From: Efficient and ultra-clean use of biogas in the fuel cell - the DFC experience
Composition | Natural gas | Biogases | |||
---|---|---|---|---|---|
Wastewater | Food waste | Animal waste | Landfill | ||
Methane (vol.%) | 80 to 100 | Approximately 50 to 65 | Approximately 50 to 70 | 45 to 60 | 40 to 55 |
Carbon dioxide (vol.%) | 0 to 3 | 35 to 45 | 25 to 45 | 35 to 50 | 35 to 50 |
Nitrogen (vol.%) | 0 to 3 | 0 to 5 | 0 to 5 | 0 to 5 | 0 to 20 |
Oxygen (vol.%) | 0 to 0.2 | 0 to 1 | 0 to 1 | 0 to 1 | 0.5 to 4 |
Higher hydrocarbons (vol.%) | 0 to 15 | Negligible | Negligible | 0 to 1 | 0 to 1 |
Impurities (ppm) | |||||
H2S | 0 to 0.1 | 0 to 3,000 | 0 to 10,000 | 0 to 3,000 | 0 to 2,000 |
Non-H2S sulfur | 0 to 10 | 0 to 1 | 0 to 1,000 | 0 to 30 | 0 to 50 |
Halogens | <0.1 | <0.2 | <0.2 | <0.2 | 0 to 100 |