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    Removal of carbon dioxide and water using a solid amine adsorption bed for extended space flight

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    Author
    Fuller, Deidra Korwald
    Date
    1993
    Degree
    Master of Science
    Abstract
    An enhanced solid amine based regenerative CO$\sb2$ and H$\sb2$O removal system is being used for the shuttle extended duration orbiter (EDO) missions. A computer model was developed to predict the adsorption of carbon dioxide and water onto a polyethyleneimine coated acrylic ester substrate (designated HSC+). Nineteen experimental adsorption breakthrough tests were conducted using a test bench at NASA/Johnson Space Center, Houston, Texas. CO$\sb2$ and H$\sb2$O adsorption equilibrium data was obtained. Analytical equations were developed to predict the overall water and carbon dioxide equilibrium on HSC+. This data was then used to develop a dynamic model which predicts the rate at which carbon dioxide and water are adsorbed. The model was based on a finite difference method to obtain a system of ordinary differential equations which were solved simultaneously using a fourth order Runga-Kutta method. Comparison of the breakthrough curves with the model for both CO$\sb2$ and H$\sb2$O show that the model predicts both CO$\sb2$ and H$\sb2$O adsorption rates at various conditions accurately.
    Keyword
    Chemical engineering
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    Managed by the Digital Scholarship Services at Fondren Library, Rice University
    Physical Address: 6100 Main Street, Houston, Texas 77005
    Mailing Address: MS-44, P.O.BOX 1892, Houston, Texas 77251-1892