C5-C7 linear alkane hydroisomerization over MoO 3-ZrO2 and Pt/MoO3-ZrO2 catalysts

S. Triwahyono, A. A. Jalil, N. N. Ruslan, H. D. Setiabudi, Kamarudin Nur Hidayatul Nazirah

Research output: Contribution to journalArticle

31 Citations (Scopus)

Abstract

The catalytic activity of MoO3-ZrO2 and Pt/MoO 3-ZrO2 has been assessed based on the C5-C 7 linear alkane hydroisomerization in a microcatalytic pulse reactor at 323-623 K. The introduction of Pt altered the crystallinity and acidity of MoO3-ZrO2. The catalytic activity of Pt/MoO 3-ZrO2 was inferior than that of MoO3-ZrO 2, although the Pt/MoO3-ZrO2 performed higher hydrogen uptake capacity. IR and ESR studies confirmed the heating of MoO 3-ZrO2 in the presence of hydrogen formed active protonic acid sites and electrons which led to change in the Mo oxidation state. Similar phenomenon was observed for Pt/MoO3-ZrO2 at ≤323 K. Contrarily, heating of Pt/MoO3-ZrO2 in the presence of hydrogen at higher temperature did not form protonic acid sites but intensified Lewis acidic sites. It is suggested that Pt facilitates in the interaction of spiltover hydrogen atom and MoO3 to form MoO2 or Mo 2O5 over ZrO2 support which may be intensified the Lewis acidic sites.

Original languageEnglish
Pages (from-to)50-59
Number of pages10
JournalJournal of Catalysis
Volume303
DOIs
Publication statusPublished - Jul 2013
Externally publishedYes

Fingerprint

Alkanes
Paraffins
alkanes
catalysts
Hydrogen
Catalysts
catalytic activity
hydrogen
Catalyst activity
acids
heating
Heating
acidity
Acids
crystallinity
hydrogen atoms
reactors
Acidity
Paramagnetic resonance
oxidation

Keywords

  • C-C alkane isomerization
  • Lewis acid sites
  • MoO-ZrO
  • Protonic acid sites
  • Pt/MoO-ZrO

ASJC Scopus subject areas

  • Catalysis
  • Physical and Theoretical Chemistry

Cite this

C5-C7 linear alkane hydroisomerization over MoO 3-ZrO2 and Pt/MoO3-ZrO2 catalysts. / Triwahyono, S.; Jalil, A. A.; Ruslan, N. N.; Setiabudi, H. D.; Nur Hidayatul Nazirah, Kamarudin.

In: Journal of Catalysis, Vol. 303, 07.2013, p. 50-59.

Research output: Contribution to journalArticle

Triwahyono, S. ; Jalil, A. A. ; Ruslan, N. N. ; Setiabudi, H. D. ; Nur Hidayatul Nazirah, Kamarudin. / C5-C7 linear alkane hydroisomerization over MoO 3-ZrO2 and Pt/MoO3-ZrO2 catalysts. In: Journal of Catalysis. 2013 ; Vol. 303. pp. 50-59.
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AU - Ruslan, N. N.

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N2 - The catalytic activity of MoO3-ZrO2 and Pt/MoO 3-ZrO2 has been assessed based on the C5-C 7 linear alkane hydroisomerization in a microcatalytic pulse reactor at 323-623 K. The introduction of Pt altered the crystallinity and acidity of MoO3-ZrO2. The catalytic activity of Pt/MoO 3-ZrO2 was inferior than that of MoO3-ZrO 2, although the Pt/MoO3-ZrO2 performed higher hydrogen uptake capacity. IR and ESR studies confirmed the heating of MoO 3-ZrO2 in the presence of hydrogen formed active protonic acid sites and electrons which led to change in the Mo oxidation state. Similar phenomenon was observed for Pt/MoO3-ZrO2 at ≤323 K. Contrarily, heating of Pt/MoO3-ZrO2 in the presence of hydrogen at higher temperature did not form protonic acid sites but intensified Lewis acidic sites. It is suggested that Pt facilitates in the interaction of spiltover hydrogen atom and MoO3 to form MoO2 or Mo 2O5 over ZrO2 support which may be intensified the Lewis acidic sites.

AB - The catalytic activity of MoO3-ZrO2 and Pt/MoO 3-ZrO2 has been assessed based on the C5-C 7 linear alkane hydroisomerization in a microcatalytic pulse reactor at 323-623 K. The introduction of Pt altered the crystallinity and acidity of MoO3-ZrO2. The catalytic activity of Pt/MoO 3-ZrO2 was inferior than that of MoO3-ZrO 2, although the Pt/MoO3-ZrO2 performed higher hydrogen uptake capacity. IR and ESR studies confirmed the heating of MoO 3-ZrO2 in the presence of hydrogen formed active protonic acid sites and electrons which led to change in the Mo oxidation state. Similar phenomenon was observed for Pt/MoO3-ZrO2 at ≤323 K. Contrarily, heating of Pt/MoO3-ZrO2 in the presence of hydrogen at higher temperature did not form protonic acid sites but intensified Lewis acidic sites. It is suggested that Pt facilitates in the interaction of spiltover hydrogen atom and MoO3 to form MoO2 or Mo 2O5 over ZrO2 support which may be intensified the Lewis acidic sites.

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