biodiesel
liquid biofuelDESNZ 2025 Biodiesel (ME) — fatty-acid methyl ester. DESNZ lists identical figures for 'from used cooking oil' and 'from tallow' variants, and a separate 'Biodiesel (BtL or HVO)' (NCV 44 MJ/kg, density 780 kg/m³, 0.03558 kgCO2e/L). Scope-1 CO2e (CH4+N2O) separate from biogenic combustion CO2. IPCC 2006 Biodiesels NCV 27.0 MJ/kg (wide range), raw CO2 70,800 kg/TJ.
- Biogenic CO2 from biodiesel combustion is reported on a SEPARATE line ('outside of scopes'), not silently zeroed.
Density
890 kg/m³
at 15 °C (fuel-properties basis)
Heating values
- 37.2 MJ/kg
- 38.7 MJ/kg
Emission factors
- CO₂e 0.16751 kgCO₂e/LScope 1 (direct) · UK · 2025
- biogenic CO₂ 2.39 kgCO₂/Loutside the scopes (biogenic, reported separately) · UK · 2025
| Metric | Value | Scope | Region / year | Source |
|---|---|---|---|---|
| CO₂e | 0.16751 kgCO₂e/L | Scope 1 (direct) | UK · 2025 | |
| biogenic CO₂ | 2.39 kgCO₂/L | 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: 1 L biodiesel converted to every unit
At a glance
- Energy · LHV 9.197 kWh source-based
- Mass 0.89 kg source-based
- CO₂ ~2.39 kg CO₂ region + year
- CO₂e ~0.168 kg CO₂e region + year
All results
Energy
Same energy expressed in other units.
Net calorific value · LHV/NCV
Gross calorific value · HHV/GCV
Mass
Volume
Emissions
CO₂ and CO₂e are separate — never derived from each other.
Energy density
Energy per unit of mass or volume.
Net calorific value · LHV/NCV
Assumptions
- density: assumed biodiesel density 890 kg/m³ at 15 °C (fuel-properties basis)
- heating value basis: energy on LHV/NCV basis, 37.2 MJ/kg
- heating value basis: energy on HHV/GCV basis, 38.7 MJ/kg
Sources
Follow each source back to its primary document — that traceability is the point. How conversions work →