Mine gases treatment for electric power generation

Mine gas is a more environmentally friendly and efficient fuel than coal.

Mine gas is a powerful energy fuel. However, its calorific value is largely dependent on the methane concentration in it.

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Dependence of mine gas calorific value on methane concentration

Methane concentration in mine gas (%)3040500708090
Calorific value (MJ/kg)10.514.317.821.324.728.532.1

In most cases, methane concentration in mine gas ranges within 35–40% vol. For use as a fuel, gas shall have the lower calorific value of at least 16.0 MJ/m³ which corresponds to the CH4 content of 46% vol.

A similar situation (impossibility of direct gas use as a fuel due to its extremely low calorific value) exists with regard to associated petroleum gas (APG) showing high nitrogen content (in some cases up to 90% vol.).

Grasys membrane plants allow treating mine gas as well as associated petroleum gas with high nitrogen content for further use as a fuel at gas-fired reciprocating plants and gas turbine power plants, boiler houses.

The use of Grasys membrane technology makes it possible to significantly improve fuel gas quality by

  • Reducing the calorific value by 1.5–2 times
  • Reducing the nitrogen concentration by 10–35% vol.
  • Increasing the methane number
  • Producing the gas meeting the fuel requirements for gas-fired reciprocating plants and gas turbine power plants
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