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Engr. Muhammad Sajid

CHE - 327

Chemical Reaction Engineering I

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Chemical Reaction Engineering I

Reactor Raw

Material

Product

Chemical Reaction Engineering (CRE) is the field that studies the rates and mechanisms of chemical reactions and the design of the reactors in which they take place.

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A reaction is of zero order when the rate of reaction is independent of the concentration of materials

Zero-Order Reactions

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Overall Order of Irreversible Reactions from the Half-Life t1/2

Half-Life t1/2

Time needed for the concentration of reactants to drop to one-half the original value

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If

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Fractional Life Method tF

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IRREVERSIBLE REACTION IN SERIES

A R S

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k1 k2

AA

ACkr

dt

dC1

RAR

RCkCkr

dt

dC21

RS

SCkr

dt

dC2

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tkC

C

A

A1

0

ln

OR

)exp( 10 tkCCA A

)exp( 1012 tKCkCkdt

CAR

R

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RAR

RCkCkr

dt

dC21

ARR

CkCkdt

dC12

)( 112 tkeCkCkdt

dC AoR

R

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