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Analysis of Dynamic CO2 Capture over 13X Zeolite Monoliths in the Presence of SOx, NOx and Humidity
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  • Qasim Al-Naddaf,
  • Shane Lawson,
  • Ali Rownaghi,
  • Fateme Rezaei
Qasim Al-Naddaf
Missouri University of Science and Technology
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Shane Lawson
Missouri University of Science and Technology
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Ali Rownaghi
Missouri University of Science and Technology
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Fateme Rezaei
Missouri University of Science and Technology
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Abstract

In this investigation, CO2 capture performance of zeolite 13X monoliths with 600 and 800 cpsi in presence of SO2/NO impurities under dry and humid conditions were evaluated and compared with that of 13X beads. Dynamic breakthrough tests demonstrated a drastic reduction in CO2 capture capacity and deterioration of kinetics under dry-clean conditions, whereas, upon switching the feed from a clean gas to contaminated gas which contained SO2 and NO, different adsorption performance was observed. Specifically, in dry-contaminated mode, the adsorbents retained their capture capacities with comparable kinetics to that of dry-clean feed conditions, however, in humid-contaminated mode, the adsorbents experienced improved CO2 uptake and CO2/N2 selectivity, albeit at the expense of deteriorated kinetics. These findings indicate that the presence of SO2 and NO contaminants, especially SO2 contaminants, lead to dramatic changes in the adsorption performance of zeolite 13X monoliths, indicating the importance of evaluating adsorbent materials under realistic conditions.

Peer review status:ACCEPTED

19 Mar 2020Submitted to AIChE Journal
25 Mar 2020Submission Checks Completed
25 Mar 2020Assigned to Editor
13 Apr 2020Reviewer(s) Assigned
01 Jun 2020Editorial Decision: Revise Major
04 Jun 20201st Revision Received
05 Jun 2020Submission Checks Completed
05 Jun 2020Assigned to Editor
07 Jun 2020Reviewer(s) Assigned
10 Jun 2020Editorial Decision: Accept