Mechanical Engineering - Thermodynamics - Discussion

Water gas, colorless poisonous gas that burns with an intensely hot, bluish (nearly colorless) flame. The gas is a mixture of carbon monoxide and hydrogen with very small amounts of other gases, e.g. , carbon dioxide, and is almost entirely combustible as a result. Water gas is so named because of the use of water (steam) in its preparation. This process involves treating white-hot hard coal or coke with a blast of steam; carbon monoxide and hydrogen are formed. The gas is manufactured in vast quantities for commercial use. It is of much importance in the preparation of hydrogen and as a fuel in the making of steel and in other industrial processes.

The gas is manufactured in vast quantities for commercial use. It is of much importance in the preparation of hydrogen and as a fuel in the making of steel and in other industrial processes.

Water gas is a synthesis gas, containing carbon monoxide and hydrogen. It is a useful product but requires careful handling because of the risk of carbon monoxide poisoning. The gas is made by passing steam over a red-hot carbon fuel such as coke:

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.

The water only produce following conditions. The gas is made by passing steam over a red-hot carbon fuel such as coke.

Water gas is produced by passing steam over red hot carbon fuel like coke. It is the combination of carbon monoxide and hydrogen. Approximately about 6 liters of water is required to produce 5 liters of water gas.

Carbon monoxide and hydrogen combined to form the water gas.

Water gas is obtained by passing steam over red hot carbon.

H2O + C = CO + H2.

What is actual temperature required?

Water gas is nothing but reaction between H2O and carbon at 147 kJ.

Dear friends.

The Water Gas is made by passing steam over a coke, containing carbon monoxide and hydrogen, a highly flammable and poisonous gas in industry it is used in production of steel.