Navegar

Colección

Datos Estadísticas

Artículo

Estamos trabajando para incorporar este artículo al repositorio
Consulte el artículo en la página del editor
Consulte la política de Acceso Abierto del editor

Abstract:

The activity and structure-sensitivity of the water-gas shift (WGS) reaction over Cu{single bond}Zn{single bond}Al mixed oxide catalysts were studied. Three sets of samples with different Cu/Zn and (Cu+Zn)/Al atomic ratios were prepared by coprecipitation. Depending on the cation ratio, the ternary hydroxycarbonate precursors contained hydrotalcite, aurichalcite and/or rosasite phases. The decomposed precursors contained CuO, ZnO, ZnAl2O4, and Al2O3. The relative proportion of these phases depended on both the chemical composition of the sample and the calcination temperature employed for decomposing the precursor. After activation with hydrogen, samples were tested for the WGS reaction at 503 K. The turnover frequency of the eighteen samples tested was essentially the same (0.2-0.3 s-1) irrespective of changing the copper metal surface area between 3 and 35 m2/g Cu and the metallic copper dispersion between 0.5 and 5.0%. This indicated that the WGS reaction is a structure-insensitive reaction, as the specific reaction rate r0 (mol CO/h/g Cu) is always proportional to the copper metal surface area. Preparation of mixed oxides with a high copper dispersion is therefore required for obtaining more active catalysts. It was found that the value of the metallic copper dispersion is related to the amount of hydrotalcite contained in the hydroxycarbonate precursor: the higher the hydrotalcite content in the precursor, the higher the copper metal dispersion in the resulting catalyst and, as a consequence, the higher the catalyst activity. Ternary Cu/ZnO/Al2O3 catalysts exhibited a substantially faster WGS activity than binary Cu/ZnO catalysts. The addition of aluminium, although inactive for the WGS reaction, is required for improving the catalyst performance. © 1995 Elsevier Science B.V. All rights reserved.

Registro:

Documento: Artículo
Título:Activity and structure-sensitivity of the water-gas shift reaction over Cu{single bond}Zn{single bond}Al mixed oxide catalysts
Autor:Ginés, M.J.L.; Amadeo, N.; Laborde, M.; Apesteguía, C.R.
Filiación:Instituto de Investigaciones en Catálisis y Petroquímica (INCAPE), UNL-CONICET Santiago del Estero 2654, 3000 Santa Fe, Argentina
PINMATE, Chemical Engineering Department, Universidad de Buenos Aires Ciudad Universitaria, 1428 Buenos Aires, Argentina
Palabras clave:Copper oxide/zinc oxide/alumina; Structure-sensitivity; Water-gas shift reaction
Año:1995
Volumen:131
Número:2
Página de inicio:283
Página de fin:296
DOI: http://dx.doi.org/10.1016/0926-860X(95)00146-8
Título revista:Applied Catalysis A, General
Título revista abreviado:Appl. Catal. A Gen.
ISSN:0926860X
CODEN:ACAGE
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_0926860X_v131_n2_p283_Gines

Referencias:

