Butadiene and steam (0.5 mol steam/mol butadiene) are fed to a tubular flow reactor operating at 1180°F and a constant p

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Butadiene And Steam 0 5 Mol Steam Mol Butadiene Are Fed To A Tubular Flow Reactor Operating At 1180 F And A Constant P 1 (109.78 KiB) Viewed 10 times

Butadiene and steam (0.5 mol steam/mol butadiene) are fed to a tubular flow reactor operating at 1180°F and a constant pressure of 1 atm. The reactor is not catalytic. Considering only the reversible polymerization reaction to the dimer, determine: (a) the length of a 4-in. ID reactor required to obtain 40% conversion of butadiene at a total feed rate of 20 mol lb/h; and b) the space velocity in liters per hour of the feed gas (at 1180°F and 1 atm) divided by the volume of the reactor in liters, required to obtain a conversion of 40%. The polymerization reaction is second order and has a specific rate constant given by the following equation: log k = 5470 T +8.063 Where k is the polymerized C4H4, in moles g/(L h atm2), and T is in degrees Kelvin. The reverse reaction (depolymerization) is first order. At 1180°F (911 K), the equilibrium constant for the reaction is 1.27.