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2003 Course Chemical Process Synthesis

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Total No. of Questions : 12] [Total No. of Pages : 3 [3864] - 323 P 1089 B.E. (Chemical Engg.) CHEMICAL PROCESS SYNTHESIS (2003 Course) (409344) Time : 3 Hours] [Max. Marks : 100 Instructions to the candidates: 1) Answers to the two sections should be written in separate answer books. 2) Assume suitable data, if necessary. 3) Neat diagrams must be drawn wherever necessary. 4) Figures to the right indicate full marks. SECTION - I Q1) a) b) Synthesize a detailed process for acetone production from isopropanol with hydrogen as a byproduct, considering : i) Formulation of design problem, ii) Hierarchy and iii) Approaches to chemical process design. [12] Explain grassroot design. [4] OR Q2) a) b) Discuss in detail the onion model of process design. Explain the role of catalyst in the choice of reactor. Q3) a) Benzene is produced from toluene according to the reaction C6H5CH3 + H2 C6H6 + CH4. Some of the benzene formed undergoes a secondary reaction in series to an unwanted byproduct diphenyl, according to the reaction 2C6H6 C12H10 + H2. The following table gives the composition of the reactor feed and effluent streams. Calculate the conversion, selectivity and reactor yield with respect to i) Toluene feed and ii) Hydrogen feed. [12] Component Inlet flow rate (kmol/h) Outlet flow rate (kmol/h) 1858 1583 H2 804 1083 CH4 13 282 C6H5 C6H5CH3 372 93 0 4 C12H10 Explain reaction system for multiple reactions in series producing byproduct. [4] b) [8] [8] P.T.O.

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