Coupling conversion of methanol and C4 hydrocarbon to propylene on la-modified HZSM-5 zeolite catalysts / Ting Gong in Industrial & engineering chemistry research, Vol. 51 N° 42 (Octobre 2012)  

Public ISBD [article]  inIndustrial & engineering chemistry research > Vol. 51 N° 42 (Octobre 2012) . - pp. 13589-13598 Titre : Coupling conversion of methanol and C4 hydrocarbon to propylene on la-modified HZSM-5 zeolite catalysts Type de document : texte imprimé Auteurs : Ting Gong, Auteur ; Xin Zhang, Auteur ; Ting Bai, Auteur Année de publication : 2012 Article en page(s) : pp. 13589-13598 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Catalyst Zeolite Résumé : The coupling conversion of methanol and C4 hydrocarbon (62.2 wt % of n-butanes and 34.4 wt % of n-butylenes) to propylene was studied over La-modified HZSM-5 (La/HZSM-5) catalysts. Compared with the individual methanol to olefins and C4 hydrocarbon cracking to propylene, the coupling conversion remarkably improved propylene yield and the catalytic stability of La/HZSM-5. In the coupling conversion, propylene yield was strongly dependent on the reaction conditions and the loading of La. The interaction of La with hydroxyl groups (OH) adsorbed on HZSM-5 surface occurred. Such interaction modified the density and distribution of acid sites from the hydroxyl groups. Propylene yield was close relative to the density and distribution of acid sites. The comparatively high propylene yield of ca. 46.0 wt % was obtained on La/HZSM-5 catalyst with 1.5 wt % load of La (1.5 wt % La/HZSM-5), possibly due to the moderate density and distribution of acid sites on the catalyst. ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=26508182 [article] Coupling conversion of methanol and C4 hydrocarbon to propylene on la-modified HZSM-5 zeolite catalysts [texte imprimé] / Ting Gong, Auteur ; Xin Zhang, Auteur ; Ting Bai, Auteur . - 2012 . - pp. 13589-13598. Industrial chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 51 N° 42 (Octobre 2012) . - pp. 13589-13598 Mots-clés : Catalyst Zeolite Résumé : The coupling conversion of methanol and C4 hydrocarbon (62.2 wt % of n-butanes and 34.4 wt % of n-butylenes) to propylene was studied over La-modified HZSM-5 (La/HZSM-5) catalysts. Compared with the individual methanol to olefins and C4 hydrocarbon cracking to propylene, the coupling conversion remarkably improved propylene yield and the catalytic stability of La/HZSM-5. In the coupling conversion, propylene yield was strongly dependent on the reaction conditions and the loading of La. The interaction of La with hydroxyl groups (OH) adsorbed on HZSM-5 surface occurred. Such interaction modified the density and distribution of acid sites from the hydroxyl groups. Propylene yield was close relative to the density and distribution of acid sites. The comparatively high propylene yield of ca. 46.0 wt % was obtained on La/HZSM-5 catalyst with 1.5 wt % load of La (1.5 wt % La/HZSM-5), possibly due to the moderate density and distribution of acid sites on the catalyst. ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=26508182

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