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Homework-5-Spring-2010

# Homework-5-Spring-2010 - ....

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A packed bed reactor uses 0.5 cm diameter catalyst particles packed in a 4 cm inner diameter tubular reactor. The void fraction is 0.45. The catalyst density is 2000 kg/m 3 . Assume that the pressure drop in a packed bed reactor is described by Eqn 4.30, with α=.02 kg ‐1 . A gas‐phase reaction is conducted in the reactor, with stoichiometry A+2B goes to 3C+2D. The rate expression is . The reaction rate constant k is 24,000 L 2 mol ‐1 (kg catalyst) ‐1 hr ‐1 . The pressure at the reactor inlet is 10 atmospheres. The ambient pressure is 1 atmosphere. The feed to the reactor contains 25% A, 60 % B, and 15% inert gas. The inlet flow rate is 8 m 3 hr ‐1 . The reactor is operated so that the temperature is constant at 300 C.

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