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Download GTU BE/B.Tech 2017 Winter 7th Sem Old 173601 Basics Of Catalysis Question Paper

Download GTU (Gujarat Technological University) BE/BTech (Bachelor of Engineering / Bachelor of Technology) 2017 Winter 7th Sem Old 173601 Basics Of Catalysis Previous Question Paper

This post was last modified on 20 February 2020

This download link is referred from the post: BHMS Last 10 Years 2011-2021 Previous Question Papers (Bachelor of Homeopathic Medicine and Surgery)



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Seat No.: Enrolment No.


GUJARAT TECHNOLOGICAL UNIVERSITY


BE - SEMESTER-VII(OLD) - EXAMINATION — WINTER 2017

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Subject Code: 173601 Date:10/11/2017


Subject Name: Basics of Catalysis


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Time:10.30 AM TO 01.00 PM Total Marks: 70


Instructions:



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  1. Attempt all questions.

  2. Make suitable assumptions wherever necessary.

  3. Figures to the right indicate full marks.
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  1. (a) What are the differential and integral analysis for kinetic data? Which one is more accurate? 07

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    (b) Classify the catalyst based on the reactions, explain any two in detail. 07

  2. (a) Derive an expression for concentration and time for a first order homogeneous catalytic reaction with respect to A by an integral method. The equation is in the form as:

    kq

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    A-R

    ky

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    A+C->R+C 07

    (b) Show that the decomposition of N2Os at 340 K is a first order reaction. Calculate the value of the rate constant. 07


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    Time (min) |0 1 2 3 4

    Cn2os,mol/l | 0.16 0.113 0.08 0.056 0.04

    OR

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    (b) How the deactivation of a catalyst takes place? How it is prevented and regenerated? 07

  3. (a) How the deactivation of a catalyst takes place by sintering? Derive the expression for the catalyst decay due to sintering. 07

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    (b) Reactant A is adsorbed on the surface of a catalyst and reacts with another component B in the gas phase. The products of the reaction are: C adsorbed on the surface and D in the gas phase. The product C is then desorbed from the surface. The proposed mechanism is

    Adsorption: A(g) +S « A.S

    Surface reaction: B(g) + A.S & C.S + D(g)

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    CcsP,
    75 = kg (PBCA.S - —C; D)
    S

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    Desorption: C.S & C(g) + S

    CyPe
    mp =kp (Cc.s - K_’>
    c

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    For surface reaction control, show that

    o — = CiksKa(PaPg — PcPp/Kp)

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    ATs 1+ P,K, + Pc /K

    OR

    How the deactivation of a catalyst takes place by poisoning? Derive the expression for 07

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    catalyst decay due to poisoning.

  4. (a) Toluene is adsorbed on the surface of a catalyst and reacts with hydrogen in the gas phase to produce benzene adsorbed on the surface and methane in gas phase. Benzene is then desorbed from the surface. The proposed mechanism is:

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    Adsorption: T(g) + S < A.S

    C

    Tap = ka (PTCV - fi)

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    Kr

    Surface reaction: H,(g) + T.S & B.S + M(g)

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    Cp.sPu
    T =k (PHZCT.S Tk )
    S

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    Desorption: B.S & B(g) + S

    CyPp
    rp =kp (CB.S - K_,B)
    When surface reaction controls show that

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    _ CeKsKi(Py,Pr — PPy /Kp)
    —r =71. =
    T 1+ PrKy + Pp/Kp 07

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    (b) Derive a performance equation for a catalytic batch reactor containing a batch of gas. 07

  5. (a) What is temperature time trajectory for a catalytic reaction? 07

    OR

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    Derive an expression of’concentration at the surface and at any time for the pore diffusion resistance combined with surface kinetics for a cylindrical particle. Consider the reaction is of first order. 07

    (b) Derive a performance equation for a catalytic plug flow reactor for a first order reaction. 07

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  7. (a) Write the expression for the different catalyst particle shapes effectiveness factor. Also make a graph between effectiveness factor and the Thiele modulus for different particle shapes. 07



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    (b) For the first order reaction the following rate concentration data is available 07

    Ca, mol/l 0.039 0.0575 0.075 0.092

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    -ra, mol A/hkg | 3.4 54 7.6 9.1

    cat


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    Without using a rate equation, find the size of packed bed needed to treat 2000 mol/hr of pure A at 117°C(Ca0=0.1 mol/l, ea=3) to 35% conversion at 3.2 atm.

    OR

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    A homogeneous gas reaction 07

    A- 3R

    has a reported rate at 215°C

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    -1, = 10‘2CE, mol/l.sec

    Find the space time needed for 80% conversion of a 50% A-50% inert feed to a plug flow reactor operating at 215°C and 5 atm (Ca0=0.0625 mol/l).

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  9. (a) Explain the mechanism for the enzyme-substrate reaction of Michaelis-Menton. 07

    (b) Derive the expression for the rate. 07


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This download link is referred from the post: BHMS Last 10 Years 2011-2021 Previous Question Papers (Bachelor of Homeopathic Medicine and Surgery)