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Surface structure of alkysilylated hzsm-5 as phase-boundary catalyst

Nur, Hadi and Hau, Ng Yun and Mohd. Muhid, Mohd. Nazlan and Hamdan, Halimaton (2004) Surface structure of alkysilylated hzsm-5 as phase-boundary catalyst. Physics Journal of The Indonesian Physical Society, A7 (218). pp. 1-5. ISSN 1410-8860

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Abstract

The need for cleaner environment concerns motivates the development of more e�cient catalytic system. Based on this consideration, recently a novel catalyst named "Phase-boundary catalyst", a bimodal amphiphilic solid catalyst, was proposed. It was demonstrated that the catalytic system containing phase-boundary catalyst required neither stirring to make an emulsion nor addition of a co-solvent to make a homogeneous solution to drive the reaction. The driving force that has prompted this paper is to investigate the surface structure of alkylsilylated HZSM-5 as phase-boundary catalyst. Temperature Programmed Desorption (TPD) of ammonia and, 13C and 29Si MAS NMR spectroscopy were used to elucidate the surface structure of alkylsilylated HZSM-5. It is suggested the addition of small amount of water to the solid particles before alkylsilylation, as a recipe to make a bimodal amphiphilic particles, is desired to enhance the acidity of HZSM-5. The enhancement of acidity might be induced by polymeric octadecylsiloxane as elucidated by 13C and 29Si MAS NMR spectroscopy.

Item Type:Article
Uncontrolled Keywords:HZSM-5; polymeric octadecylsiloxane; phase-boundary catalyst
Subjects:Q Science > QC Physics
Q Science > QD Chemistry
Divisions:Others
ID Code:28189
Deposited By: Nurul Asilah Mahmood
Deposited On:18 Sep 2012 06:11
Last Modified:02 Oct 2012 06:30

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