Which of the following is not a dimension-less group used in catalysis ? (where, D = dispersion co-efficient, cm² /sec.D1 = diffusion co-efficient; cm²/sec L = length of the reactor, cm t = time, sec, v = volumetric flow rate, cm³/sec . V = volume, cm³.)

Chemical Reaction Engineering
Which of the following is not a dimension-less group used in catalysis ? (where, D = dispersion co-efficient, cm² /sec.D1 = diffusion co-efficient; cm²/sec L = length of the reactor, cm t = time, sec, v = volumetric flow rate, cm³/sec . V = volume, cm³.)

Reduced time (vt/V)

Reactor dispersion number (D/vL)

None of these

Thiele modulus (L√(k/D1)

Reduced time (vt/V)

Reactor dispersion number (D/vL)

None of these

Thiele modulus (L√(k/D1)

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Chemical Reaction Engineering
An irreversible aqueous phase reaction, A + B → P, is carried out in an adiabatic mixed flow reactor. A feed containing 4kmole/m³ of each A and B enters the reactor at 8m³ /hr. If the temperature of the exit stream is never to exceed 390 K, what is the maximum inlet feed temperature allowed?(Data: Heat of reaction = - 50 kJ/mole, Density of the reacting mixture = 1000kg/m³, Specific heat of reacting mixture = 2kJ/kg.K)The above data can be assumed to be independent of temperature and composition.

190

290

490

390

190

290

490

390

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Chemical Reaction Engineering
At a given value of E/R (ratio of activation energy and gas constant), the ratio of the rate constants at 500°K and 400°K is 2, if Arrhenious law is used. What will be this ratio, if transition state theory is used with the same value of E/R?

2

1.6

2.5

2.24

2

1.6

2.5

2.24

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Chemical Reaction Engineering
Rate of a chemical reaction is not influenced by the

Temperature

Catalyst

Reactants concentration

Number of molecules of reactants taking part in a reaction

Temperature

Catalyst

Reactants concentration

Number of molecules of reactants taking part in a reaction

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Chemical Reaction Engineering
The rate of forward reaction, at chemical equilibrium is____the rate of backward reaction.

Equal to

Less than

More than

Either B or C

Equal to

Less than

More than

Either B or C

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Chemical Reaction Engineering
A batch adiabatic reactor at an initial temperature of 373°K is being used for the reaction, A → B. Assume the heat of reaction is - 1kJ/mole at 373°K and heat capacity of both A and B to be constant and equal to 50J/mole.K. The temperature rise after a conversion of 0.5 will be

100°C

5°C

20°C

10°C

100°C

5°C

20°C

10°C

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Chemical Reaction Engineering

Chemical Reaction Engineering Which of the following is not a dimension-less group used in catalysis ? (where, D = dispersion co-efficient, cm² /sec.D1 = diffusion co-efficient; cm²/sec L = length of the reactor, cm t = time, sec, v = volumetric flow rate, cm³/sec . V = volume, cm³.)

Chemical Reaction Engineering At a given value of E/R (ratio of activation energy and gas constant), the ratio of the rate constants at 500°K and 400°K is 2, if Arrhenious law is used. What will be this ratio, if transition state theory is used with the same value of E/R?

Chemical Reaction Engineering Rate of a chemical reaction is not influenced by the

Chemical Reaction Engineering The rate of forward reaction, at chemical equilibrium is____the rate of backward reaction.

Chemical Reaction Engineering
Which of the following is not a dimension-less group used in catalysis ? (where, D = dispersion co-efficient, cm² /sec.D1 = diffusion co-efficient; cm²/sec L = length of the reactor, cm t = time, sec, v = volumetric flow rate, cm³/sec . V = volume, cm³.)

Chemical Reaction Engineering
At a given value of E/R (ratio of activation energy and gas constant), the ratio of the rate constants at 500°K and 400°K is 2, if Arrhenious law is used. What will be this ratio, if transition state theory is used with the same value of E/R?

Chemical Reaction Engineering
Rate of a chemical reaction is not influenced by the

Chemical Reaction Engineering
The rate of forward reaction, at chemical equilibrium is____the rate of backward reaction.