GTL process chemistry

Methane conversion to Syngas (in the case of gas to liquids applications) is the first step for the production of hydrocarbons and follows the global reaction:

2CH4 + O2 → 4H2 + 2CO

 

Syngas can also be generated  via partial oxidation of other Hydrocarbons such as ethane and propane typically present in natural and associated gas via the following equation:

 

CnH(2n+2) + ½ nO2 → (n+1)H2 + nCO

 

Once the Syngas is generated  this is sent to a FT reactor where the Hydrogen and the CO will combine in the presence of a catalyst to finally convert the Syngas into hydrocarbons:

 

(2n+1)H2 + nCOCnH(2n+2) + nH2O

 

The resulting out put is a range of products depending  on the operating temperatures and pressures  in the FT reactor :

 

(2n+1)H2 + nCOCnH(2n+2) + nH2O (Paraffins)

 

2nH2 + nCOCnH2n + nH2O (Oleffins)

 

2nH2 + nCOCnH2n+1OH +  (n-1) H2O (Alcohols)

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