A partial oxidation is carried out by passing air with 1.2 mole percent (mol %) hydrocarbon through 40-mm tubes packed with 2 m of 3-mm by 3-mm cylindrical catalyst pellets. The air enters at 350°C and 2.0 atm with a superficial velocity of 1 m/s. What is the pressure drop through the packed tubes? How much would the pressure drop be reduced by using 4-mm pellets? Assume ε = 0.40.

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