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CNG

gas gas

DESNZ 2025 'CNG' — natural gas compressed for vehicle fuel and storage. Chemically the same gas as the 'natural gas' entry, but 175 kg/m³ against 0.802 kg/m³, so a volume of CNG holds 218x the energy of the same volume of pipeline gas. No CO2-only component is recorded for this row in docs/research-notes.md §4.7, so only the CO2e total is carried — CO2 and CO2e are never derived from one another.

  • DESNZ does not state the pressure or temperature its CNG density of 175 kg/m³ refers to. Compressed-gas density depends strongly on both, so treat a volume-based CNG answer as indicative of the DESNZ basis, not of your own tank.

Easily confused with

Different products with different numbers. Check you are on the right one.

Density

175 kg/m³

at compressed (storage pressure per DESNZ fuel-properties sheet; the pressure itself is NOT stated by the source)

Heating values

LHV/NCV
  • 45.745 MJ/kg

HHV/GCV not available — not derived from LHV.

Source for all values above

Emission factors

CO₂ ≠ CO₂e — separate metrics, never converted into one another. What these metrics mean →

Worked example: 1 m³ CNG converted to every unit
Open in converter →
Converting
1 m³ · CNG

At a glance

All results

Energy

Same energy expressed in other units.

Net calorific value · LHV/NCV

LHV vs. HHV — what is the difference?
source-based every figure below
8,005 MJ
2,224 kWh
8.005 GJ
7,588,000 BTU

Mass

175 kg
source-based

Volume

exact every figure below
1,000,000 mL
1,000 L
1 m³
~264.172 US gal
~219.969 imp gal
~6.28981 bbl

Emissions

CO₂ and CO₂e are separate — never derived from each other.

~451 kg CO₂e
region + year

Energy density

Energy per unit of mass or volume.

Net calorific value · LHV/NCV

LHV vs. HHV — what is the difference?
45.74 MJ/kg
source-based

Assumptions

  • density: assumed CNG density 175 kg/m³ at compressed (storage pressure per DESNZ fuel-properties sheet; the pressure itself is NOT stated by the source)
  • heating value basis: energy on LHV/NCV basis, 45.745 MJ/kg

Sources

Follow each source back to its primary document — that traceability is the point. How conversions work →

Sources