Doctoral Dissertations

Leon L. Otte

Abstract

Paper 1: "A hydrodynamic mixing (HDM) model, used to calculate the steady-state spatial distribution of conversion for a second-order reaction in a continuous stirred-tank reactor (CSTR) for non-premixed reactants was developed and contrasted with other methods. The HDM model is based on a segmental description of the reactor and includes turbulent mixing effects in each segment. As a test of the model, the experimental results obtained from a tubular reactor were found to be very well represented for a range of reactant ratios. Spatial distributions of concentration and segregation intensity (degree of mixing) within the CSTR were determined for a variety of reactor operating conditions for an isothermal reactor and, in addition, the spatial distribution of temperature was calculated for a non-isothermal reactor. That extension of the model was simple and straight-forward, since distributions of conversion were already available from the main model"--Abstract, page 2.

Paper 2: "The time-varying response of an incompletely mixed continuous stirred-tank reactor (CSTR) with second-order reaction is described by an extension of the hydrodynamic mixing (HDM) model. It generates the spatial time responses of concentration and segregation intensity which result from variations in impeller speed or reactant feed rates of non-premixed feeds. These responses were determined at various levels of feed rate, reaction rate constant, and impeller speed.

The validity of the HDM model for mixing alone was established by comparison with experimental data. The time-varying HDM model is based on a segmented description of the mixer-reactor and includes turbulent mixing effects within each segment. The advantages over simplified models are demonstrated by comparison of HDM model responses with responses obtained from a segmented model with segregation effects suppressed and from models based on perfect back-mixing"--Abstract, page 69.

Advisor(s)

Patterson, G. K. (Gary Kent), 1939-

Committee Member(s)

Waggoner, Raymond C.
Kern, Frank J.
Flanigan, V. J.
Johnson, Charles A.

Department(s)

Chemical and Biochemical Engineering

Degree Name

Ph. D. in Chemical Engineering

Sponsor(s)

Shell Oil Company
American Oil Company
University of Missouri--Rolla. Department of Chemical Engineering

Publisher

University of Missouri--Rolla

Publication Date

1974

Journal article titles appearing in thesis/dissertation

  • Steady-state distribution of conversion and the degree of mixing for second-order reactions in a continuous stirred-tank reactor
  • Unsteady-state distribution of conversion and the degree of mixing for second-order reactions in a continuous stirred-tank reactor

Pagination

xix, 196 pages

Note about bibliography

Includes bibliographical references.

Rights

© 1974 Leon L. Otte, All rights reserved.

Document Type

Dissertation - Open Access

File Type

text

Language

English

Subject Headings

Chemical reactorsChemical kineticsMass transfer -- Mathematical models

Thesis Number

T 3006

Print OCLC #

6011707

Electronic OCLC #

913873401

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