ASSIGNMENT TOPIC:
INTRODUCTION TO HETEROGENEOUS
CATALYSIS
SUBMITTED TO :
DR .NAILA ZUBAIR
SUBMITTED FROM :
PALWASHA SABATAIN
SUBJECT :
SURFACE CHEMISTRY
1
, HETEROGENEOUS CATALYSIS
Table of contents .
1. Introduction to catalysis
2. Types of catalysis
3 .Adsorption theory of heterogeneous catalysis
4. Mechanism of heterogeneous catalysis
5 .Specific examples
6 .Importanance
HETEROGENEOUS CATALYSIS :
A catalyst is a substance that may be ions, salt, metal, or inorganic compound, whatever that influences
the rate of a chemical reaction, but itself remains unchanged chemically at the end of the chemical
reaction.
CRITERIA FOR CATALYSIS :
The criteria or characteristics of catalysis/catalyst are listed below:
A small amount of catalyst is enough to catalyse the rate of reaction.
The catalyst remains unchanged in amount and composition at the end of a chemical reaction.
A catalyst does not initiate a chemical reaction.
A catalyst doest not affect equilibrium and catalyst does not initiate a chemical reaction.
A catalyst doest not affect equilibrium condition.
The action of catalyst is universal and specific.
The activity of catalyst is enhanced by the presence of a substance called promoter.
A catalyst has an optimum temperature at which the action of the catalyst is maximum.
2
INTRODUCTION TO HETEROGENEOUS
CATALYSIS
SUBMITTED TO :
DR .NAILA ZUBAIR
SUBMITTED FROM :
PALWASHA SABATAIN
SUBJECT :
SURFACE CHEMISTRY
1
, HETEROGENEOUS CATALYSIS
Table of contents .
1. Introduction to catalysis
2. Types of catalysis
3 .Adsorption theory of heterogeneous catalysis
4. Mechanism of heterogeneous catalysis
5 .Specific examples
6 .Importanance
HETEROGENEOUS CATALYSIS :
A catalyst is a substance that may be ions, salt, metal, or inorganic compound, whatever that influences
the rate of a chemical reaction, but itself remains unchanged chemically at the end of the chemical
reaction.
CRITERIA FOR CATALYSIS :
The criteria or characteristics of catalysis/catalyst are listed below:
A small amount of catalyst is enough to catalyse the rate of reaction.
The catalyst remains unchanged in amount and composition at the end of a chemical reaction.
A catalyst does not initiate a chemical reaction.
A catalyst doest not affect equilibrium and catalyst does not initiate a chemical reaction.
A catalyst doest not affect equilibrium condition.
The action of catalyst is universal and specific.
The activity of catalyst is enhanced by the presence of a substance called promoter.
A catalyst has an optimum temperature at which the action of the catalyst is maximum.
2
