"A spherical porous catalyst particle of radius R is subjected to reactant A which reacts to form B by a zero order surface reaction A → B. Film mass transfer resistance is negligible and pore diffusion of A is rate controlling. The effectiveness factor of the catalyst is reported as 7/8. Which of the following statement is true?A. Inner catalyst core of radius R/8 does not participate in reaction."

Chemical Reaction Engineering
"A spherical porous catalyst particle of radius R is subjected to reactant A which reacts to form B by a zero order surface reaction A → B. Film mass transfer resistance is negligible and pore diffusion of A is rate controlling. The effectiveness factor of the catalyst is reported as 7/8. Which of the following statement is true?A. Inner catalyst core of radius R/8 does not participate in reaction."

Inner catalyst core of radius 7R/8 does not participate in reaction

Ffectiveness factor for a zero order reaction can not be 7/8 as it must always be 1

Inner catalyst core of radius R/2 does not participate in reaction

Inner catalyst core of radius R/8 does not participate in reaction

Inner catalyst core of radius 7R/8 does not participate in reaction

Ffectiveness factor for a zero order reaction can not be 7/8 as it must always be 1

Inner catalyst core of radius R/2 does not participate in reaction

Inner catalyst core of radius R/8 does not participate in reaction

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Chemical Reaction Engineering
A stirred tank reactor compared to tubular-flow reactor provides

Higher overall selectivity for a first order consecutive reaction

More uniform operating conditions

All of these

Permits operation at the optimum temperature for a long reaction time

Higher overall selectivity for a first order consecutive reaction

More uniform operating conditions

All of these

Permits operation at the optimum temperature for a long reaction time

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Chemical Reaction Engineering
Most important characteristics of gas-liquid reactors are the

Specific inter-facial area

Liquid hold-up

Both A and B

None of these

Specific inter-facial area

Liquid hold-up

Both A and B

None of these

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Chemical Reaction Engineering
In a zero order reaction, reactants concentration does not change with time and the

Reaction rate is trebled when the initial concentration is trebled

Time for half change is half the time taken for completion of the reaction

Time for half change is independent of the initial concentration

Time for completion of the reaction is independent of the initial concentration

Reaction rate is trebled when the initial concentration is trebled

Time for half change is half the time taken for completion of the reaction

Time for half change is independent of the initial concentration

Time for completion of the reaction is independent of the initial concentration

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Chemical Reaction Engineering
An isothermal aqueous phase reversible reaction, P ⇋ R, is to be carried out in a mixed flow reactor. The reaction rate in k.mole/m³ .h is given by, r = 0.5CP - 0.125CR. A stream containing only P enters the

1.60

2.67

1.33

0.80

1.60

2.67

1.33

0.80

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Chemical Reaction Engineering
Which of the following is not a unit of reaction rate?

None of these

Moles formed/volume of reactor) (time)

Moles for med/(surface of catalyst) (time)

Mole formed/volume of catalyst) (time)

None of these

Moles formed/volume of reactor) (time)

Moles for med/(surface of catalyst) (time)

Mole formed/volume of catalyst) (time)

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Chemical Reaction Engineering

Chemical Reaction Engineering A stirred tank reactor compared to tubular-flow reactor provides

Chemical Reaction Engineering Most important characteristics of gas-liquid reactors are the

Chemical Reaction Engineering In a zero order reaction, reactants concentration does not change with time and the

Chemical Reaction Engineering An isothermal aqueous phase reversible reaction, P ⇋ R, is to be carried out in a mixed flow reactor. The reaction rate in k.mole/m³ .h is given by, r = 0.5CP - 0.125CR. A stream containing only P enters the

Chemical Reaction Engineering Which of the following is not a unit of reaction rate?

Chemical Reaction Engineering
A stirred tank reactor compared to tubular-flow reactor provides

Chemical Reaction Engineering
Most important characteristics of gas-liquid reactors are the

Chemical Reaction Engineering
In a zero order reaction, reactants concentration does not change with time and the

Chemical Reaction Engineering
An isothermal aqueous phase reversible reaction, P ⇋ R, is to be carried out in a mixed flow reactor. The reaction rate in k.mole/m³ .h is given by, r = 0.5CP - 0.125CR. A stream containing only P enters the

Chemical Reaction Engineering
Which of the following is not a unit of reaction rate?