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Catalysts 2016, 6(5), 73; doi:10.3390/catal6050073

Adsorption and Oxidation Investigations over Pt/Al2O3 Catalyst: A Microcalorimetric Study

1
Chemical Reaction Engineering and Competence Centre for Catalysis, Chalmers University of Technology, Göteborg SE-412 96, Sweden
2
Department of Petroleum Processing Engineering and Environmental Protection, Petroleum-Gas University of Ploiesti, 39 Bucuresti Blvd., Ploiesti 100680, Romania
*
Author to whom correspondence should be addressed.
Academic Editors: Jae-Soon Choi and Petr Kočí
Received: 11 February 2016 / Revised: 27 April 2016 / Accepted: 5 May 2016 / Published: 17 May 2016
(This article belongs to the Special Issue Automotive Emission Control Catalysts)
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Abstract

The differential adsorption heats of oxygen and NO, as well as catalytic oxidation behavior during NO oxidation and NO2 dissociation reactions over supported Pt-catalysts, were investigated by microcalorimetric measurements. The average heat of adsorption (∆H) of oxygen ranged from 310 kJ/mol at 200 °C to 289 kJ/mol at 400 °C. Over this temperature range formation of platinum oxides and coverage dependence caused variations in the apparent heat of adsorption. NO heat of adsorption from 50 to 150 °C was near constant with an average value of 202 kJ/mol over the temperature range. View Full-Text
Keywords: microcalorimetry; adsorption heat; Pt/Al2O3; NO; NO2 oxidation; Pt dispersion microcalorimetry; adsorption heat; Pt/Al2O3; NO; NO2 oxidation; Pt dispersion
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Mihai, O.; Creaser, D.; Olsson, L. Adsorption and Oxidation Investigations over Pt/Al2O3 Catalyst: A Microcalorimetric Study. Catalysts 2016, 6, 73.

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