CHM ENG 142 Study Guide - Midterm Guide: Horse Length, Rate Equation, Bayerischer Rundfunk

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redcockroach875

9 May 2020

School

Berkeley

Department

Chemical and Biomolecular Engineering

Course

CHM ENG 142

Professor

All

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Due: friday, march 20, 2020: recycle reactor. Gas-phase reaction a b has rate law -r a = kc a /(1 + 2c a ) 2 with k = 1 s -1 . This reaction is carried out in a 10 l pfr with a recycle stream from the outlet back to the inlet of the pfr. The flow rate of the recycle stream is determined by the recycle parameter r, which is defined as the ratio between the flow rate of the recycle stream and the flow rate of the exit stream. Since flow rate is constant, c a = c a0 (1 - x a ) Therefore c a0 v 0 (-dx a /dv) = -kc a0 (1 - x a ) / [1 + 2 c a0 (1 - x a )] 2. Plug in values: dx a /dv = (1 - x a ) / [1 + 2 (1 - x a )] 2.

Related Questions

Part d?

Genetically engineered strains of Escherichia coli have become essential tools in the production of recombinant human peptides and proteins. One of the first substances synthesiszed using engineered E. coli was recombinant human insulin, or humulin, for the treatment of people suffering from type I diabetes mellitus. A simple reaction scheme for the production of humulin is described below. Bacteria consume glucose under aerobic conditions, and produce humulin and biomass. C_6H_12O_6 (glucose) + O_2 +NH_3 (ammonia) rightarrow C_2.3 H_2.8O_1.8 N (humulin) + CH_1.9O_0.3 N_0.3 (biomass) + CO_2 + H_2O A typical humulin production scheme consists of E. coli cultured in a large bioreactor. A continuous stream of media is fed into the reactor. A continuous stream of products and unused reactants is removed from the bioreactor for further processing, including purification of the humulin for therapeutic use. Media containing glucose and ammonia is fed into the reactor at a rate of 100 L/hr; the concentrations of glucose and ammonia in that stream are 150 mM and 50 mM, respectively. Pure oxygen gas is sparged (i.e., bubbled) into the reactor at a rate of 100 mL/min. The exit flow rate of liquid containing biomass, product, and excess reactant is 100 L/hr. Assume that there is no accumulation in the system. Assume that the reaction goes to completion. Write element balances for C, H, O, and N. Write two additional balance equations given the following information: RQ = 0.5. The ratio of humulin to biomass production is 1:5. Solve for the stoichiometric coefficients to balance the equation. Determine the inlet molar flow rates of glucose, oxygen, and ammonia in mol/hr. In this bioreactor, temperature is 310 K and pressure is 1 atm. Determine the limiting reactant, the reaction rate (R), and the fractional conversion of glucose. Calculate the molar flow rates of all constituents leaving the bioreactor. The desired output of the bioreactor is 1 kg/day of humulin. Can this output he achieved by increasing the oxygen flow rate? Justify.

CHM ENG 142 Study Guide - Midterm Guide: Horse Length, Rate Equation, Bayerischer Rundfunk

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