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
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 absorbed B

Surface reaction between absorbed A and B in the gas phase

Absorption of A

Surface reaction between A in the gas phase and absorbed B

Surface reaction between absorbed A and absorbed B

Surface reaction between absorbed A and B in the gas phase

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Chemical Reaction Engineering
For all positive reaction orders for a particular duty,

Density variation during reaction affects design

Mixed reactor is always larger than the plug-flow reactor

Reactor size is independent of the type of flow

Ratio of the volume of the mixed reactor to that of the plug-flow reactor decreases with order

Density variation during reaction affects design

Mixed reactor is always larger than the plug-flow reactor

Reactor size is independent of the type of flow

Ratio of the volume of the mixed reactor to that of the plug-flow reactor decreases with order

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Chemical Reaction Engineering
From Arhenius law, a plot of loge K versus 1/T gives a straight line with a slope of (-E/R). The unit of E/R is

K cal

K cal. °K

K cal/°K

°K

K cal

K cal. °K

K cal/°K

°K

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Chemical Reaction Engineering
The effectiveness factor for large value of Thiele modulus (L√(K/D1)) of a solid catalysed first order reaction is equal to (where, L = length of the reactor, cm, D1 = diffusion co-efficient, cm²/second)

L√(K/D1)

1

1/(L√(K/D1))

∞

L√(K/D1)

1

1/(L√(K/D1))

∞

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Chemical Reaction Engineering
A batch reactor is characterised by

Constant residence time

Very low conversion

Variation in reactor volume

Variation in extent of reaction and properties of the reaction mixture with time

Constant residence time

Very low conversion

Variation in reactor volume

Variation in extent of reaction and properties of the reaction mixture with time

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Chemical Reaction Engineering
For a heterogenous catalytic reaction, A + B → C, with equimole feed of A and B, the initial rate - rA0 is invariant with total pressure. The rate controlling step is

Desorption of C

Surface reaction between absorbed A and absorbed B

Surface Kc/(1 + TS) reaction between absorbed A and B in the gas phase

Surface reaction between A in the gas phase and absorbed B

Desorption of C

Surface reaction between absorbed A and absorbed B

Surface Kc/(1 + TS) reaction between absorbed A and B in the gas phase

Surface reaction between A in the gas phase and absorbed B

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Chemical Reaction Engineering

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 For all positive reaction orders for a particular duty,

Chemical Reaction Engineering From Arhenius law, a plot of loge K versus 1/T gives a straight line with a slope of (-E/R). The unit of E/R is

Chemical Reaction Engineering The effectiveness factor for large value of Thiele modulus (L√(K/D1)) of a solid catalysed first order reaction is equal to (where, L = length of the reactor, cm, D1 = diffusion co-efficient, cm²/second)

Chemical Reaction Engineering A batch reactor is characterised by

Chemical Reaction Engineering For a heterogenous catalytic reaction, A + B → C, with equimole feed of A and B, the initial rate - rA0 is invariant with total pressure. The rate controlling step is

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
For all positive reaction orders for a particular duty,

Chemical Reaction Engineering
From Arhenius law, a plot of loge K versus 1/T gives a straight line with a slope of (-E/R). The unit of E/R is

Chemical Reaction Engineering
The effectiveness factor for large value of Thiele modulus (L√(K/D1)) of a solid catalysed first order reaction is equal to (where, L = length of the reactor, cm, D1 = diffusion co-efficient, cm²/second)

Chemical Reaction Engineering
A batch reactor is characterised by

Chemical Reaction Engineering
For a heterogenous catalytic reaction, A + B → C, with equimole feed of A and B, the initial rate - rA0 is invariant with total pressure. The rate controlling step is