Catalytic degradation of ethylene oxide over Ag/α-Al2O3

Jacob H. Miller; Aniket Joshi; Xinyu Li; Aditya Bhan

doi:10.1016/j.jcat.2020.07.008

Catalytic degradation of ethylene oxide over Ag/α-Al₂O₃

Jacob H. Miller, Aniket Joshi, Xinyu Li, Aditya Bhan

Chemical Engineering and Materials Science

Research output: Contribution to journal › Article › peer-review

19 Scopus citations

Abstract

Ethylene oxide (EO) degradation over Ag/α-Al₂O₃ catalysts involves bifunctional pathways, whereby α-Al₂O₃ surfaces catalyze hydration, isomerization, dimerization, and oxidation while Ag surfaces facilitate combustion and isomerization of ethylene oxide. EO degradation reactions run over Ag/α-Al₂O₃, α-Al₂O₃, and intrapellet mixtures thereof with co-feeds of O₂ and oxygenate products show that Ag surfaces are more reactive than α-Al₂O₃ and that oxygenate products generated over α-Al₂O₃ combust over Ag much more (>30x) readily than EO. These observations suggest that additives which mitigate surface hydration of α-Al₂O₃ and combustion activity of Ag will most effectively mitigate EO degradation.

Original language	English (US)
Pages (from-to)	714-720
Number of pages	7
Journal	Journal of Catalysis
Volume	389
DOIs	https://doi.org/10.1016/j.jcat.2020.07.008
State	Published - Sep 2020

Bibliographical note

Funding Information:
Parts of this work were carried out in the Characterization Facility, University of Minnesota , which receives partial support from NSF through the MRSEC program. The authors gratefully acknowledge Prof. David Poerschke and Ms. Eeshani Godbole for assistance with Al 2 O 3 synthesis and Prof. James Harris, Mr. Krishna Iyer, Mr. Brandon Foley, and Dr. Sandeep Dhingra for helpful technical discussions. The authors acknowledge generous funding from Dow through the University Partnership Initiative. JHM acknowledges financial support from the University of Minnesota Doctoral Dissertation Fellowship and a 3M departmental fellowship .

Publisher Copyright:
© 2020 Elsevier Inc.

Copyright:
Copyright 2020 Elsevier B.V., All rights reserved.

Keywords

Ag
Epoxidation
Ethylene oxide
Reaction pathways
α-AlO

Publisher link

10.1016/j.jcat.2020.07.008

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Cite this

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title = "Catalytic degradation of ethylene oxide over Ag/α-Al2O3",

abstract = "Ethylene oxide (EO) degradation over Ag/α-Al2O3 catalysts involves bifunctional pathways, whereby α-Al2O3 surfaces catalyze hydration, isomerization, dimerization, and oxidation while Ag surfaces facilitate combustion and isomerization of ethylene oxide. EO degradation reactions run over Ag/α-Al2O3, α-Al2O3, and intrapellet mixtures thereof with co-feeds of O2 and oxygenate products show that Ag surfaces are more reactive than α-Al2O3 and that oxygenate products generated over α-Al2O3 combust over Ag much more (>30x) readily than EO. These observations suggest that additives which mitigate surface hydration of α-Al2O3 and combustion activity of Ag will most effectively mitigate EO degradation.",

keywords = "Ag, Epoxidation, Ethylene oxide, Reaction pathways, α-AlO",

author = "Miller, {Jacob H.} and Aniket Joshi and Xinyu Li and Aditya Bhan",

note = "Funding Information: Parts of this work were carried out in the Characterization Facility, University of Minnesota , which receives partial support from NSF through the MRSEC program. The authors gratefully acknowledge Prof. David Poerschke and Ms. Eeshani Godbole for assistance with Al 2 O 3 synthesis and Prof. James Harris, Mr. Krishna Iyer, Mr. Brandon Foley, and Dr. Sandeep Dhingra for helpful technical discussions. The authors acknowledge generous funding from Dow through the University Partnership Initiative. JHM acknowledges financial support from the University of Minnesota Doctoral Dissertation Fellowship and a 3M departmental fellowship . Publisher Copyright: {\textcopyright} 2020 Elsevier Inc. Copyright: Copyright 2020 Elsevier B.V., All rights reserved.",

year = "2020",

month = sep,

doi = "10.1016/j.jcat.2020.07.008",

language = "English (US)",

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pages = "714--720",

journal = "Journal of Catalysis",

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AU - Miller, Jacob H.

AU - Joshi, Aniket

AU - Li, Xinyu

AU - Bhan, Aditya

N1 - Funding Information: Parts of this work were carried out in the Characterization Facility, University of Minnesota , which receives partial support from NSF through the MRSEC program. The authors gratefully acknowledge Prof. David Poerschke and Ms. Eeshani Godbole for assistance with Al 2 O 3 synthesis and Prof. James Harris, Mr. Krishna Iyer, Mr. Brandon Foley, and Dr. Sandeep Dhingra for helpful technical discussions. The authors acknowledge generous funding from Dow through the University Partnership Initiative. JHM acknowledges financial support from the University of Minnesota Doctoral Dissertation Fellowship and a 3M departmental fellowship . Publisher Copyright: © 2020 Elsevier Inc. Copyright: Copyright 2020 Elsevier B.V., All rights reserved.

PY - 2020/9

Y1 - 2020/9

N2 - Ethylene oxide (EO) degradation over Ag/α-Al2O3 catalysts involves bifunctional pathways, whereby α-Al2O3 surfaces catalyze hydration, isomerization, dimerization, and oxidation while Ag surfaces facilitate combustion and isomerization of ethylene oxide. EO degradation reactions run over Ag/α-Al2O3, α-Al2O3, and intrapellet mixtures thereof with co-feeds of O2 and oxygenate products show that Ag surfaces are more reactive than α-Al2O3 and that oxygenate products generated over α-Al2O3 combust over Ag much more (>30x) readily than EO. These observations suggest that additives which mitigate surface hydration of α-Al2O3 and combustion activity of Ag will most effectively mitigate EO degradation.

AB - Ethylene oxide (EO) degradation over Ag/α-Al2O3 catalysts involves bifunctional pathways, whereby α-Al2O3 surfaces catalyze hydration, isomerization, dimerization, and oxidation while Ag surfaces facilitate combustion and isomerization of ethylene oxide. EO degradation reactions run over Ag/α-Al2O3, α-Al2O3, and intrapellet mixtures thereof with co-feeds of O2 and oxygenate products show that Ag surfaces are more reactive than α-Al2O3 and that oxygenate products generated over α-Al2O3 combust over Ag much more (>30x) readily than EO. These observations suggest that additives which mitigate surface hydration of α-Al2O3 and combustion activity of Ag will most effectively mitigate EO degradation.

KW - Ag

KW - Epoxidation

KW - Ethylene oxide

KW - Reaction pathways

KW - α-AlO

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