what is difference between catalyst and promoter?

Answer 1

In chemistry, a catalyst (Greek: καταλύτης, catalytēs) is a substance that decreases the activation energy of a chemical reaction (see also catalysis) without itself being changed at the end of the chemical reaction. Catalysts participate in reactions but are neither reactants nor products of the reaction they catalyse (a strange 'exception' is the process of autocatalysis). They work by providing an alternative pathway for the reaction to occur, thus reducing the activation energy and increasing the reaction rate. More generally, one may at times call anything that accelerates a reaction, without itself being consumed or changed, a "catalyst" (for example, a "catalyst for political change").

A promoter is an accelerator of catalysis, but not a catalyst by itself. An inhibitor inhibits the working of a catalyst.

Answer 2

catalyst is agent which speeds up a reaction without any chemical change
whereas a promoter is used to promote a catalyst or rather makes the catalyst to speed up a reaction

Answer 3

CATALYST : A substance, usually used in small amounts relative to the reactants, that modifies and increases the rate of a reaction without being consumed in the process.

PROMOTER : A substance that increases the activity of a catalyst.

Answer 4

a catalyst is something which alters the speed of a reaction whereas a promoter is one which acts as a catalyst to a catalyst

Answer 5

HI

A catalyst is a substance which increases the weight of the substance without any chemical change.

A promoter is a substance which increases the speed of catalyst in the substance.

from
schilka

Answer 6

Catalyst inhibits the rate of reaction while
Promoter is used to start the catalyst.

Answer 7

catalysts speed up the rate of reaction or rather alter the speed of the reaction
whereas a promoter helps the catalyst or it helps the catalyst to speed up the reaction

Answer 8

hello ,i am damn a sure about a catalyst and promoter. Catalyst is a substance that increases\accelerates the rate of a reaction.Promoter is used in genetics, it is a DNA sequence that enables a gene to be transcribed.

Answer 9

Catalys is something that enhances / fastens the rate f reaction without actually taking a part in the reaction.
The promoter on th other hand is some thing that activates the performance of catalyst.

Answer 10

CATALYST:-A substance that changes the rate of a chemical reaction without itself undergoing permanent change in composition or becoming a part of the molecular structure of the product. A substance that markedly speeds up the cure of a compound when added in minor quantity as compared to the amounts of primary reactants.

PROMOTER:-This is an agent which increases tumour production by another substance when applied to susceptible organisms after their exposure to the first substance.