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Study of silica-supported heteropoly acids by microcalorimetry (1994)

Lefebvre, Frédéric ; Jouguet, Bernadette ; Auroux, Aline

Springer

Reaction kinetics and catalysis letters 53 (1994), S. 297-302

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ISSN: 1588-2837

Source: Springer Online Journal Archives 1860-2000

Topics: Chemistry and Pharmacology

Notes: Abstract Silica-supported heteropoly acids have been studied by microcalorimetry. The results are greatly dependent on both the activation temperature and the heteropoly acid, in agreement with the n-hexane cracking experiments. It is shown that very strong acid sites are formed on H4SiW12O40/SiO2 activated at 623 K and on H3PW12O40/SiO2 activated at 423 K.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1007/BF02073034

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Optimal experimental procedures in a combined TPR/TPO apparatus (1995)

Jouguet, Bernadette ; Gervasini, Antonella ; Auroux, Aline

Weinheim : Wiley-Blackwell

Chemical Engineering & Technology - CET 18 (1995), S. 243-247

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ISSN: 0930-7516

Keywords: Chemistry ; Industrial Chemistry and Chemical Engineering

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology

Notes: The apparatus described allows successive TPR/TPO experiments on the same sample. A calibration method for the reducing or oxidizing gas mixture is described. The best operating conditions for optimal results and sensitivity are discussed. We have studied the application of TPR/TPO to bulk V2O5 and to the redox behaviour of CuII ions on silica-alumina. The procedure resulted in reproducible TPR/TPO profiles.

Additional Material: 7 Ill.