  • Newsome, (1980) Catal. Rev. Sci. Eng., 21, p. 275
  • Hawker, (1982) Hydroc. Process., 61, p. 183
  • Grenoble, Estadt, Ollis, (1981) J. Catal., 67, p. 90
  • Campbell, Daube, (1987) J. Catal., 104, p. 109
  • Petrini, Garbassi, (1984) J. Catal., 90, p. 113
  • van Herwijnen, de Jong, (1980) J. Catal., 63, p. 83
  • Salmi, Hakkarainer, (1989) Appl. Catal., 49, p. 285
  • Takagua, Pleizer, Amenomiya, Methanol synthesis from CO2+H2 I. characterization of catalysts by TPD (1985) Applied Catalysis, 18, p. 285
  • Hadden, Vandervell, Waugh, Webb, (1988) Proc. 9th Int. Cong. Catal., Calgary, 1988, 4, pp. 1835-1841. , 2nd edition, M.J. Phillips, M. Ternan, The Chemical Institute of Canada, Ottawa
  • Fujita, Usui, Takezawa, (1992) J. Catal., 134, p. 220
  • Ovesen, Stoltze, Norksov, Campbell, (1992) J. Catal., 134, p. 445
  • Lloyd, Ridler, Twigg, (1989) Catalyst Handbook, p. 283. , M.V. Twigg, 2nd edition, Wolfe, London
  • Kuijpers, Tjepkema, van der Wal, (1986) Appl. Catal., 25, p. 139
  • Nakamura, Campbell, Campbell, (1990) J. Chem. Soc. Faraday Trans., 86, p. 2725
  • Chinchen, Spencer, (1991) Catal. Today, 10, p. 293
  • Boudart, (1969) Adv. Catal., 20, p. 153
  • Marchi, Di Cosimo, Apesteguía, (1992) Catal. Today, 15, p. 383
  • Chinchen, Hay, Vandervell, Waugh, (1987) J. Catal., 103, p. 79
  • Young, Clark, (1973) Chem. Eng. Prog., 69 (5), p. 69
  • M.J.L. Ginés and C.R. Apesteguía, Latinam. Appl. Res., in press; Shishkov, Kassabova, Petkov, (1983) Stud. Surf. Sci. Catal., 16, p. 757
  • Kington, Holmes, (1953) Trans. Faraday Soc., 49, p. 417
  • Parris, Klier, (1986) J. Catal., 97, p. 374
  • Habraken, Bootsma, (1979) Surf. Sci., 87, p. 333
  • van Pruissen, Dings, Gijzeman, Surface and subsurface oxygen on Cu(111), Cu(111)-Fe and Cu(110) and their influence on the reduction with CO and H2 (1987) Surface Science, 179, p. 337
  • Chinchen, Spencer, Waugh, Whan, (1987) J. Chem. Soc. Faraday Trans. 1, 83, p. 2193
  • Gherardi, Ruggeri, Trifirò, Vaccari, Del Piero, Manara, Notari, Preparation of Cu-Zn-Al Mixed Hydroxycarbonates Precursors of Catalysts for the Synthesis of Methanol at Low Pressure (1983) Stud. Surf. Sci. Catal., 16, p. 723
  • Miyata, (1975) Clays Clay Miner., 23, p. 369
  • Marchi, Di Cosimo, Apesteguía, (1986) Proc. 4th Int. Symp. on Scientific Bases for the Preparation of Catalysts, , Louvain-la-Neuve, Belgium, Pap. H-7
  • Cavani, Trifirò, Vaccri, (1991) Catal. Today, 11, p. 173
  • Vedage, Pitchai, Herman, Klier, (1984) Proc. 8th International Congress on Catalysis, Berlin, 1984, 2, p. 47. , Verlag Chemie, Weinheim
  • Yurieva, Minyukova, (1985) React. Kinet. Catal. Lett., 29, p. 55
  • Fujitani, Saito, Kanai, Watanabe, Nakamura, Uchijima, Effect of Support on Methanol Synthesis over Cu Catalyst. (1994) Chemistry Letters, p. 1877
  • Pepe, Polini, Stoppa, (1992) Catal. Lett., 14, p. 15
  • Reichle, Yang, Everhardt, (1986) J. Catal., 101, p. 352
  • Nunan, Himelfarb, Herman, Klier, Bogdan, Simmons, (1989) Inorg. Chem., 28, p. 3868
  • Rey, Fornés, Rojo, (1992) J. Chem. Soc. Faraday Trans., 88, p. 2233

Citas:

---------- APA ----------
Ginés, M.J.L., Amadeo, N., Laborde, M. & Apesteguía, C.R. (1995) . Activity and structure-sensitivity of the water-gas shift reaction over Cu{single bond}Zn{single bond}Al mixed oxide catalysts. Applied Catalysis A, General, 131(2), 283-296.
http://dx.doi.org/10.1016/0926-860X(95)00146-8
---------- CHICAGO ----------
Ginés, M.J.L., Amadeo, N., Laborde, M., Apesteguía, C.R. "Activity and structure-sensitivity of the water-gas shift reaction over Cu{single bond}Zn{single bond}Al mixed oxide catalysts" . Applied Catalysis A, General 131, no. 2 (1995) : 283-296.
http://dx.doi.org/10.1016/0926-860X(95)00146-8
---------- MLA ----------
Ginés, M.J.L., Amadeo, N., Laborde, M., Apesteguía, C.R. "Activity and structure-sensitivity of the water-gas shift reaction over Cu{single bond}Zn{single bond}Al mixed oxide catalysts" . Applied Catalysis A, General, vol. 131, no. 2, 1995, pp. 283-296.
http://dx.doi.org/10.1016/0926-860X(95)00146-8
---------- VANCOUVER ----------
Ginés, M.J.L., Amadeo, N., Laborde, M., Apesteguía, C.R. Activity and structure-sensitivity of the water-gas shift reaction over Cu{single bond}Zn{single bond}Al mixed oxide catalysts. Appl. Catal. A Gen. 1995;131(2):283-296.
http://dx.doi.org/10.1016/0926-860X(95)00146-8