Quelltext der Seite CMM Utilisation Opportunities

== CMM Utilisation Opportunities ==

The major part of methane in coal mines is gas deliberating from the broken coal in the surroundings of the longwall and from dug part of the mine. Depending on the quality CMM can be divided into 3 classes of utilisation, as shown in the tabel below.

{| border="1"
 ! width="250px" | High-Quality Gas  

> 50 % CH<sub>4</sub>
 ! width="250px" | Medium-Quality Gas   

25% < CH<sub>4</sub> < 50%
 ! width="250px" | Low-Quality Gas      

< 4% CH<sub>4</sub>
 |-
 |• Natural gas pipelines 


• Vehicle fuel (CNG, LNG) 


• Local distribution (CNG, LNG)

 |• Power generation 
• Heat generation 

• Combined heat & power    generation 

• Boiler fuel 

• Coal mine heating 

• Ventilation air heating 

• Coal drying

• District heating 

• Industrial applications 

• Fuel cells 

 |• Thermal Oxidation 


• Catalytic Oxidation


• Combustion air   
 |}

Of course, the high quality gases are also used instead of the medium quality gases. If CMM is used as a replacement of natural gas a chemical treatment is necessary to conzentrade the methane.