Carbide production

[/business/processes/production/carbide]

The category at business/processes/production/carbide provides a methodology for calculating greenhouse gas emissions associated with the production and use of silicon and calcium carbide. The methodology provides two ways to calculate, based on either: (1) the quantity of feedstock inputs (coke) to the production process; or (2) the quantity of carbide produced. This methodology represents the Tier 1 (default values) and Tier 2 (facility- or country-specific values) approaches described by the IPCC Guidelines for National Greenhouse Gas Inventories (NGGIP).

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)

The individual quantity for CH₄ represents an absolute quantity rather than a CO₂e quantity.

	UID	Label
	O0IBEN5ZRHZO	calcium carbide, carbide production
	5TDM0MNP9NV8	calcium carbide, coke consumption
	G4V4MD08JTGX	calcium carbide, usage (acetylene production)
	S6NFGQBUXPF5	silicon carbide, carbide production
	JGDCB8BCNXUR	silicon carbide, coke consumption

Name: Carbide_production

Full path: /business/processes/production/carbide

Parent Category: Processes production

Provenance: NGGIP

acetylene calculation carbide coke direct emission_factor EPA EPA_mandatory EPA_mandatory_silicon_carbide global IPCC IPCC_industry IPCC_industry_carbide IPCC_tier1 IPCC_tier2 mass_balance