The reaction A → B is conducted in an adiabatic plug flow reactor (PFR). Pure A at a concentration of 2 kmol/m³ is fed to the reactor at the rate of 0.01 m³ /s and at a temperature of 500 K. If the exit conversion is 20%, then the exit temperature (in k)is (Data: Heat of reaction at 298 K = - 50000 kJ/ kmole of A reacted Heat capacities CPA = CPB = 100kJ/kmole. K (may be assumed to be independent of temperature))

Chemical Reaction Engineering
The reaction A → B is conducted in an adiabatic plug flow reactor (PFR). Pure A at a concentration of 2 kmol/m³ is fed to the reactor at the rate of 0.01 m³ /s and at a temperature of 500 K. If the exit conversion is 20%, then the exit temperature (in k)is (Data: Heat of reaction at 298 K = - 50000 kJ/ kmole of A reacted Heat capacities CPA = CPB = 100kJ/kmole. K (may be assumed to be independent of temperature))

500

600

400

1000

500

600

400

1000

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Chemical Reaction Engineering
The half life period of a first order reaction is given by (where, K = rate constant. )

6.93 K

1.5 K

2.5 K

0.693/K

6.93 K

1.5 K

2.5 K

0.693/K

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Chemical Reaction Engineering
To maximise the formation of R in the simultaneous reactionA + B → R , rR = 2CA0.5.CB2 A + B → S , rS = 1.5 CA . CB We should have

High CA, low CB

Low CA, low CB

High CA, high CB

Low CA, high CB

High CA, low CB

Low CA, low CB

High CA, high CB

Low CA, high CB

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Chemical Reaction Engineering
The exit age distribution curve E(t) for an ideal CSTR with the average residence time, τ, is given by

E-t/τ/T

1 - e-t/τ

1 - (e-t/τ/T)

E-t/τ

E-t/τ/T

1 - e-t/τ

1 - (e-t/τ/T)

E-t/τ

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Chemical Reaction Engineering
Batch process is preferred over continuous process, when the

Product yields and quality can not be achieved in continuous process, because of long residence time

Sales demand of product is not steady

Same equipment can not be used for several processes of the same nature

All of these

Product yields and quality can not be achieved in continuous process, because of long residence time

Sales demand of product is not steady

Same equipment can not be used for several processes of the same nature

All of these

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Chemical Reaction Engineering
Enzymes (a protein) are catalysts found in organisms. Its efficiency of catalysing a reaction is due to its capacity to lower the activation energy of the reaction. The enzyme ptyalin used for food digestion is present in

Blood

Intestine

Gland

Saliva

Blood

Intestine

Gland

Saliva

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Chemical Reaction Engineering

Chemical Reaction Engineering The half life period of a first order reaction is given by (where, K = rate constant. )

Chemical Reaction Engineering To maximise the formation of R in the simultaneous reactionA + B → R , rR = 2CA0.5.CB2 A + B → S , rS = 1.5 CA . CB We should have

Chemical Reaction Engineering The exit age distribution curve E(t) for an ideal CSTR with the average residence time, τ, is given by

Chemical Reaction Engineering Batch process is preferred over continuous process, when the

Chemical Reaction Engineering Enzymes (a protein) are catalysts found in organisms. Its efficiency of catalysing a reaction is due to its capacity to lower the activation energy of the reaction. The enzyme ptyalin used for food digestion is present in

Chemical Reaction Engineering
The half life period of a first order reaction is given by (where, K = rate constant. )

Chemical Reaction Engineering
To maximise the formation of R in the simultaneous reactionA + B → R , rR = 2CA0.5.CB2 A + B → S , rS = 1.5 CA . CB We should have

Chemical Reaction Engineering
The exit age distribution curve E(t) for an ideal CSTR with the average residence time, τ, is given by

Chemical Reaction Engineering
Batch process is preferred over continuous process, when the

Chemical Reaction Engineering
Enzymes (a protein) are catalysts found in organisms. Its efficiency of catalysing a reaction is due to its capacity to lower the activation energy of the reaction. The enzyme ptyalin used for food digestion is present in