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FT-IR study of N2 adsorption on ZnO and HgO modified Na-Y zeolite adsorbents

Chieng, Y. Y. and Kamarudin, Khairul Sozana Nor and Hamdan, Halimaton and Mat, Hanapi (2005) FT-IR study of N2 adsorption on ZnO and HgO modified Na-Y zeolite adsorbents. In: 2nd International Conference on Chemical and Bioprocess Engineering in conjunction with 19th Symposium of Malaysian Chemical Engineers (SOMChE 2005), 8-10 December 2005, Kota Kinabalu, Sabah.

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Abstract

FT-IR was used to study in situ gas-zeolite surface interactions and adsorbed species formed on ZnO and HgO modified Na-Y zeolites under ambient temperature (298 K). A general correlation between the integrated absorption band areas and the positions of v(N-N) bands interacting with the active adsorption sites on modified Na-Y zeolites are discussed. Results clearly demonstrate that the FT-IR bands of N2 adsorbed on ZnO and HgO modified Na-Y zeolite was governed not only by the properties of adsorbate but also by the nature and strength of the active adsorption sites present on the zeolite surfaces. In general, blue-shifted v(N-N) bands are obtained relative to the gas-phase Raman frequency, which are due to the different adsorption behavior of these adsorbed molecules with end-on orientation on the active adsorption sites. In addition, the adsorbing molecules interact strongly with the surface at initial stage. The strength of these interactions will then decrease as adsorption active sites are fully occupied.

Item Type:Conference or Workshop Item (Paper)
Uncontrolled Keywords:Adsorption, FT-IR, HgO modified Na-Y zeolite, nitrogen, ZnO
Subjects:T Technology > T Technology (General)
Divisions:Chemical and Natural Resources Engineering (Formerly known)
ID Code:5397
Deposited By: Norhani Jusoh
Deposited On:05 Apr 2008 04:58
Last Modified:01 Jun 2010 15:30

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