Alkane isomerization on highly reduced Pd/Al2O3 catalysts. The crucial role of Pd-Al species

Monika Radlik , Artur Małolepszy , Krzysztof Matus , Anna Śrębowata , Wojciech Juszczyk , Piotr Dłużewski , Zbigniew Karpiński

Abstract

Highly reduced (at 500 and 600 °C) 1 wt% Pd/Al2O3 samples showed remarkable isomerization selectivity in n-hexane conversion, >80%, in agreement with previous reports. The catalytic behavior of highly reduced Pd/Al2O3 becomes typical of platinum, the metal regarded as unique in alkane isomerization. Although not detected in low metal loaded catalysts, Pd-Al species evidenced by formation of Pd-Al alloys in 5 wt% metal loaded catalysts appear essential active sites responsible for n-hexane isomerization. Other possible reasons (contribution from alumina acidity and changes in the structure of metal surface) were analyzed and discarded. A mechanistic rationale for the improvement of n-hexane isomerization is outlined.
Author Monika Radlik
Monika Radlik,,
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, Artur Małolepszy (FCPE / DSP)
Artur Małolepszy,,
- Department of Separation Processes
, Krzysztof Matus
Krzysztof Matus,,
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, Anna Śrębowata
Anna Śrębowata,,
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, Wojciech Juszczyk
Wojciech Juszczyk,,
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, Piotr Dłużewski
Piotr Dłużewski,,
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, Zbigniew Karpiński
Zbigniew Karpiński,,
-
Journal seriesCatalysis Communications, ISSN 1566-7367
Issue year2019
Vol123
Pages17-22
Publication size in sheets0.5
Keywords in EnglishPd/Al2O3, n-hexane isomerization, effect of catalyst reduction, Pd0.82Al018, Pd-Al active centers
ASJC Classification1503 Catalysis; 1508 Process Chemistry and Technology; 1600 General Chemistry
DOIDOI:10.1016/j.catcom.2019.02.002
URL https://ac.els-cdn.com/S1566736719300305/1-s2.0-S1566736719300305-main.pdf?_tid=a7ea51d0-6404-4ddd-affa-7e5b72ef9302&acdnat=1552383018_40757ae5f8ee3073d1daf7d7f413c92a
Languageen angielski
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Radlik M. (i in.) - Alkane isomerization on...pdf 506.7 KB
Score (nominal)100
Score sourcejournalList
ScoreMinisterial score = 100.0, 10-06-2020, ArticleFromJournal
Publication indicators WoS Citations = 3; Scopus Citations = 3; Scopus SNIP (Source Normalised Impact per Paper): 2018 = 0.899; WoS Impact Factor: 2018 = 3.674 (2) - 2018=3.517 (5)
Citation count*
Additional fields
UwagiThis work was carried out within Research Project # 2016/21/B/ST4/03686 from the National Science Centre, Poland.
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