Dioxide Emissions in LPG Cracking

In the CLOSED scenario (in which some of the products are used as fuel or feedstock) there is an excess of methane and hydrogen over 

Unlike the ethane case where the use of hydrogen as furnace fuel greatly reduces the carbon emissions in the CLOSED system, the lower hydrogen production and increased production of methane results in only a small lowering of emission intensity relative to the OPEN system. 

The graph illustrates the sensitivity to a carbon dioxide emission cost, which for a cost of 35/t typically translates to an increase of about 50/t of olefin product. 

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