Chemical Reaction Engineering
A space velocity of 5 hr⁻¹ means that

A fixed conversion of a given batch of feed takes 5 hours
After every 5 hours, reactor is being filled with the feed
Five reactor volumes of feed (at specified conditions) are being fed into the reactor per hour
Cent per cent conversion can be achieved in at least 5 hours

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Chemical Reaction Engineering
"A spherical porous catalyst particle of radius R is subjected to reactant A which reacts to form B by a zero order surface reaction A → B. Film mass transfer resistance is negligible and pore diffusion of A is rate controlling. The effectiveness factor of the catalyst is reported as 7/8. Which of the following statement is true?A. Inner catalyst core of radius R/8 does not participate in reaction."

Inner catalyst core of radius R/2 does not participate in reaction
Inner catalyst core of radius R/8 does not participate in reaction
Ffectiveness factor for a zero order reaction can not be 7/8 as it must always be 1
Inner catalyst core of radius 7R/8 does not participate in reaction

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