The Moss fluidized bed combustion system can be used on many different boiler or dryer systems. Because of stricter emission regulations in the United States as well as other nations and the need to combust more difficult fuels for energy production, this is the combustion system of the future. This combustion system can burn dry or wet solid fuels and/or gases and liquids. Fuels from wood, sludge's, coals, tires, rice hulls, corn products, cow manure, chicken or turkey litter, cotton seed hulls, coffee grounds, dried distillers grains (DDGS), etc., can be burned in this very flexible combustion system.

Fluidized bed combustion (FBC) is a combustion technology used for burning renewable biomass green energy (i.e., wood and various biomass fuels) and traditional coals (lignite, sub-bituminous, bituminous and anthracite) along with various other fuels. The Moss fluidized bed combustion system utilizes bubbling fluidized bed technology where solid fuels are suspended on upward-blowing jets of air during the combustion process resulting in a turbulent mixing of gas and solids. The tumbling action resembles a bubbling fluid that promotes a more effective chemical reaction and energy release.

Fluidized-bed combustion evolved from efforts to find a combustion process that was able to control pollutant emissions, while minimizing external expensive emission controls (such as SNCR, SCR, electrostatic precipitators, scrubbers, baghouses, etc.). The fluid bed technology burns fuel at approximate temperatures of 1,400 to 1,700 F (750 - 900 C), well below the temperature threshold where nitrogen oxides form (in the approximate range of 2,500 F./1400 C). The bubbling fluidized bed normally operates in a reducing atmosphere (less air than is needed for combustion - similar to a Moss gasifier system) and normally is used to burn lower-quality fuels with high volatile matter. Furthermore, the bubbling fluidized bed keeps most of the bed media in the lower section of the system. The scrubbing action of the bed media on the fuel particles enhances the combustion process by stripping away the char layers that normally form around the fuel particles. This allows oxygen to reach the fuel faster and increases the rate and efficiency of the combustion process. The turbulence in the fluidized bed free board space (area above the last entry of overfire air) combined with the turbulent mixing effect and thermal action of the bed material promotes complete and consistent combustion. These factors are important to maximizing thermal efficiency and controlling stack emissions.

When burning coal, our fluidized bed combustion technology reduces the amount of sulfur emitted in the form of SOx emissions, by using limestone or other similar sorbent materials as the bed media (precipitates out the sulfate during the combustion process). More than 95% of the sulfur pollutants in coal can be captured inside the boiler by limestone or other sulfate absorbing materials. These clean flue gases come in direct contact with the pressure vessel tubes increasing efficiency. Since this process allows coal fluidized bed combustion systems to burn at cooler temperatures, lower NOx emissions are emitted.

The bed is comprised of an inert material (typically sand or crushed limestone - depending on the fuels to be burned) that is preheated to approximately 1500 F. prior to the fuel being injected. This combustion system provides the capabilities of burning unusual and difficult fuels and also promotes low exit stack gas emissions. Fuels are pneumatically or mechanically transferred over the fuel bed or augured into the combustion system below the fuel bed where the fuel is quickly volatized with a low emission heat being released to the boiler or dryer system.