How to use this category
Selecting an emissions scenario
To use this category, select the type of carbide and the basis for the calculation using the type and basis drill choices. Users can choose between calculating:
- on the basis of carbide production
- on the basis on petroleum coke consumption
- in the case of calcium carbide, on the basis of usage in acetylene production
Specifying activity data
Next, specify the quantity of feedstock/product (which ever is appropriate) using the mass profile item value.
Users can override the default emissions factor and specify their own if facility-specific data is available. These can be set using the massCO2PerMass and massCH4PerMass profile item values.
If calculating on the basis of coke consumption (rather than carbide production levels) users can also derive their emissions factor from the carbon content of the coke, should this information be available. To set the carbon concentration, specify a decimal fraction (i.e. 0-1) using the feedstockCarbon profile item value.
The feedstockOxidation profile item value can also be optionally set, describing the level of oxidation acheived for the feedstock, although this defaults to 1 (i.e. 100% oxidation) if left unspecified.
Results and calculation
The returned amounts represent the CO2 and - in case the case of silicon carbide - CH4, emissions associated with the quantities specified. Three quantities are returned, as follows:
- CO2: CO2 emissions
- CH4: CH4 (methane) emissions
- CO2e: CO2e emissions (both gases, converted using these global warming potential)