Diffusion and Reaction in a Porous Catalysts: ConcepTest and Example Problem

Try to answer this ConcepTest and solve the example problem before using this module. Studies show that trying to answer questions before studying material improves learning and retention. We suggest that you write down the reasons for your answers. By the end of this module, you should be able to answer these on your own. Answers will be given at the end of this module.

Image of a concepTest for the Diffusion and Reaction in Porous Catalysts Module on LearnChemE.com.
Example Problem 1

The first-order reaction A → B takes place in a spherical catalyst pellet. The effectiveness factor due to diffusion limitations in the catalyst pores is 0.80, When the same reaction is carried out in a catalyst pellet whose diameter is four times larger, how much larger is the total rate of reaction?