Brønsted acidity of MgO induced by H2S adsorption / L. Oliviero in Industrial & engineering chemistry research, Vol. 48 N°3 (Février 2009)  

Public ISBD [article]  inIndustrial & engineering chemistry research > Vol. 48 N°3 (Février 2009) . - p. 1237–1241 Titre : Brønsted acidity of MgO induced by H2S adsorption Type de document : texte imprimé Auteurs : L. Oliviero, Auteur ; H. Leclerc, Auteur ; O. V. Manoilova, Auteur ; V. Blasin-Aube, Auteur Année de publication : 2009 Article en page(s) : p. 1237–1241 Note générale : Chemical engineering Langues : Anglais (eng) Mots-clés : Brønsted acids Résumé : The effect of H2S upon the acidity of the MgO surface has been investigated using FTIR spectra of adsorbed dimethyl pyridine (2,6-DMP) and CO as test molecules. In the presence of weakly bound H2S, the spectra of 2,6-DMP reveal Brønsted acidity. Adsorption of CO perturbed OH groups from MgO only in the presence of H2S or of aprotic molecules such as CO2 or SO2. This infers that these are the surface OH groups activated by acidic molecules which act as the source of protons. Thus, weak adsorption of acidic compounds, such as H2S, SO2, or CO2, can lead to dramatic enhancement of the acidity of the MgO surface. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie800768a [article] Brønsted acidity of MgO induced by H2S adsorption [texte imprimé] / L. Oliviero, Auteur ; H. Leclerc, Auteur ; O. V. Manoilova, Auteur ; V. Blasin-Aube, Auteur . - 2009 . - p. 1237–1241. Chemical engineering Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 48 N°3 (Février 2009) . - p. 1237–1241 Mots-clés : Brønsted acids Résumé : The effect of H2S upon the acidity of the MgO surface has been investigated using FTIR spectra of adsorbed dimethyl pyridine (2,6-DMP) and CO as test molecules. In the presence of weakly bound H2S, the spectra of 2,6-DMP reveal Brønsted acidity. Adsorption of CO perturbed OH groups from MgO only in the presence of H2S or of aprotic molecules such as CO2 or SO2. This infers that these are the surface OH groups activated by acidic molecules which act as the source of protons. Thus, weak adsorption of acidic compounds, such as H2S, SO2, or CO2, can lead to dramatic enhancement of the acidity of the MgO surface. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie800768a

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