A few questions on chemical reaction engineering
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6-6 For a single reaction with a reaction order greater than zero, as the conversion rate increases, the volume ratio of the complete mixing reactor to the plug flow reactor required ( ) (1) remains unchanged (2) increases (3) decreases (4) it’s not certain. 6-7 For a single reaction with a reaction order greater than zero, as the reaction order increases, the volume ratio of the complete mixing reactor to the plug flow reactor required to achieve a certain outlet conversion rate ( ) (1) remains unchanged (2) increases (3) decreases (4) it’s not certain. 6-8 For a single reaction with a reaction order greater than zero, with the outlet conversion rate and reaction order remaining constant, as the expansion factor increases, the volume ratio of the complete mixing reactor to the plug flow reactor required ( ) (1) remains unchanged (2) increases (3) decreases (4) it’s not certain. Please provide answers to the several questions encountered in this complex process; detailed explanations would be appreciated. Thank you all!
6-6 Answer: (2); the higher the required conversion rate, the larger the ratio, as there is backmixing in fully mixed flow reactions. 6-7 Answer: (2); the higher the number of stages, the faster the velocity changes, which requires a larger reactor volume. Backmixing in fully mixed flow reactions is detrimental to the reaction; therefore, the greater the increase in volume, the larger the ratio becomes. 6-8 Answer: (2); the larger the expansion factor, the faster the reactant concentration decreases, resulting in a higher conversion rate, and thus a larger ratio.
Thank you so much, hero! As long as you consider backmixing, it’s easy to understand; impressive!