantities.
Secondly it is a liquid. This makes it possibly to easily feed it by pumping into the pressurized gasifier. With biomass in solid or pulverized form this becomes significantly more difficult. The liquid state also makes the black liquor easy to atomize into a fine mist that reacts very fast in the gasifier.
Thirdly, the gasification of black liquor char is more rapid than for any other feedstock as the inherently high sodium and potassium content of black liquor acts as a catalyst.
These properties makes it possible to apply the high temperature, entrained flow gasification principle to black liquor. This type of gasification process provides many advantages over alternative gasification technologies:
  • It is a very rapid, single-stage gasification process with low reactor volume
  • It minimizes the need for raw syngas clean-up as the Chemrec process directly provides a raw syngas of excellent quality with
  • Complete carbon conversion
  • No tar formation
  • Low methane content