Research Letter
Corporate Ecological Footprint: New Conversion Factors
Table 1
New fuel conversion indices used to calculate corporate ecological footprints.
| Fuel | Forest absorption rate
(/ha/year) | Emission factor with oxidation factor
(/Gj) | “Energy
productivity” of forests (Gj/ha/year) |
| Solids | | | |
| Anthracite | 3.6666 | 0.0973 | 37.7 | Lignite | 3.6666 | 0.1002 | 36.6 | Coal
for coke making | 3.6666 | 0.0937 | 39.1 | Other
bitumen. coal | 3.6666 | 0.0937 | 39.1 | Tyres
(cement factories) | 3.6666 | 0.0820 | 44.7 |
| Liquids | | | |
| Gas-oil | 3.6666 | 0.0737 | 49.8 | Gasoline | 3.6666 | 0.0690 | 53.1 | Fuel
oil | 3.6666 | 0.0760 | 48.2 | General LPG | 3.6666 | 0.0650 | 56.4 | Kerosene (not for aircraft) | 3.6666 | 0.0715 | 51.3 | Oil
coke | 3.6666 | 0.0983 | 37.3 | Oils & lubricants | 3.6666 | 0.0729 | 50.3 | Solvents (cement factories) | 3.6666 | 0.0830 | 44.2 | Used oil (cement factories) | 3.6666 | 0.0730 | 50.2 |
| Gas | | | |
| Natural gas (dry) | 3.6666 | 0.0560 | 65.5 | Butane | 3.6666 | 0.0662 | 55.4 | Methane | 3.6666 | 0.0546 | 67.2 | Propane | 3.6666 | 0.0636 | 57.7 | Carbon
Monoxide | 3.6666 | 0.1540 | 23.8 | Hydrogen | 3.6666 | 0.0000 | 0 |
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Source:
“España. Informe Inventarios” GEI 1990–2004 (May 2006).http://portal.aragon.es/portal/page/portal/MEDIOAMBIENTE/CALIDAD_AMBIENTAL/CCLIMA/INFORMES/INVENTARIOEMISIONESGEI_1990–2004.PDF (last access: June/2008).
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