Effectiveness factor (E) of a catalyst pellet is defined as, E = (actual rate within pore of catalyst/rate if notsnowed by pore diffusion) Effectiveness factor for a first order reaction is given by (where, T = Thiele modulus)

Chemical Reaction Engineering
Effectiveness factor (E) of a catalyst pellet is defined as, E = (actual rate within pore of catalyst/rate if notsnowed by pore diffusion) Effectiveness factor for a first order reaction is given by (where, T = Thiele modulus)

Tan T/T

Tan hT/T

None of these

Tan hT/tan T

Tan T/T

Tan hT/T

None of these

Tan hT/tan T

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Chemical Reaction Engineering
The rate expression for a heterogenous catalytic reaction is given by, - rA = K.KA PA(1 + KA.PA + Kr.PR), where K is surface reaction rate constant and KA and KR are absorption equilibrium constants of A and R respectively. If KR PR >> (1 + KA PA), the apparent activation energy EA is equal to (given E is the activation energy for the reaction and ΔHR and ΔHA are the activation energies of adsorption of R and A)

E + ΔHA - ΔHR

ΔHA + ΔHR

E + ΔHA

E

E + ΔHA - ΔHR

ΔHA + ΔHR

E + ΔHA

E

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Chemical Reaction Engineering
The half life period of a first order reaction is

Half the specific rate constant

Proportional to the initial concentration of reactants

Always the same irrespective of the reaction

Dependent on initial concentration of the reactants

Half the specific rate constant

Proportional to the initial concentration of reactants

Always the same irrespective of the reaction

Dependent on initial concentration of the reactants

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Chemical Reaction Engineering
An exothermic reaction takes place in an adiabatic reactor. The product temperature __________ reactor feed temperature.

Is always greater than

Is always equal to

Is always less than

May be greater or less than

Is always greater than

Is always equal to

Is always less than

May be greater or less than

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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

10°C

20°C

100°C

5°C

10°C

20°C

100°C

5°C

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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

K cal/°K

K cal

K cal. °K

°K

K cal/°K

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Chemical Reaction Engineering

Chemical Reaction Engineering Effectiveness factor (E) of a catalyst pellet is defined as, E = (actual rate within pore of catalyst/rate if notsnowed by pore diffusion) Effectiveness factor for a first order reaction is given by (where, T = Thiele modulus)

Chemical Reaction Engineering The half life period of a first order reaction is

Chemical Reaction Engineering An exothermic reaction takes place in an adiabatic reactor. The product temperature __________ reactor feed temperature.

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
Effectiveness factor (E) of a catalyst pellet is defined as, E = (actual rate within pore of catalyst/rate if notsnowed by pore diffusion) Effectiveness factor for a first order reaction is given by (where, T = Thiele modulus)

Chemical Reaction Engineering
The half life period of a first order reaction is

Chemical Reaction Engineering
An exothermic reaction takes place in an adiabatic reactor. The product temperature __________ reactor feed temperature.

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