Paper Title:
Characterization of Fluorinated Hβ Zeolite with NH4F
  Abstract

Fluorination of the zeolite has been known as a useful method to modify its acidity and surface performance. In this paper, a set of zeolite Hβ were impregnated with aqueous solution of NH4F. The effects of NH4F impregnation on the structure and acidity of Hβ was investigated by XRD, BET measurements, NH3-TPD, and Py-IR. The change of specific surface area and pore volume of the fluorinated samples with NH4F can be attributed the reaction of NH4F with non-framework and framework aluminum. The fluorination increases the strength and changes the distribution of the acid sites; the fluorination also leads to the decrease of the total acid sites and the Brönsted acid sites due to the dealuminization of the samples and the substitution of the OH- by fluorine atoms.

  Info
Periodical
Advanced Materials Research (Volumes 160-162)
Edited by
Guojun Zhang and Jessica Xu
Pages
524-528
DOI
10.4028/www.scientific.net/AMR.160-162.524
Citation
Z. Tian, N. C. Bing, "Characterization of Fluorinated Hβ Zeolite with NH4F", Advanced Materials Research, Vols. 160-162, pp. 524-528, 2011
Online since
November 2010
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$32.00
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