Chemical Reaction Engineering (set 2) – Exam

The reactor volume of an ideal PFR is equivalent to a/an

A PFR with an infinite recycle ratio is equivalent to a/an

Which of the following is false regarding independent reactions?

Which of the following may exhibit steady-state multiplicity?

This is the is the slowest step of a chemical reaction that determines the speed at which the overall reaction proceeds.

Which of the following catalyst geometry has the highest effectiveness factor at low Thiele modulus for a first order rection?

This catalyst deactivation may be caused by attrition or erosion and subsequent loss as fines

Using a multi-tubular reactor, what catalyst is conventionally used to produce gaseous phosgene from carbon monoxide and chlorine gas?

Which of the following reactors is best suited to slow reactions with a limiting reaction rate?

This processspontaneously transformsa solid reagent into products due to the exothermic heat of combustion.

What is the most common use of a trickle bed reactor?

An irreversible gas-phase reaction is carried out in a batch reactor at 25°C. The reaction is: A + B → C with a rate of -r_A = 3.5E-5 C_AC_B in mol/m³-s. The reactor is filled with an equal amount of moles of A and B. The initial concentration of A is 50 mol/m³.

Calculate the conversion of A after 5000 s for a variable-volume batch reactor in which the pressure is held constant.

An irreversible gas-phase reaction is carried out in a batch reactor at 25°C. The reaction is: A + B → C with a rate of -r_A = 3.5E-5 C_AC_B in mol/m³-s. The reactor is filled with an equal amount of moles of A and B. The initial concentration of A is 50 mol/m³

If the reaction is changed to: A + B → 2C + D while other initial conditions and variables held constant, what is the conversion of A after 5000 s?

An irreversible liquid phase second order reaction, 2 A → B, with a rate constant of 0.04 M-1s-1, is carried out in a flow reactor. A 2.5-M solution of A enters at a volumetric flow rate of 5 L/s. It is desired to reach a conversion such that the exiting concentration of A is reduced to 0.25 M. What is the ratio of reactor volumes of CSTR to PFR to be use separately?

. One mole each of A and B produces together one mole each of D and U in separate parallel non-elementary reactions. The reaction order of A to produce D is greater than its reaction order to produce U while the reaction order of B to produce U is greater than its reaction order to produce D. If D is the desired product, which of the following is the best configuration of reactor to increase the selectivity?