ChE 101 – Chemical Reaction Engineering Winter 2014 Homework #7 Due Tuesday, March 4, 2014 in class Read Schmidt, Chapters 5 and 10 NOTE: Please list all of your assumptionsand cite any external sources used when solving each problem. 1)Computational Problem of the Week:Allyl chloride is to be produced in a 25-ft long, 2-in ID tube operating as a PFR. The feed is a 4:1 molar ratio of propylene to chlorine and it enters at a feed rate of 0.85 lbmol/hr, 2 atm of pressure, and392𝑜𝑜𝐹𝐹. The reactor pressure may be assumed constant. 𝐶𝐶𝑙𝑙2+𝐶𝐶3𝐻𝐻6𝑘𝑘1→ 𝐶𝐶3𝐻𝐻5𝐶𝐶𝑙𝑙+𝐻𝐻𝐶𝐶𝑙𝑙𝐶𝐶𝑙𝑙2+𝐶𝐶3𝐻𝐻6𝑘𝑘2→ 𝐶𝐶3𝐻𝐻6𝐶𝐶𝑙𝑙2The rate coefficients have units of lbmol/(hr ft3atm2) and are: 𝑘𝑘1= 2.06𝑥𝑥105𝑒𝑒𝑥𝑥𝑒𝑒 �−27200𝑅𝑅𝑅𝑅�𝑘𝑘2= 11.7𝑒𝑒𝑥𝑥𝑒𝑒 �−6860𝑅𝑅𝑅𝑅�in which T is in oR and the gas constant R is 1.986 BTU/(lbmol oR). The rate expressions are: 𝑟𝑟1=𝑘𝑘1𝑃𝑃𝐶𝐶3𝐻𝐻6𝑃𝑃𝐶𝐶𝑙𝑙2𝑟𝑟2=𝑘𝑘2𝑃𝑃𝐶𝐶3𝐻𝐻6𝑃𝑃𝐶𝐶𝑙𝑙2The thermodynamic data for this reaction are listed in the following table: Component A B x 102C x 105 D x 109 𝐶𝐶𝑙𝑙26.432 0.8082 -0.9241 3.695 𝐶𝐶3𝐻𝐻60.866 5.602 -2.771 5.266 𝐶𝐶3𝐻𝐻5𝐶𝐶𝑙𝑙0.604 7.277 -5.442 17.42 𝐻𝐻𝐶𝐶𝑙𝑙7.235 -0.172 0.2976 -0.931 𝐶𝐶3𝐻𝐻6𝐶𝐶𝑙𝑙22.496 8.729 -6.219 18.49 Δ𝐻𝐻𝑟𝑟1-26,690 cal/mol (assumed to be constant) Δ𝐻𝐻𝑟𝑟2-44,080 cal/mol (assumed to be constant)
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