Biogas is a 100% renewable fuel with exceptional environmental standards. Using locally produced waste to produce a fuel for heavy duty vehicles in public transport contributes to a sustainable development and a climate neutral transport sector.
Energy Facts
The energy content of biogas depends on the concentration of methane. See below the energy content in biogas in relation to other fuels.
| The energy content of different fuels: |
| 1 Nm3 biogas (97 % methane) = 9.67 kWh |
| 1 Nm3 natural gas = 11.0 kWh |
| 1 litre petrol = 9.06 kWh |
| 1 litre diesel = 9.8 kWh |
| 1 litre E85 = 6.6 kWh |
| 1 Nm3 biogas is equivalent to ca. 1.1 litres of petrol. |
| 1 Nm3 natural gas is equivalent to ca. 1.2 litres petrol. |
| |
Content of biogas
The content of biogas depends on various factors, i.e. the production process, the raw material used for anaerobic digestion etc. Typical for biogas is that the gas contains methane and carbon dioxide. See comparison between landfill gas, biogas from anaerobic digestion and natural gas below.
| |
|
Landfill gas |
Biogas from AD |
Natural gas |
| Calorific value, lower |
MJ/Nm³ |
16 |
23 |
40 |
| |
kWh/Nm³ |
4.4 |
6.5 |
11 |
| |
MJ/kg |
12.3 |
20.2 |
48 |
| Density |
kg/Nm³ |
1.3 |
1.2 |
0.83 |
| Wobbe index, upper |
MJ/Nm³ |
18 |
27 |
55 |
| Methane number |
|
>130 |
>135 |
72 |
| |
|
|
|
|
| Methane |
vol-% |
45 |
65 |
89 |
| Methane, range |
vol-% |
35-65 |
60-70 |
- |
| Long-chain hydrocarbons |
vol-% |
0 |
0 |
10 |
| Hydrogen |
vol-% |
0-3 |
0 |
0 |
| Carbon monoxide |
vol-% |
0 |
0 |
0 |
| Carbon dioxide |
vol-% |
40 |
35 |
0.9 |
| Carbon dioxide, range |
vol-% |
15-50 |
30-40 |
- |
| Nitrogen |
vol-% |
15 |
0.2 |
0.3 |
| Nitrogen, range |
vol-% |
5-40 |
- |
- |
| Oxygen |
vol-% |
1 |
0 |
0 |
| Oxygen, range |
vol-% |
0-5 |
- |
- |
| Hydrogen sulphide |
ppm |
< 100 |
< 500 |
3 |
| Hydrogen sulphide, range |
ppm |
0-100 |
0-4000 |
1-8 |
| Ammonia |
ppm |
5 |
100 |
0 |
| Total chlorine as Cl- |
mg/N |
20-200 |
0-5 |
|