BASIC DATA ON BIOGAS - Energikontor Sydost
BASIC DATA ON BIOGAS - Energikontor Sydost
BASIC DATA ON BIOGAS - Energikontor Sydost
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Swedish Gas Centre: Basic Data on BiogasMethaneMethane is the simplest alkane and consistsof one carbon atom and four hydrogen atomsand is probably the most abundant organicmolecule on earth.Property Unit ValueDensity, gas kg/m 3 0.72Relative density 0.56Density, liquide kg/m 3 423Upper calorific value kWh/Nm 3 11.0Lower calorific value kWh/Nm 3 9.97Wobbe index, upper kWh/Nm 3 14.8Wobbe index , lower kWh/Nm 3 13.3Flammable range % 4.4 – 16.5Boiling point °C -161.5Source: Encycopedie des Gaz, L’air LiquideSafetyThere exists several safety aspects that need to be considered duringproduction and handling of biogas. It is very important to be aware of therisks and to minimise these. The most common risks are:• Flammability• Poisoning (mainly H 2 S)• Suffocation• Risks caused by high pressures• Thermal injuriesAs the density of upgraded biogas is lower than air, any gas leaking will riseupward. In addition, upgraded biogas has a higher temperature of ignitionthan both petrol and diesel. This means in turn that the risk of fire orexplosion in traffic accidents is smaller for upgraded biogas than for petrolor diesel.10