Hydrogen as fuel :
The heat of combustion of hydrogen is high and hence hydrogen is widely used as an industrial fuel.
Oxyhydrogen blow torch :
When hydrogen is burnt with pure oxygen in oxyhydrogen blow torch a high temperature flame is obtained. It is used for welding purposes and for melting platinum and quartz.
Water gas :
A mixture of obtained when steam is injected over a white-hot bed of coal or coke is known as water gas. The calorific value of gas is
Uses of Water Gas :
- Water gas s used to remove carbon dioxide from fuel cells.
- Reacted with producer gas to make fuel gas.
- It is used in the process of Fischer-Tropsch.
- It is Used to obtain pure hydrogen to synthesize ammonia.
Carburated water gas :
The calorific value of water gas is increased by adding gaseous hydrocarbons to it. This enriched mixture is called carburated water gas.
Semi water gas :
A mixture of air and steam in appropriate proportions is passed through red-hot carbon. The heat generated by the combustion of carbon maintains the temperature necessary for the formation of water gas – by the action of steam on carbon which is endothermic. The gaseous mixture thus obtained contains hydrogen (10 – 12%); Carbon monoxide (25 – 28%); (4 – 5%); nitrogen (50 – 55%) and methane (1 – 2%). It is used as fuel in the steel industry. It has a low calorific value.