biogas
gas biofuelDESNZ 2025 Biogas. Related DESNZ products: Biomethane (NCV 49 MJ/kg, density 0.725 kg/m³) and Landfill Gas (NCV 12.3 MJ/kg, density 1.3 kg/m³) — not separately catalogued in v0.1. Scope-1 CO2e (CH4+N2O) separate from biogenic combustion CO2. IPCC 2006 Other Biogas NCV 50.4 MJ/kg (methane-theoretical, wide range), raw CO2 54,600 kg/TJ. Note DESNZ biogas NCV (20 MJ/kg) is much lower than IPCC's (raw methane basis) because biogas is CO2-diluted.
- Biogas energy content varies with its methane fraction (typically 50–70% CH4, balance CO2). The figure is representative.
- Biogenic CO2 from biogas combustion is reported on a SEPARATE line ('outside of scopes'), not silently zeroed.
Easily confused with
Different products with different numbers. Check you are on the right one.
- natural gas 0.802 kg/m³ 2.06672 kgCO2e/m3
- methane 0.716 kg/m³
Density
1.15 kg/m³
at gas phase; reference T/P NOT stated by DESNZ
Heating values
Emission factors
| Metric | Value | Scope | Region / year | Source |
|---|---|---|---|---|
| CO₂e | 0.00124314 kgCO2e/kg | Scope 1 (direct) | UK · 2025 | |
| biogenic CO₂ | 1.1056695 kgCO2/kg | outside the scopes (biogenic, reported separately) | UK · 2025 |
CO₂ ≠ CO₂e — separate metrics, never converted into one another.Biogenic CO₂ is listed on its own line: the carbon still leaves the stack, but it is accounted for separately from fossil CO₂ rather than added to it. What these metrics mean →
Worked example
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Energy
Same energy expressed in other units.
Mass
Volume
Emissions
CO₂ and CO₂e are separate — never derived from each other.
Energy density
Energy per unit of mass or volume.
Assumptions
- density: assumed biogas density 1.15 kg/m³ at gas phase; reference T/P NOT stated by DESNZ
- heating value basis: energy on LHV/NCV basis, 20 MJ/kg
- heating value basis: energy on HHV/GCV basis, 21.978 MJ/kg
Sources
Follow each source back to its primary document — that traceability is the point. How conversions work →