Emissions for Gas and Coal to Olefins

The base statistics for the lines in the figure are for a gas price of 2/GJ and a coal price of 0.5/GJ. These give production costs in the vicinity of 200/t for both cases in the absence of carbon charges. 

The graph shows that a 40/tonne carbon dioxide charge will increase the production cost from coal by approximately 25% to around 250/t. For the same impact on gas based operations, a carbon dioxide cost of 70/t will be required. 

3 Perry s Chemical Engineer s Handbook, 7 Edition (Perry Green, eds.), McGraw Hill 1997 

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