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dc.contributor.author
Ihli, Johannes
dc.contributor.author
Bloch, Leonid
dc.contributor.author
Boecklein, Sebastian
dc.contributor.author
Rzepka, Przemyslaw
dc.contributor.author
Burghammer, Manfred
dc.contributor.author
da Silva, Julio C.
dc.contributor.author
Mestl, Gerhard
dc.contributor.author
van Bokhoven, Jeroen A.
dc.date.accessioned
2021-09-01T14:34:05Z
dc.date.available
2021-07-24T02:34:00Z
dc.date.available
2021-09-01T14:34:05Z
dc.date.issued
2021
dc.identifier.issn
2155-5435
dc.identifier.other
10.1021/acscatal.1c01744
en_US
dc.identifier.uri
http://hdl.handle.net/20.500.11850/497416
dc.description.abstract
The selective oxidation of n-butane over vanadium phosphorus oxides to maleic anhydride is a crucial step in the production of unsaturated polyester resins. As the demand for maleic anhydride is steadily increasing, we are urged to develop heterogeneous catalysts of still higher productivity and a longer lifetime. To satisfy this demand, we require knowledge of the conversion process on the molecular level, the structure of the catalyst on the nanometer level, for example, the exposure of active sites in nanoporous and millimeter-sized catalyst bodies or pellets, and an understanding of how these pellets behave within the industrial setting. Here, using scanning X-ray diffraction, we visualize how industrial reactor operation affects commercial porous Raschig-ring-type pellets. The examination of a pristine catalyst pellet and two pellets extracted from an industrial reactor after 4 years of operation, one from the reactor hot-spot zone, revealed a series of structural and compositional modifications that can be linked to a decreasing catalyst performance and a low degree of pore utilization and hence a spatially non-uniform utilization of the catalyst pellets. Specifically, we observe how the suggested differential thermal stress and diffusion limitations induce a radial transformation of the pellets. This process is intensified in the hot-spot zone. We hope these observations reiterate the importance of characterizing heterogeneous catalysts at all length scales to contextualize catalyst performance and provide insights that can help to optimize the design of catalyst bodies for the industrial setting. © 2021 American Chemical Society
en_US
dc.language.iso
en
en_US
dc.publisher
American Chemical Society
en_US
dc.subject
heterogeneous catalysis
en_US
dc.subject
vanadyl pyrophosphate
en_US
dc.subject
industrial catalysis
en_US
dc.subject
X-ray microscopy
en_US
dc.subject
X-ray diffraction
en_US
dc.title
Evolution of Heterogeneity in Industrial Selective Oxidation Catalyst Pellets
en_US
dc.type
Journal Article
dc.date.published
2021-06-22
ethz.journal.title
ACS Catalysis
ethz.journal.volume
11
en_US
ethz.journal.issue
13
en_US
ethz.journal.abbreviated
ACS Catal.
ethz.pages.start
8274
en_US
ethz.pages.end
8283
en_US
ethz.identifier.wos
ethz.publication.place
Washington, DC
en_US
ethz.publication.status
published
en_US
ethz.leitzahl
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02020 - Dep. Chemie und Angewandte Biowiss. / Dep. of Chemistry and Applied Biosc.::02516 - Inst. f. Chemie- und Bioingenieurwiss. / Inst. Chemical and Bioengineering::03746 - Van Bokhoven, Jeroen A. / Van Bokhoven, Jeroen A.
ethz.leitzahl.certified
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02020 - Dep. Chemie und Angewandte Biowiss. / Dep. of Chemistry and Applied Biosc.::02516 - Inst. f. Chemie- und Bioingenieurwiss. / Inst. Chemical and Bioengineering::03746 - Van Bokhoven, Jeroen A. / Van Bokhoven, Jeroen A.
ethz.date.deposited
2021-07-24T02:34:17Z
ethz.source
WOS
ethz.eth
yes
en_US
ethz.availability
Metadata only
en_US
ethz.rosetta.installDate
2021-09-01T14:34:19Z
ethz.rosetta.lastUpdated
2023-02-06T22:23:26Z
ethz.rosetta.versionExported
true
ethz.COinS
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