Journal of Thermal Analysis and Calorimetry
Volume/Issue:
Volume 40: Issue 3
Acidity and surface behaviour of alumina-boria catalysts studied by adsorption microcalorimetry of probe molecules
Authors: G. Cucinieri Colorio 1 , A. Auroux 1 , and B. Bonnetot 2
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  • 1 Associé à l'Université Claude Bernad Lyon 1 Institut de Recherces sur la Catlyse, Laboratoire Propre du C.N.R.S. 2 Avenue Albert Einstein 69626 Villeurbanne, Cedex France
  • | 2 Université Claude Bernard Lyon 1 Laboratoire de Physico-Chimie Minerale Boulevard du 11 Novembre 1918 69622 Villeurbanne, Cedex France
Pages:
1267–1276
Online Publication Date:
09 Jan 2007
Publication Date:
01 Oct 1993
Article Category:
Research Article
DOI:
https://doi.org/10.1007/bf02546890
Keywords:
adsorption microcalorimetry; aluminia-boria catalysts; DSC; TG
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Abstract  

Acidity and basicity of alumina-boria catalysts supported on porous or non-porous alumina have been studied by adsorption microcalorimetry of probe molecules (ammonia, pyridine and sulphur dioxide). Despite decreasing in initial heats, the total acidity as determined by ammonia adsorption increased in number and strength as a function of percentage of boron oxide. Ammonia, as a strong base, was shown to cover all types sites from strong to weak acid sites. Pyridine, as a weaker probe, was shown to dose only the stronger sites of the samples which stay nearly constant after B2O3 coverage approaching the monolayer. The basic sites of the amphoteric alumina support are neutralized by 10 wt% of boron oxide on non-porous alumina and 20 wt% of B2O3 on porous alumina. The catalytic activity for partial oxidation of ethane increased with acidity and reached a maximum constant value above 20 wt% of boron oxide.

Cover Journal of Thermal Analysis and Calorimetry
Journal of Thermal Analysis and Calorimetry
Print ISSN:
1388-6150
Online ISSN:
1572-8943

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Journal of Thermal Analysis and Calorimetry
Language English
Size A4
Year of
Foundation		 1969
Volumes
per Year		 1
Issues
per Year		 24
Founder Akadémiai Kiadó
Founder's
Address		 H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
Publisher Akadémiai Kiadó
Springer Nature Switzerland AG
Publisher's
Address		 H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
CH-6330 Cham, Switzerland Gewerbestrasse 11.
Responsible
Publisher		 Chief Executive Officer, Akadémiai Kiadó
ISSN 1388-6150 (Print)
ISSN 1588-2926 (Online)

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