Biomass Burning Fuels
View All Projects

Biomass Burning Fuels


Direct biomass combustion (solid fuel internal combustion) eliminates much of the costly fuel processing associated with making either bio-oils, ethanol, or standard gasifiers

To effectively achieve direct biomass combustion in a gas turbine, Brayton’s approach burns the solid fuel at atmospheric pressure in the turbine exhaust, thereby preventing erosion in the turbine section, and simplifying the fuel delivery system. The high-temperature reaction zone provides very complete combustion and low emission levels.

Brayton’s design entails a two stage centrifugal compressor with a 1.2 MW two stage axial turbine combined with an intercooled externally-fired Recuperated System.

Burning media and torrefied samples

Testing at Brayton’s Combustion Lab(1MW – thermal = 1/4th scale)

Commercial Applications

Business case for EPS1200 modular
biomass-electricity power plant

  1. Detailed product studies indicate a significant demand for a mid-size, high reliability power plant to convert biomass to electricity.
  2. More reliable vs piston engines
  3. More economical (capital and O&M) vs steam turbines
  4. A small (1 MW) scale direct biomass plant can be ‘invisible’ to the local community
  5. Ultra-low pollution emissions

Intercooled Recuperated Gas Turbine
with two operating points

  • 1.2MW to 30 C on natural gas or liquid fuel
  • 900 kWe on solid biomass (Back-heated)
  • Variable speed drive for improved part-load efficiency, hot-day power rating, and provide ample starting power.
  • Efficiency = 40% LHV electric w/natural gas
  • Efficiency = 24% LHV Solid fuel combustion
  • Gas turbine combustion:
    – CARB compliant emissions with conventional and bio-fuels
    – US EPA compliant emissions with solid fuel combustion