Emissions from refinery processes

Refineries manufacture petroleum products for fuel and for non-energy uses, and in doing so produce hydrogen and other gases, intermediate products and basic chemicals. The CO2 emissions from fuel consumed by the refinery for this activity are reported as Energy Sector emissions. This principle is maintained in the Guidelines even when some fuel use in the refinery is to support manufacture of chemicals for sale (for example, propylene or aromatics). The manufacture of basic chemicals in refineries is a normal occurrence usually through the treatment of by-products of mainstream manufacture and they may be used in other refinery processes or transferred to adjoining petrochemical works. However, in some circumstances the demand for basic chemicals may cause the refinery to adjust production processes to increase supply of the chemical and sell directly into the market. Despite this activity the fuel use to support all processes is still considered as refinery fuel and the emissions as Energy Sector emissions. It is important to recognise that the production for sale of basic chemicals in refineries is considered a secondary activity distinct from the manufacture of chemicals in adjoining or co-located petrochemical works. This is consistent with the separate statistical classification of the two economic activities.

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