2. The microbial synthesis of 1,3-propanediol is being developed to manufacture sustainable, green polyester fabric from renewable resources. Under anerobic conditions, a strain of Kielbasa numbskull converts glycerol (C3H8O3) to 1,3-propanediol (C3H8O2) and acetic acid (C2H4O2) without other fermentation products. The fermentation and cell growth equation is as follows, with C4H7O2N representing biomass (cell growth, see section 4.6) in the product. 68 C3H8O3 + 3 NH3 → 3 C4H7O₂N + 49 C3H8O2 + 15 C2H4O2 + 15 CO2 + 40 H₂O A continuous fermenter is set up for 1,3-propanediol production at 37°C and atmospheric pressure. Anaerobic conditions are maintained by sparging the fermenter with N2 at a flow rate of 1000 L/min. The media contains ammonia NH3 and 14% w/w glycerol and is fed into the fermenter at 1000 kg/hr. To prevent side reactions, the product stream contains unreacted glycerol at a concentration of 3% w/w. a. What is the volumetric flow rate and composition of the off gas? b. What minimum concentration of NH3 is needed in the feed? c. If the NH3 concentration you found in (b) is used, what is the concentration of 1,3- propanediol in the product?
2. The microbial synthesis of 1,3-propanediol is being developed to manufacture sustainable, green polyester fabric from renewable resources. Under anerobic conditions, a strain of Kielbasa numbskull converts glycerol (C3H8O3) to 1,3-propanediol (C3H8O2) and acetic acid (C2H4O2) without other fermentation products. The fermentation and cell growth equation is as follows, with C4H7O2N representing biomass (cell growth, see section 4.6) in the product. 68 C3H8O3 + 3 NH3 → 3 C4H7O₂N + 49 C3H8O2 + 15 C2H4O2 + 15 CO2 + 40 H₂O A continuous fermenter is set up for 1,3-propanediol production at 37°C and atmospheric pressure. Anaerobic conditions are maintained by sparging the fermenter with N2 at a flow rate of 1000 L/min. The media contains ammonia NH3 and 14% w/w glycerol and is fed into the fermenter at 1000 kg/hr. To prevent side reactions, the product stream contains unreacted glycerol at a concentration of 3% w/w. a. What is the volumetric flow rate and composition of the off gas? b. What minimum concentration of NH3 is needed in the feed? c. If the NH3 concentration you found in (b) is used, what is the concentration of 1,3- propanediol in the product?
Introduction to Chemical Engineering Thermodynamics
8th Edition
ISBN:9781259696527
Author:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Publisher:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Chapter1: Introduction
Section: Chapter Questions
Problem 1.1P
Related questions
Question
Transcribed Image Text:2. The microbial synthesis of 1,3-propanediol is being developed to manufacture sustainable,
green polyester fabric from renewable resources. Under anerobic conditions, a strain of
Kielbasa numbskull converts glycerol (C3H8O3) to 1,3-propanediol (C3H8O2) and acetic acid
(C2H4O2) without other fermentation products. The fermentation and cell growth equation is
as follows, with C4H7O2N representing biomass (cell growth, see section 4.6) in the product.
68 C3H8O3 + 3 NH3 → 3 C4H7O₂N + 49 C3H8O2 + 15 C2H4O2 + 15 CO2 + 40 H₂O
A continuous fermenter is set up for 1,3-propanediol production at 37°C and atmospheric
pressure. Anaerobic conditions are maintained by sparging the fermenter with N2 at a flow
rate of 1000 L/min. The media contains ammonia NH3 and 14% w/w glycerol and is fed into
the fermenter at 1000 kg/hr. To prevent side reactions, the product stream contains unreacted
glycerol at a concentration of 3% w/w.
a. What is the volumetric flow rate and composition of the off gas?
b. What minimum concentration of NH3 is needed in the feed?
c. If the NH3 concentration you found in (b) is used, what is the concentration of 1,3-
propanediol in the product?
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