Reaction for the synthesis of water gas n producer gas
Answers
Producer gas is fuel gas that is manufactured from material such as coal, as opposed to natural gas. A combustible mixture of nitrogen, carbon monoxide, and hydrogen, generated by passing air with steam over burning coke or coal in a furnace and used as fuel. Also called air gas.
2C + O2 + 3.73 N2 → 2CO+ 3.73 N2
2. Water Gas
Water gas is produced from synthesis gas, which is composed of carbon monoxide and hydrogen. Syngas is a useful product, but requires careful handling due to its flammability and the risk of carbon monoxide poisoning. The water-gas shift reaction can be used to reduce the carbon monoxide while producing additional hydrogen, resulting in water gas.
H2O + C → H2 + CO (ΔH = +131 kJ/mol)
The reaction is endothermic, so the fuel must be continually re-heated to keep the reaction going. In order to do this, an air stream, which alternates with the vapor stream, is introduced for the combustion of carbon to take place.
O2 + C → CO2 (ΔH = −393.5 kJ/mol)
Theoretically, to make 6 L of water gas, 5 L of air is required.
Or, alternatively, to prevent contamination with nitrogen, energy can be provided by using pure oxygen to burn carbon into carbon monoxide.
O2 + 2 C → 2 CO (ΔH = −221 kJ/mol)
In this case 1 L of oxygen will create 5.3 L of pure water gas.
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