# Single ideal reactors and batch reactor

(system) #1

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Single ideal reactors and batch reactor

## Problem #2 In the presence of a homogeneous catalyst of a given concentration aqueous reactant A converted to product at the following rates and CAo alone determined this rate. CA mol/lit 1 2 4 6 7 9 12 -r mol/lit.hr 0.06 0.1 0.25 1.0 2.0 1.0 0.5 a) Find the time needed to lower the concentration of A from CAo= 10 mol/lit to CAf= 2mol/lit in a batch reactor. What size of mixed flow reactor is needed for 60% conversion of a feed stream of 1000 mol/hr at CAo =8 mol/liter?

Problem 3
The thermal decomposition of nitrous oxide (N2O)in the gas phase at 1030 K is studied in a constant volume batch reactor at different initial pressures of N2O The half- life data so obtained are as follows:
Po .mmHg 52.5 139 290 360
T1/2,sec 860 470 225 212
Determine a rate equation that fits these data.

• Problem #4
Consider a gas- phase dehydrogenation reaction that occurs at a constant temperature of 1000K.
RCH2OH (g)—> RCHO (g) + H (g)
At this temperature, the reaction rate constant is equal to 0 04 lit/(mol mm)
If the reaction takes place in a constant pressure batch reactor, starting with 90% gaseous RCH2OH and 10% inerts at a pressure of 2 atm, find the time necessary to reach 20% conversion of RCH2OH.
What would be the conversion after 10 hours in a bomb reactor operating at the same temperature, starting with pure A feed at 5 atm ?

Problem#5
The elementary gas-phase reaction A+ B <–> R takes place at 120° C and 1 atm in a mixed flow reactor The feed consists of 20 mol%A, 20% B and the remainder inerts.
At 120°C, the rate constant for the forward reaction is 5.04 m and that of the reverse reaction is 2.16 hr The flow rate of the feed stream is 0.1 m3/hr.
Calculate the following:
a) Equilibrium conversion of B.
Volume of the CSTR necessary to convert 60% of A.
c) Space time necessary to achieve 60% conversion of A.

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