Dynamics of CO<sub>2</sub> Adsorption on Amine Adsorbents.
1. Impact of Heat Effects
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Abstract
The packed bed heat and mass transfer dynamics of CO<sub>2</sub> adsorption onto a 3-aminopropylsilyl-functionalized SBA-15
silica
material are reported. Concentration measurements at the outlet of
the packed bed and temperature profiles inside the bed are measured
simultaneously. Heat and mass transfer models in conjunction with
the linear driving force rate model are used to simulate the concentration
and temperature profiles in the bed. The heat and mass transfer processes
in the amine adsorbent packed bed are successfully captured by the
model, and comparison of isothermal and nonisothermal models reveals
that isothermal models provide an accurate description of the dynamic
mass transport behavior in the adsorption column under the experimental
conditions used in this study. The results help establish that under
certain experimental conditions, heat effects in amine adsorbent packed
beds have a negligible effect on CO<sub>2</sub> breakthrough, and
simple isothermal models can be used to accurately assess adsorption
kinetics