Reformage catalytique à la vapeur des hydrocarbures aromatiques lourds. II: Conversion de différentes molécules bicycliques. Comparaison avec le vaporeformage du méthyl-1-naphtalène - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Bulletin de la Societe Chimique de France Année : 1985

Catalytic steam reforming of heavy aromatic hydrocarbons. II: Study of the conversion of selected bicyclic molecules. Comparison with the steam reforming of methyl-1-naphtalene

Reformage catalytique à la vapeur des hydrocarbures aromatiques lourds. II: Conversion de différentes molécules bicycliques. Comparaison avec le vaporeformage du méthyl-1-naphtalène

Résumé

Steam and H conversions of selected arom. hydrocarbons Tetralin, naphthalene, 2-methylnaphthalene were performed at 440°C and compared to the steam reforming of 1-methylnaphthalene (part I of this study). The selective ring opening of naphthalene and alkylnaphthalenes (yielding C4H6 and PhMe) is likely to occur via direct splitting of C-C bonds in the arom. nucleus. Hydrogenated forms, such as Tetralin or Decalin, are not required as intermediates in ring opening. Hydrogenolysis is faster than steam reforming on Rh whereas H and steam conversions occur at the same rate on Ni. Some significant differences in the activation steps of H and steam on Rh and Ni provide a reasonable explanation of these results. In the steam reforming of 1-methylnaphthalene, acidic supports induce considerable isomerization of 1-Me into 2-methylnaphthalene and increased selectivity to PhMe. Yet, the C6H4 in PhMe ratio is not linked to the activity in isomerization: on low acidic catalysts, the steam reforming of methylnaphthalene results in the same selectivities as the of 1-methylnaphthalene.

Domaines

Catalyse
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Dates et versions

hal-00179672 , version 1 (16-10-2007)

Identifiants

  • HAL Id : hal-00179672 , version 1

Citer

Gerard Delahay, Daniel Duprez. Reformage catalytique à la vapeur des hydrocarbures aromatiques lourds. II: Conversion de différentes molécules bicycliques. Comparaison avec le vaporeformage du méthyl-1-naphtalène. Bulletin de la Societe Chimique de France, 1985, 6, pp.1245-1249. ⟨hal-00179672⟩

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