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The Influence of Calcination on the Physicochemical Properties of Acidactivated Natural Mordenite

[ Vol. 9 , Issue. 2 ]

Author(s):

Sotiris Lycourghiotis, Dimitra Makarouni, Eleana Kordouli, Kyriakos Bourikas*, Christos Kordulis and Vassilis Dourtoglou*   Pages 138 - 147 ( 10 )

Abstract:


The influence of air–calcination (500oC for 2h) on the physicochemical properties of natural mordenite and mordenite activated by aqueous solutions of several acids, has been studied through various methods. Calcination does not affect the crystal structure of the samples and their fibrous and pores morphology. In contrast, it causes a drastic decrease in the high Bronsted acidity of the acidactivated samples, which was tentatively attributed to the partial destruction of the very strong Al– (OH)–Si acid sites. The influence of calcination on the texture is different depending on the acidic solution used for mordenite activation. The high specific surface area and the moderate acidity obtained after calcination of the sample activated by HCl render this material quite attractive support for the development of nickel supported catalysts for green diesel production.

Keywords:

Natural mordenite, acid-activated mordenite, air-calcination, catalyst support, porosity, surface acidity.

Affiliation:

School of Science and Technology, Hellenic Open University, Tsamadou 13-15, GR-26222, Patras, Department of Chemistry, University of Patras, GR-26504, Patras, Department of Chemistry, University of Patras, GR-26504, Patras, School of Science and Technology, Hellenic Open University, Tsamadou 13-15, GR-26222, Patras, School of Science and Technology, Hellenic Open University, Tsamadou 13-15, GR-26222, Patras, VIORYL, Chemical and Agricultural Industry, Scientific Research S.A., 28th km. Athens-Lamia national road, GR-19014, Afidnes

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