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Methyl Iodide Adsorption on Reduced Silver-Functionalized Silica Aerogel: How Temperature Impacts the Adsorption?
  • Siqi Tang,
  • Seungrag Choi,
  • Lawrence Tavlarides
Siqi Tang
Syracuse University
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Seungrag Choi
Syracuse University
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Lawrence Tavlarides
Syracuse University
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Abstract

To understand the effect of temperature to the adsorption, 104 ppbv and 1044 ppbv methyl iodide (CH3I) adsorptions on reduced silver-functionalized silica aerogel (Ag0-Aerogel) at 100, 150 and 200 ℃ were performed. In the experiments, a significantly high uptake rate (3 – 4 times higher than that at 100 and 150 ℃) was observed for the 104 ppbv adsorption at 200 ℃. To explain such behavior, a potential reaction pathway was proposed and multiple physical analyses including nitrogen titration, x-ray photoelectron spectroscopy (XPS) and scanning electron microscopy (SEM) were performed. Based on the results, the contributing factors appear to be the formation of different Ag-I components induced by temperature, higher silver site availability, decreasing diffusion limitation, and increasing reaction rate described by the Arrhenius relationship.

Peer review status:UNDER REVIEW

07 May 2021Submitted to AIChE Journal
12 May 2021Assigned to Editor
12 May 2021Submission Checks Completed
26 May 2021Reviewer(s) Assigned