Catalysis Database

Preparation of catalytically active γ-Al2O3 from a basic aluminium succinate precursor precipitated from homogeneous solution

Ch, Sivaraj and B, Prabhakara Reddy and B, Rama Rao and P, Kanta Rao (1986) Preparation of catalytically active γ-Al2O3 from a basic aluminium succinate precursor precipitated from homogeneous solution. Applied Catalysis , 24 (1-2). pp. 25-35.

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Official URL: http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6W80-43N2B0R-4D&_user=518931&_coverDate=07%2F15%2F1986&_alid=606585597&_rdoc=46&_fmt=full&_orig=search&_cdi=6640&_sort=d&_docanchor=&view=c&_ct=55&_acct=C000025838&_version=1&_urlVersion=0&_userid=

Abstract

A rapid method for making γ-alumina is described. Basic aluminium succinate and bayerite, precursors of γ-alumina, were prepared by precipitation from homogeneous solutions of aluminium chloride with and without succinic acid by urea hydrolysis at 90–95°C. The identification of basic aluminium succinate was confirmed by its infrared (IR) and nuclear magnetic resonance (NMR) spectra. The effect of the calcination temperature on the crystallographic phase, crystallite size, surface area, pore volume, mean pore radius and the acid strength distribution of these aluminas was investigated. Well crystallized γ-alumina could be obtained by calcining basic aluminium succinate at 870°C for 5 h, whereas bayerite under similar conditions yielded θ-alumina. Active aluminas prepared from basic aluminium succinate have comparatively higher surface areas than those made from bayerite. Scanning electron microscope (SEM) studies of γ-alumina made from basic aluminium succinate show that the particles are microspheroidal in shape. The activity of these aluminas for dehydration of ethanol was comparable to that of commercial alumina.

Item Type:Article
Subjects:Science > Chemistry
ID Code:1030
Deposited By:Prof Balasubramanian Viswanathan
Deposited On:07 Aug 2007 08:16
Last Modified:07 Aug 2007 08:16

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