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
AbstractHighly 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.
|Journal series||Catalysis Communications, ISSN 1566-7367|
|Publication size in sheets||0.5|
|Keywords in English||Pd/Al2O3, n-hexane isomerization, effect of catalyst reduction, Pd0.82Al018, Pd-Al active centers|
|ASJC Classification||; ;|
|Score||= 100.0, 10-06-2020, ArticleFromJournal|
|Publication indicators||= 3; = 3; : 2018 = 0.899; : 2018 = 3.674 (2) - 2018=3.517 (5)|
|Uwagi||This work was carried out within Research Project # 2016/21/B/ST4/03686 from the National Science Centre, Poland.|
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