IR study of active sites for n-heptane isomerization over MoO3-ZrO2

Ruslan, Nurun Najwa and Ahmad Fadzillah, Nurrulhidayah and Karim, Ainul Hakimah and Jalil, Aishah Abdul and Triwahyono, Sugeng (2011) IR study of active sites for n-heptane isomerization over MoO3-ZrO2. Applied Catalysis A: General, 406 (1-2). pp. 102-112. ISSN 0926-860X

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Abstract

The property of acidic sites onMoO3-ZrO2 was studied for n-heptane isomerization.A2,6-lutidine IRstudy showed that the introduction of MoO3 on ZrO2 partially eliminated the absorbance band at 1605 cm−1 ascribed to Lewis acid sites corresponding to the presence of the monoclinic phase of ZrO2 and developed several Brönsted and Lewis acid sites with different acidic strengths. MoO3-ZrO2 possesses a large number of relatively weak Lewis and Brönsted acid sites as well as strong acid sites. The active protonic acid sites in n-heptane isomerization were formed from molecular hydrogen through a spillover mechanism with the involvement of doublet bands at 1595 and 1580 cm−1 ascribed to the Lewis acid sites corresponding to the presence of the tetragonal phase of ZrO2. No catalytic activity of MoO3-ZrO2 for n-heptane isomerization was observed in the absence of the doublet bands at 1595 and 1580 cm−1 and hydrogen in the gas phase

Item Type:	Article (Journal)
Additional Information:	7619/71284
Uncontrolled Keywords:	MoO3-ZrO2, Lewis acid sites, Protonic (Brönsted) acid sites, Monoclinic ZrO2, Tetragonal ZrO2
Subjects:	Q Science > QD Chemistry
Kulliyyahs/Centres/Divisions/Institutes (Can select more than one option. Press CONTROL button):	International Institute for Halal Research and Training (INHART)
Depositing User:	Dr Nurrulhidayah Ahmad Fadzillah
Date Deposited:	18 Feb 2020 09:52
Last Modified:	11 Aug 2020 11:27
URI:	http://irep.iium.edu.my/id/eprint/71284

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