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
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

Intestine

Blood

Gland

Saliva

Intestine

Blood

Gland

Saliva

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Chemical Reaction Engineering
Sometimes, batch process is preferred over continuous process, when the product

Quality & yield can not be achieved in continuous processes, because of long residence time

Both A & B

Neither A nor B

Sales demand is fluctuating

Quality & yield can not be achieved in continuous processes, because of long residence time

Both A & B

Neither A nor B

Sales demand is fluctuating

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Chemical Reaction Engineering
BET apparatus is used to determine the

Pore size distribution

Specific surface of a porous catalyst

Pore diameter

Porosity of the catalyst bed

Pore size distribution

Specific surface of a porous catalyst

Pore diameter

Porosity of the catalyst bed

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Chemical Reaction Engineering
The rate of the heterogenous catalytic reaction A(g) + B(g) ? C(g) is given by -rA = k.KA.pA.PB/(1 + KA.PA + Kc.pc), where KA and Kc are the adsorption equilibrium constants. The rate controlling step for this reaction isA. absorption of A.

Absorption of A

Surface reaction between A in the gas phase and absorbed B

Surface reaction between absorbed A and B in the gas phase

Surface reaction between absorbed A and absorbed B

Absorption of A

Surface reaction between A in the gas phase and absorbed B

Surface reaction between absorbed A and B in the gas phase

Surface reaction between absorbed A and absorbed B

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Chemical Reaction Engineering
A first order gaseous phase reaction is catalysed by a non-porous solid. The kinetic rate constant and the external mass transfer co-efficients are k and kg respectively. The effective rate constant (keff) is given by

keff = (k+ kg)/2

keff = k + kg

1/keff = 1/k + 1/kg

keff = (kkg)1/2

keff = (k+ kg)/2

keff = k + kg

1/keff = 1/k + 1/kg

keff = (kkg)1/2

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Chemical Reaction Engineering
In Langmuir treatment of adsorption,

Extent of adsorption is more than one complete monomolecular layer on the surface

Whole surface of the catalyst does not have the same activity for adsorption and there is attraction between the adsorbed molecule

Whole surface of the catalyst is essentially uniform and the adsorbed molecule has no effect on the rate of adsorption per site

All the adsorption does not take place by the same mechanism

Extent of adsorption is more than one complete monomolecular layer on the surface

Whole surface of the catalyst does not have the same activity for adsorption and there is attraction between the adsorbed molecule

Whole surface of the catalyst is essentially uniform and the adsorbed molecule has no effect on the rate of adsorption per site

All the adsorption does not take place by the same mechanism

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Chemical Reaction Engineering

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 Sometimes, batch process is preferred over continuous process, when the product

Chemical Reaction Engineering BET apparatus is used to determine the

Chemical Reaction Engineering The rate of the heterogenous catalytic reaction A(g) + B(g) ? C(g) is given by -rA = k.KA.pA.PB/(1 + KA.PA + Kc.pc), where KA and Kc are the adsorption equilibrium constants. The rate controlling step for this reaction isA. absorption of A.

Chemical Reaction Engineering A first order gaseous phase reaction is catalysed by a non-porous solid. The kinetic rate constant and the external mass transfer co-efficients are k and kg respectively. The effective rate constant (keff) is given by

Chemical Reaction Engineering In Langmuir treatment of adsorption,

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
Sometimes, batch process is preferred over continuous process, when the product

Chemical Reaction Engineering
BET apparatus is used to determine the

Chemical Reaction Engineering
The rate of the heterogenous catalytic reaction A(g) + B(g) ? C(g) is given by -rA = k.KA.pA.PB/(1 + KA.PA + Kc.pc), where KA and Kc are the adsorption equilibrium constants. The rate controlling step for this reaction isA. absorption of A.

Chemical Reaction Engineering
A first order gaseous phase reaction is catalysed by a non-porous solid. The kinetic rate constant and the external mass transfer co-efficients are k and kg respectively. The effective rate constant (keff) is given by

Chemical Reaction Engineering
In Langmuir treatment of adsorption,