Synthesis of ZnAl₂O₄ Catalytic Support by Combustion Reaction Using Different Fuels

Abstract:

This work shows the influence of the fuels aniline, carbohydrazide and glycine on structural and morphological characteristics of ZnAl₂O₄ synthesized by combustion reaction. Samples were prepared according to the propellants and explosives theory using a vitreous silica crucible and a muffle furnace as heating source. During the synthesis was measured the time and temperature of the reaction. After The samples were structurally and morphologically characterized by the following techniques: XRD, nitrogen adsorption / desorption (BET / BJH), and SEM. The higher temperature was achieved by the synthesis using aniline, whose value was of 876°C. XRD results showed that all the samples presented the ZnAl₂O₄ spinel as majority phase and, ZnO and Al₂O₃ as segregated phases. The samples also showed low surface area, varying of 23.6 to 28.7 m²/g, and particle size of 45 to 55 nm, besides mesoporous characteristic and irregular agglomerates formation.

• Periodical: Materials Science Forum (Volumes 727-728)
• Pages: 1260-1265
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.727-728.1260
• Online since: August 2012
• Authors: Elvia Leal, Bruno Brito Dantas, Laédna Souto Neiva, Ruth Herta Goldsmith Aliaga Kiminami, Ana Cristina Figueiredo de Melo Costa
• Keywords: Aniline, Carbohydrazide, Combustion, Glycine, Zinc Aluminate

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