In a semi-batch reactor __________________?

Correct answer: B. Velocity of reaction can be controlled

  • A. Mixing takes place in axial direction only
  • B. Velocity of reaction can be controlled
  • C. Condition similar to plug flow reactor exists
  • D. Residence time is constant

Explanation

A semi-batch reactor permits controlled addition or removal of reactants during operation, so the reaction rate can be adjusted through the feed rate and composition. Its residence time is not generally constant, and it is not inherently a plug-flow reactor.

Written and checked by , MS Computer ScienceLast updated
Report an error

The more specific you are, the faster it gets fixed. A source beats an opinion.

Prefer email? support@testustad.com

Practise Chemical Reaction Engineering

395 free Chemical Reaction Engineering MCQs from Chemical Engineering, each with the correct answer and an explanation. Unlimited attempts, no account needed.

Exams that ask Chemical Engineering questions like this

Chemical Engineering is on this paper prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for it.

More Chemical Reaction Engineering questions

Pure ethanol vapor is fed to a reactor packed with alumina catalyst, at the rate of 100 kmole / hr. The reactor products comprise: ethylene: 95 kmole / hr, water vapour: 97.5 k mole / hr and diethyl ether: 2.5 kmole/hr. The reactions occuring can be represented by: C2H5OH → C2H4 + H2O 2C2H5OH → C2H5 - O - C2H5 + H2O The percent conversion of ethanol in the reactor is________________?

The most unsuitable reactor for carrying out reactions in which high reactant concentration favours high yields is________________________?

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 ____________?

A catalyst loses its activity due to__________________?

The dimensions of rate constant for reaction 3A → B are (l/gm mole)/min. Therefore the reaction order is______________________?

Second order consecutive irreversible reaction as shown in the bellow figure, were carried out in a constant volume isothermal batch reactor with different initial feed compositions. Reactor temperature was same in all the cases. In experiments where the ratio of concentration of B to that of A in the initial feed was less than 0.5, the concentration of B increased first, reached a maximum and then declined with time. However, for all experiments where this concentration ratio was 0.5 or above, concentration of B decreased monotonically with time right from the beginning. What is the ratio of the two rate constants (k1/k2) ?