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Problem 2) Consider a bioprocess to generate acetic acid from ethanol [C2H5OF (g) → C2H3OOH (aq) + H2O (1)] using the bacterium Acetobacter acetii. Such processes are used in the commercial production of vinegar. In this process, a bioreactor that contains 65 kg of bacteria is charged with 9.50 x 10° L of a solution of ethanol and water that is 6.9% by weight ethanol and has a specific gravity of 0.988. Please note that the solution is formulated such that the bacteria can metabolize ethanol to acetic acid, but cannot grow. Dry air (79.0% N2 and 21.0% O2) is bubbled from

Problem 2) Consider a bioprocess to generate acetic acid from ethanol [C2H5OF (g) → C2H3OOH (aq) + H2O (1)] using the bacterium Acetobacter acetii. Such processes are used in the commercial production of vinegar. In this process, a bioreactor that contains 65 kg of bacteria is charged with 9.50 x 10° L of a solution of ethanol and water that is 6.9% by weight ethanol and has a specific gravity of 0.988. Please note that the solution is formulated such that the bacteria can metabolize ethanol to acetic acid, but cannot grow. Dry air (79.0% N2 and 21.0% O2) is bubbled from

Introduction to Chemical Engineering Thermodynamics
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
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Consider a bioprocess to generate acetic acid from ethanol [C2H5OH (aq) + O2 (g) → C2H3OOH (aq) + H20 (1)] using the bacterium Acetobacter acetii. Such processes are used in the commercial production of vinegar. In this process, a bioreactor that contains 65 kg of bacteria is charged with 9.50 x 103 L of a solution of ethanol and water that is 6.9% by weight ethanol and has a specific gravity of 0.988. Please note that the solution is formulated such that the bacteria can Problem 2) metabolize ethanol to acetic acid, but cannot grow. Dry air (79.0% N2 and 21.0% 02) is bubbled from the bottom of the reactor at a flowrate of 43 SCMH. A gas effluent exits the top of the reactor and during the bioconversion it is devoid of O2. The process begins and operates at 28 °C and 1 atm, and the gaseous feed enters at 25 °C. TH ern iclur ba c) Please calculate the standard heat of reaction for the reaction indicated in bold above. Please note that the heats of solution for ethanol and acetic acid at the dilutions used here are -9.1 kJ/mol and -0.3 kJ/mol, respectively.
Transcribed Image Text:Consider a bioprocess to generate acetic acid from ethanol [C2H5OH (aq) + O2 (g) → C2H3OOH (aq) + H20 (1)] using the bacterium Acetobacter acetii. Such processes are used in the commercial production of vinegar. In this process, a bioreactor that contains 65 kg of bacteria is charged with 9.50 x 103 L of a solution of ethanol and water that is 6.9% by weight ethanol and has a specific gravity of 0.988. Please note that the solution is formulated such that the bacteria can Problem 2) metabolize ethanol to acetic acid, but cannot grow. Dry air (79.0% N2 and 21.0% 02) is bubbled from the bottom of the reactor at a flowrate of 43 SCMH. A gas effluent exits the top of the reactor and during the bioconversion it is devoid of O2. The process begins and operates at 28 °C and 1 atm, and the gaseous feed enters at 25 °C. TH ern iclur ba c) Please calculate the standard heat of reaction for the reaction indicated in bold above. Please note that the heats of solution for ethanol and acetic acid at the dilutions used here are -9.1 kJ/mol and -0.3 kJ/mol, respectively.
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