Determination of Lewis and Brönsted acid sites by gas flow-injection technique

Musthofa, Malik and Karim, Ainul Hakimah and Ahmad Fadzlillaah, Nurrulhidayah and Annuar, Nur Hazirah Rozali and Jalil, Aishah Abdul and Triwahyono, Sugeng (2010) Determination of Lewis and Brönsted acid sites by gas flow-injection technique. Malaysian Journal of Fundamental and Applied Sciences, 6 (2). pp. 127-131. ISSN 2289-5981 E-ISSN 2289-599X

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Abstract

Gas flow-injection technique pyridine-FTIR was studied for determination of Lewis and Brönsted acid sites on the solid super acid catalysts. The system consists of stainless steel gas cell which can be heated up to 623 K, CaF2 windows, pyridine injection port and double liquid nitrogen trap for removal of moisture. Pure nitrogen gas and pyridine were used as a carrier and probe molecule. Pyridine was injected to the sysem at 423 K followed by flushing of N2 gas through double liquid nitrogen trap at 423 for 1 h and at 573 K for 30 min. All spectra were recorded at room temperature. This technique gave similar results to those of taken by vacuum system for HZSM-5, Pt/SO4 2--ZrO2, Al2O3 catalysts.

Item Type:	Article (Journal)
Additional Information:	7619/71289
Uncontrolled Keywords:	Gas flow technique; Pyridine; Lewis acid sites; Brönsted acid sites; HZSM-5; Pt/SO4 2--ZrO2; Al2O3;
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:	21 Feb 2020 09:14
Last Modified:	21 Feb 2020 09:14
URI:	http://irep.iium.edu.my/id/eprint/71289

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