STUPIDSID
1(a)
What is Optimum Temperature propagation? Explain with respect to different types of reactors
10 M
1(b)
Differentiate Elementary vs Non elementary Reaction?
3 M
1(c)
Write down the performance equation for recycle reactor?
2 M
1(d)
The activation energy of a bio molecular reaction is about 9150 cal/mol. How much faster is this reaction at 500K than at 400K
5 M
2(a)
The reaction between CO and NO2 at low temperature proceeds with a rate
-rO2=k*[N O2]2 Suggest mechanism.
-rO2=k*[N O2]2 Suggest mechanism.
12 M
2(b)
In case of a first reaction, show that the times required for 75% conversion is double the time required for 50% conversion in a batch reactor
8 M
3(a)
Calculate the first order rate constant for the disappearance of A as per the gas phase reaction A →1.6 R if the volume of reaction mixture, starting with pure A, increases by 50% in 4 minutes. The total pressure of the system remains constant at 1.2 atm and the temperature is 25 deg C
8 M
3(b)
The initial rate of the reaction 2A+2B →C+D is determined for different initial conditions, with the results listed in the following table:
Find the rate law and rate constant for this reaction.
| Run | [A]0M | [B]0M | Initial rate, M/s |
| 1 | 0.185 | 0.133 | 3.35×10-4 |
| 2 | 0.185 | 0.266 | 1.35×10-3 |
| 3 | 0.370 | 0.133 | 6.75×10-4 |
| 4 | 0.370 | 0.266 | 2.70×10-3 |
Find the rate law and rate constant for this reaction.
12 M
4
From steady state kinetic runs in a mixed flow reactor, we obtain the following data on the reaction A R.
Find the space time needed to treat a feed of CAD=100 mol/m3 to 80% conversion 1) in a plug flow reactor 2) in a mixed flow reactor.
Find the space time needed to treat a feed of CAD=100 mol/m3 to 80% conversion 1) in a plug flow reactor 2) in a mixed flow reactor.
| ? sec | CAO mol/m3 | CA mol/m3 |
| 60 | 50 | 20 |
| 35 | 100 | 40 |
| 11 | 100 | 60 |
| 20 | 200 | 80 |
| 11 | 200 | 100 |
20 M
5
Consider the parallel decomposition of A of different orders,
A⇒R A⇒S A⇒T
where rR=1, rS=2 CA, rT=CA2. R is the desired product and S & T are desired product, CAO=2 mol/m3, Determine the maximum concentration of desired product obtainable in mixed and plug flow reactor
A⇒R A⇒S A⇒T
where rR=1, rS=2 CA, rT=CA2. R is the desired product and S & T are desired product, CAO=2 mol/m3, Determine the maximum concentration of desired product obtainable in mixed and plug flow reactor
20 M
6
A first order liquid phase reaction is carried out in an ideal CSTR. The concentration of the reactant in the feed is 3 Kmol/m3 and the volumetric flow rate is 60 × 10-6 m3/sec. The density and specific heat of the reaction mixture are constant at 1000 kg/m3 and 4.19 KJ/kg.K respectively. The reactor volume is 18 × 10-3m3. There is no product in the feed stream and reactor operates adiabatically. The heat and rate of reaction are
Hr =-2.09 × 108 J/kmol, -rA=4.48 × 106 exp(-62800/RT) . CA kmol/m3sec
If the feed stream is 25°C, what are the steady state conversion and temperatures in the product stream ? Suggest with reasoning , the optimum temperature to achieve high conversion.
Hr =-2.09 × 108 J/kmol, -rA=4.48 × 106 exp(-62800/RT) . CA kmol/m3sec
If the feed stream is 25°C, what are the steady state conversion and temperatures in the product stream ? Suggest with reasoning , the optimum temperature to achieve high conversion.
20 M
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