Question

In heterogenous catalysis of a gaseous reactants over solid catalyst

Answer 1

Heterogeneous catalysis:

• Heterogeneous catalysis is the reaction where the catalyst is in a different phase from the reactants and products.
• Hence, in a reaction of heterogeneous catalysis of a gaseous reactant over a solid catalyst, the reactant in the gaseous phase gets absorbed on the solid surface of the catalyst and proceeds to the reaction.
• Therefore solid phase heterogeneous catalysis involves molecular adsorption on the catalyst surface.
• Heterogeneous catalysis is used in the industrial production of various chemicals.
• Haber's process is one of the most common examples of heterogeneous catalysis involving the production of ammonia from nitrogen and hydrogen.

$\underset{\mathrm{Nitrogen}}{{\mathrm{N}}_2\left(\mathrm{g}\right)}+\underset{\mathrm{Hydrogen}}{3{\mathrm{H}}_2\left(\mathrm{g}\right)}\stackrel{\mathrm{Fe}\left(\mathrm{s}\right)}{\to }\underset{\mathrm{Ammonia}}{2{\mathrm{NH}}_3\left(\mathrm{g}\right)}$