Gasification is considered an incomplete combustion. This is necessary to bring down the emissions of NOX and SOX, better known as acid rain.

Gasification (click here) is most simply thought of as choked combustion or incomplete combustion. It is burning solid fuels like wood or coal without enough air to complete combustion, so the output gas still has combustion potential. The unburned gas is then piped away to burn elsewhere as needed.

Gas produced by this method goes by a variety of names: wood gas, syngas, producer gas, town gas, generator gas, and others. It’s sometimes also called biogas, though biogas more typically refers to gas produced via microbes in anaerobic digestion. In the context of biomass gasification using air-aspirated gasifiers, the term producer gas is the term we will be using, since the other terms have implications that do not necessarily apply to the gas produced by our gasifiers....

...Gasification is made up for five discrete thermal processes: Drying, Pyrolysis, Combustion, Cracking, and Reduction...

Acid rain” (click here) (Acid Snow) became a household term in the 1980s when unchecked emissions from industry and motor vehicles were blamed for causing environmental deterioration. Scientific evidence has linked acid rain to decreased fish and wildlife populations, degraded lakes and streams, and human health hazards. Although the term has since faded from public consciousness, acid rain is a complex and global problem that still exists today.