2. Emission factors related to process emissions U.K.
Table 2:
Stoichiometric emission factor for process emissions from carbonate decomposition (Method A)
| Carbonate | Emission factor [t CO2/t Carbonate] |
|---|---|
| CaCO3 | 0,44 |
| MgCO3 | 0,522 |
| Na2CO3 | 0,415 |
| BaCO3 | 0,223 |
| Li2CO3 | 0,596 |
| K2CO3 | 0,318 |
| SrCO3 | 0,298 |
| NaHCO3 | 0,524 |
| FeCO3 | 0,38 |
| General | Emission factor = [M(CO2)]/{Y * [M(x)] + Z *[M(CO3 2-)]} X = metal M(x) = molecular weight of X in [g/mol] M(CO2) = molecular weight of CO2 in [g/mol] M(CO3 2-) = molecular weight of CO3 2- in [g/mol] Y = stoichiometric number of X Z = stoichiometric number of CO3 2- |
Table 3:
Stoichiometric emission factor for process emissions from carbonate decomposition based on alkali earth oxides (Method B)
| Oxide | Emission factor [t CO2/t Oxide] |
|---|---|
| CaO | 0,785 |
| MgO | 1,092 |
| BaO | 0,287 |
| general: XYOZ | Emission factor = [M(CO2)]/{Y * [M(x)] + Z * [M(O)]} X = alkali earth or alkali metal M(x) = molecular weight of X in [g/mol] M(CO2) = molecular weight of CO2 [g/mol] M(O) = molecular weight of O [g/mol] Y = stoichiometric number of X = 1 (for alkali earth metals) = 2 (for alkali metals) Z = stoichiometric number of O = 1 |
Table 4:
Stoichiometric emission factors for process emissions from other process materials (production of iron and steel, and processing of ferrous metals)a
| a IPCC 2006 Guidelines for National Greenhouse Gas Inventories. | ||
| Input or output material | Carbon content(t C/t) | Emission factor(t CO2/t) |
|---|---|---|
| Direct reduced iron (DRI) | 0,0191 | 0,07 |
| EAF carbon electrodes | 0,8188 | 3,0 |
| EAF charge carbon | 0,8297 | 3,04 |
| Hot briquetted iron | 0,0191 | 0,07 |
| Oxygen steel furnace gas | 0,3493 | 1,28 |
| Petroleum coke | 0,8706 | 3,19 |
| Purchased pig iron | 0,0409 | 0,15 |
| Scrap iron | 0,0409 | 0,15 |
| Steel | 0,0109 | 0,04 |
Table 5:
Stoichiometric emission factors for process emissions from other process materials (Bulk organic chemicals)a
| a IPCC 2006 Guidelines for National Greenhouse Gas Inventories. | ||
| Substance | Carbon content(t C/t) | Emission factor(t CO2/t) |
|---|---|---|
| Acetonitril | 0,5852 | 2,144 |
| Acrylonitrile | 0,6664 | 2,442 |
| Butadiene | 0,888 | 3,254 |
| Carbon black | 0,97 | 3,554 |
| Ethylene | 0,856 | 3,136 |
| Ethylene dichloride | 0,245 | 0,898 |
| Ethylene glycol | 0,387 | 1,418 |
| Ethylene oxide | 0,545 | 1,997 |
| Hydrogen cyanide | 0,4444 | 1,628 |
| Methanol | 0,375 | 1,374 |
| Methane | 0,749 | 2,744 |
| Propane | 0,817 | 2,993 |
| Propylene | 0,8563 | 3,137 |
| Vinyl chloride monomer | 0,384 | 1,407 |