Importance of Biochemistry

Hetrogenious catalysis ?

What does catalysis mean?


What does catalysis mean?

Catalysis :

The term “catalysis” refers to a process that aims to modify the chemical kinetics by lowering the energy barrier to be crossed. The goal of catalysis is to increase the rate at which a chemical reaction occurs or sometimes to favor one reaction over another.

Types of catalysis :

Homogeneous catalysis, heterogeneous catalysis and enzymatic catalysis

Homogeneous catalysis :

Catalysis is described as “homogeneous” when the  reactants and the catalyst are in the same phase. This is often the case in organic chemistry , with reagents in solution.

Heterogeneous catalysis :

In heterogeneous catalysis, on the other hand, the reactants and the catalyst are in different phases. Generally, the catalyst is in solid form and the reagents in gaseous or liquid form .

Enzymatic catalysis :

So-called enzymatic catalysis is a kind of link between the two. It can be considered homogeneous at the macroscopic level but, at the molecular level, the catalysis reactions are on the surface of the enzymes , as in the case of heterogeneous catalysis.

Industrial catalysis

Many industrial processes become more cost effective through catalytic processes. Catalysis allows for better yields, fewer steps in a process, and saves time and energy .

In the field of chemical synthesis , that of ammonia (NH 3 ), made from hydrogen (H 2 ) and nitrogen (N 2 ), is a good example. This reaction benefits from iron catalysis . Catalysis is also used for petroleum refining or the reduction of nitrogen oxides in catalytic converters .

Catalytic Reactions: Catalysis in Biochemistry

The majority of biological reactions are catalytic reactions. Catalysis is, in this case, carried out by enzymes that accelerate biochemical processes such as digestive metabolism , reproduction, transcription of genetic information , etc.

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