lignite
solid coalLignite (brown coal) uses the IPCC's 2006 global default figures. DESNZ groups coal by how it's used rather than by geological rank, so we use the IPCC's rank-based tables (Table 1.2 for calorific value, Table 2.2 for emissions) instead. No density is given in the source, so volume conversions are not available. The IPCC table only provides a net calorific value (NCV), not a higher heating value (HHV, also called gross calorific value or GCV), so that figure is shown as 'not available' too.
- Lignite is extremely variable (moisture/ash): the IPCC net calorific value has a 95% range of 5.5–21.6 MJ/kg. Treat any lignite energy figure as a rough estimate. No density available → volume conversions not available.
Easily confused with
Different products with different numbers. Check you are on the right one.
- hard coal 2.39528994 kgCO₂e/kg
- anthracite
Density
Not available.
Heating values
- 11.9 MJ/kg
HHV/GCV not available — not derived from LHV.
Emission factors
- CO₂ 101 kgCO₂/GJdirect combustion · global · 2006
| Metric | Value | Scope | Region / year | Source |
|---|---|---|---|---|
| CO₂ | 101 kgCO₂/GJ | direct combustion | global · 2006 |
CO₂ ≠ CO₂e — separate metrics, never converted into one another. What these metrics mean →
Worked example: 1 kg lignite converted to every unit
At a glance
All results
Energy
Same energy expressed in other units.
Net calorific value · LHV/NCV
Mass
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
- heating value basis: energy on LHV/NCV basis, 11.9 MJ/kg
Sources
Follow each source back to its primary document — that traceability is the point. How conversions work →