Question

Which promoter is used in Haber’s process?

Answer 1

We need to remember that the Haber’s process is used for the preparation of ammonia. The ammonia is a chemical compound having the formula, $N{H_3}$ . And it is a stable binary hydride. The ammonia does not have any colour with a pungent smell. Most of the ammonia is used as a fertilizer for agricultural purposes. It is also used for the purification of water as a refrigerant gas and for the production of pesticides, dyes, textiles etc.

Complete answer:
The Haber process is also known as Haber – Bosch process which is used for the manufacture of ammonia. This is an artificial nitrogen fixation process. The promoter used in Haber's process is molybdenum. The promoter is a matter which is used to improve the performance of a chemical reaction and it is a solid catalyst. Therefore, the molybdenum is used as a promoter in the Haber process.
During the Haber process, the atmospheric nitrogen is transformed into ammonia by the reaction of hydrogen with nitrogen in the presence of a metal catalyst and high pressure and temperature. Here the mixture of gases goes through the four beds of the catalyst. Each pass will carry cooling to maintain the equilibrium constant.
${N_{2\left( g \right)}} + 3{H_{2\left( g \right)}}\overset {Metalcatalyst} \leftrightarrows 2N{H_3}_{\left( g \right)}$

Note:
The Haber process is used for the manufacturing of ammonia. And the promoter used in Haber's process is molybdenum. This promoter will improve the rate and performance of chemical reactions. Here, one mole of nitrogen is reacted with three moles of hydrogen in the presence of a catalyst and there is a formation of two moles of ammonia.