Question

Give the equation for preparation of producer gas and water gas.

Answer 1

Producer Gas

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.

3. Wood Gas

Wood gas is a syngas fuel which can be used as a fuel for furnaces, stoves and vehicles in place of gasoline, diesel or other fuels. During the production process biomass or other carbon-containing materials are gasified within the oxygen-limited environment of a wood gas generator to produce hydrogen and carbon monoxide.

Nitrogen N2: 50.9%

Carbon monoxide CO: 27.0%

Hydrogen H2: 14.0%

Carbon dioxide CO2: 4.5%

Methane CH4: 3.0%

Oxygen O2: 0.6%.

Thank you ☺

Answer 2

"Producer Gas

    Producer gas is fuel gas, which is manufactured from coal, the natural source. 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. This is also called as air gas.

 $2C + O_2 + N_2 \rightarrow 2CO+ N_2$

Water Gas

Water gas is also known as synthesis gas or syn gas, which is composed of carbon monoxide and hydrogen.

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.

$O_2 + C \rightarrow CO_2 (\Delta H = - 393.5 kJ/mol)$

Theoretically, to make 6 L of water gas, 5 L of air is required."