Homework2 - Chemical Engineering 142 Homework Set#2 100...

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: Chemical Engineering 142 Homework Set #2 100 points total Due Wednesday, February 3, 2010 Problem 1 (20 points) Consider the reactor scheme below, A liquid phase reaction, A + 2B → C, occurs at steady-state according to the following rate expression: k = 0.6 mol L-1 min-1 K = 1 L mol-1 The molar flow rate of B must be less than or equal to 1 mol min-1 to avoid unwanted side reactions. A side-stream (flow rate = 0.5 L min-1 ) containing B is added between the two reactors to increase the overall conversion of A. Reactors 1 and 2 are isothermal PFRs with volumes of 2 and 0.5 L, respectively. The inlet volumetric flow rate to reactor 1 is 2 L min-1 and remains constant during the reaction with inlet molar flow rates of 1 mol min-1 B and 1 mol min-1 A. (a) What molar flow rate of reactant B in the side-stream will maximize the conversion of A without producing side reactions? (b) What is the maximum overall conversion of A for the molar flow rate of B determined in part (a)? Make-up Stream Reactor 1 Reactor 2 Problem 2 (20 Points) In biological reactors, the growth rate is autocatalytic in that the more cells that you have, the greater the growth rate, cells + nutrients more cells + product The cell growth rate, r g , and the rate of nutrients consumption, r s , are directly proportional to the concentration of cells for a given set of conditions. A Levenspiel plot for this system is given below. Units of -1/rbelow....
View Full Document

This note was uploaded on 01/23/2011 for the course CHM 142 taught by Professor Hey during the Spring '10 term at Berkeley.

Page1 / 5

Homework2 - Chemical Engineering 142 Homework Set#2 100...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online