Doctoral Dissertations


Chi Min Shu


"When more components than desired are adsorbed, conventional adsorption-desorption separation process may not be satisfactory or may need further separation procedures, even though one is highly preferentially adsorbed. This study is on a method termed Variable-Temperature Stepwise Desorption (VTSD), which can enhance the separation during desorption when more components than desired are adsorbed. The separation of mixtures of propane and propylene, ethanol and water, and hydrogen sulfide-carbon dioxide-propane may be improved by VTSD.

To investigate the VTSD method, a pilot column was set up and tested for the separation of propane and propylene and hydrogen sulfide, carbon dioxide, and propane, after adsorption on molecular sieves, 13X.

A differential thermal desorber was modified and was used to determine the rates and apparent equilibrium of propane-propylene mixtures adsorbing and desorbing on molecular sieves.

A computer algorithm was developed to predict VTSD results from desorption equilibrium data. Using the equilibrium data determined on the thermal desorber and the algorithm, the concentrations and quantities desorbed for pilot-scale runs were estimated at various desorption temperatures. These estimated results were near those determined in experimental runs "--Abstract, page iii.


Findley, Marshall E., 1927-1991

Committee Member(s)

Liapis, Athanasios I.
Bertrand, Gary L.
Poling, Bruce E.
Patel, Jagdish K.


Chemical and Biochemical Engineering

Degree Name

Ph. D. in Chemical Engineering


United States. Department of Energy
National Science Foundation (U.S.)


Financial support by Department of Energy Grant Number DEFG 0187CE15304


University of Missouri--Rolla

Publication Date

Summer 1990


xxiv, 294 pages

Note about bibliography

Includes bibliographical references (pages 143-153).


© 1990 Chi Min Shu, All rights reserved.

Document Type

Dissertation - Restricted Access

File Type




Subject Headings

Adsorption -- Computer simulation
Thermal desorption
Materials -- Analysis -- Data processing

Thesis Number

T 6082

Print OCLC #


Electronic OCLC #


Link to Catalog Record

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