What is Producer gas?

Producer gas is fuel gas that is manufactured from material such as coal, as opposed to natural gas. It can be produced from various fuels by partial combustion with air, usually modified by simultaneous injection of water or steam to maintain a constant temperature and obtain a higher heat content gas by enrichment of air gas with hydrogen.

Producer gas is a low-grade fuel gas that consists largely of nitrogen and carbon monoxide, formed by passing air, or air and steam, through red-hot carbon. It is often manufactured from material such as coal, as opposed to natural gas (es).