Why does raising the methane percentage raise the energy value?
derived
Carbon dioxide, nitrogen and water vapour in biogas are inert and carry no combustion energy, so calorific value scales almost linearly with methane content. Upgrading from about 60% to over 90% methane concentrates the energy per cubic metre, which is what makes CBG saleable as a vehicle fuel rather than a boiler gas.
- derived
- Reasoned from sourced facts or engineering fundamentals, not quoted from one.
- Level
- Beginner — New to biogas. Plain language, no units assumed.
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