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Poster De Conférence Année : 2016

Catalytic combustion of polycyclic aromatic hydrocarbons (PAH) over zeolite type catalysts : effect of Si/Al ratio, structure and acidity

Résumé

PAHs show adverse health effects. For instance, benzo(a)pyrene is classified as carcinogenic by IARC. Therefore, at the international level, many countries have committed themselves to minimizing air emissions through the Aarhus Protocol on POPs which was signed in 1998 under the Geneva Long Range Transboundary Air Pollution Convention. At the French level, emission limit values for PAHs have been introduced in a recent regulation on combustion plants with a thermal input higher than 20 MWth (Ministerial Decree of 26 August 2013). Catalytic oxidation is one of the most promising technologies to reduce the emissions of air pollutants [1]. Metal oxides or supported noble metals methods are the most investigated catalysts for the destruction of organic pollutants. Acid zeolites (protonic forms) have been considered as effective cheap alternative catalysts to metal oxides for hydrocarbons oxidation [2]. Catalytic performances of these zeolites were associated with the presence of Bronsted acid sites. In this work, the removal of 1-methyl naphthalene (1-MN), a model compound representative of PAH, by catalytic combustion in the presence of steam is investigated. The behavior of various acidic zeolites and Pd exchanged acidic zeolites towards the gas-phase catalytic oxidation of 1-MN is studied. The effect of some parameters on 1-MN oxidation is studied: zeolite structure, Lewis and Bronsted acidity, and Si/Al ratio and Pd loading. The catalytic performance of the zeolitic catalysts is compared to that of reference Pd catalysts supported on SiO2 and Al2O3.
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Dates et versions

hal-01323946 , version 1 (31-05-2016)

Identifiants

  • HAL Id : hal-01323946 , version 1

Citer

J. Soufi, I. Pitault, P. Gelin, V. Meille, L. Vanoye, et al.. Catalytic combustion of polycyclic aromatic hydrocarbons (PAH) over zeolite type catalysts : effect of Si/Al ratio, structure and acidity. French Conference on Catalysis (FCCat), May 2016, Frejus, France. ⟨hal-01323946⟩
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