Pressure in Packed Bed Reactors: Example Problems

Try to solve these problems before watching the solutions in the screencasts.

Example Problem 1

A gas flows through a packed bed. Using the properties of the packed bed and of the gas, determine the outlet pressure.

Packed bedFeed Gas
void fraction = 0.4050 kg/h feed rate
particle diameter = 0.5 cmmolecular weight = 55 g/mol
inside diameter tube = 5 cmviscosity = 2.3 x 10-5 kg/m·s
length = 30 mpressure = 12 bar
150°C, isothermal 
Example Problem 2

A first-order reaction takes place in a packed bed catalytic reactor. The conversion is 40%. The reactor length was increased by 50% in order to increase productivity, but equipment limitations required the inlet and outlet pressure to remain constant. How much did the conversion increase?

image for an example problem on LearnChemE.com