Past Questions

Question 1 The elementary reacion between Sulphur and oxygen 10 produce Sulplut (IV) Oxide occurs in a given renctor with the initial concentrations of the renctants being a firction of the stoichionietrie equation. (1) Obtain the volume of reactor required to affain 95% conversion of Sulphur in a) A Condimins Sfined Tank Reactor (CSTI) b) A Plue. How Reacior (IFT) (ii) Which renctor would you recommend for this process and why. AA I =KCS Take: Cs0=25mol/m3:K=0.35m1:Fso=100mol/hr 30MAKKS=KCMit Oncsion 2 A gas-phase oxidation of elhytene (A) to ethylene oxide is camed outin a CSIR with ehrylene 35 the limiling reactant. The rate of roaction given in terms of noie fraction of the reacling species in a functicn of the stoichiomety of the balanced chemical equation 1) Develop a stoichionetric/Mole Table for the reaciants and produst i4) Express the rate of reaction im terms fractional conversion of eflnlene (A) iii) Detenmine the volume of the CSTR requived to attain 95% conversion of ethyfene Use irypothetical values for any process variable required 20 MARKS Question 3 The reaction AB occurs in the reaclor svstem belon: The rate of reaction in each renclor is the same and given by: (rA1)=(0.5(iXA)2 Obtan the Fractional Conversion altaned at the exit of each reactor. 20 MABKS Question 4 The renction AB with Tust order knetics occurs in who reactois comected in series. The fractional conversion in the first and second reactors (no mntrer which omes first) is 0.55 and 0.96 respectively. Which reacior configumation woukd you reconmend for th s process? i) CSTRs in Series ii) A CSTR followed by a PTR The molar Gow rates into the first and second reactors are 6,(1 and 45 molth: the initiol. iii) A PFR followed by a CSTR concentration of reactant A is 30 molimn" the rate constant is 0.5,him1 20M MRK Question 1 The elementary reacion between Sulphur and oxygen 10 produce Sulplut (IV) Oxide occurs in a given renctor with the initial concentrations of the renctants being a firction of the stoichionietrie equation. (1) Obtain the volume of reactor required to affain 95% conversion of Sulphur in a) A Condimins Sfined Tank Reactor (CSTI) b) A Plue. How Reacior (IFT) (ii) Which renctor would you recommend for this process and why. AA I =KCS Take: Cs0=25mol/m3:K=0.35m1:Fso=100mol/hr 30MAKKS=KCMit Oncsion 2 A gas-phase oxidation of elhytene (A) to ethylene oxide is camed outin a CSIR with ehrylene 35 the limiling reactant. The rate of roaction given in terms of noie fraction of the reacling species in a functicn of the stoichiomety of the balanced chemical equation 1) Develop a stoichionetric/Mole Table for the reaciants and produst i4) Express the rate of reaction im terms fractional conversion of eflnlene (A) iii) Detenmine the volume of the CSTR requived to attain 95% conversion of ethyfene Use irypothetical values for any process variable required 20 MARKS Question 3 The reaction AB occurs in the reaclor svstem belon: The rate of reaction in each renclor is the same and given by: (rA1)=(0.5(iXA)2 Obtan the Fractional Conversion altaned at the exit of each reactor. 20 MABKS Question 4 The renction AB with Tust order knetics occurs in who reactois comected in series. The fractional conversion in the first and second reactors (no mntrer which omes first) is 0.55 and 0.96 respectively. Which reacior configumation woukd you reconmend for th s process? i) CSTRs in Series ii) A CSTR followed by a PTR The molar Gow rates into the first and second reactors are 6,(1 and 45 molth: the initiol. iii) A PFR followed by a CSTR concentration of reactant A is 30 molimn" the rate constant is 0.5,him1 20M MRK