Abstract
The catalytic behaviour of Zn/Cr mixed oxides with different compositions was investigated as a function of the bulk and surface properties. It was observed that non-stoichiometric spinel-type phases were stable also in the reaction conditions, in which zinc-surface enrichment did not occur. The maximum productivity in methanol was observed for monophasic non-stoichiometric spinel-type samples with a Zn/Cr ratio near to one, whereas the samples richest in zinc, for which a side phase, ZnO also was detected, showed a strong decrease in activity. The catalytic data support the hypothesis that non-stoichiometric spinel is the active phase for the synthesis of methanol on coprecipitated Zn-Cr catalysts.
Similar content being viewed by others
References
G. Natta, in:Catalysis, ed. P.H. Emmet, Vol. III (Reinhold, New York, 1953) chap. 8.
G. Natta and P. Corradini, in:Proc. Int. Symp. React. Solids, ed. E. Hemlin, Chalmers University, Gothenburg, 1954, p. 619.
J.E. Germain, J. Bigourd, J.P. Beaufils, B. Gras and L. Ponsolle, Bull. Soc. Chim. Fr. (1961) 1777.
M. Kraus, Z. Zitny, D. Mihajlova and A.A. Andreev, Collect. Czech. Chem. Commun. 41 (1971) 3563.
Y. Ogino, M. Oba and H. Uchida, Bull. Chem. Soc. Jpn. 32 (1959) 284.
Y. Ogino, M. Oba and H. Uchida, Bull. Chem. Soc. Jpn. 32 (1959) 616.
G. Natta, U. Colombo and I. Pasquon, in:Catalysis, ed. P.H. Emmet, Vol. 5 (Reinhold, New York, 1957) chap. 3.
A. Riva, F. Trifiro', A. Vaccari, G. Busca, L. Mintchev, D. Sanfilippo and W. Manzatti, J. Chem. Soc., Faraday Trans. 83 (1987) 2213.
P.E. Hojlund Nielsen, Nature 267 (1977) 822.
N. Von Laqua, S. Dudda and B. Revtlec, Z. Anorg. Allg. Chem. 428 (1977) 151.
G. Del Piero, F. Trifiro' and A. Vaccari, J. Chem. Soc., Chem. Commun. (1984) 656.
M. Di Conca, A. Riva, F. Trifiro', A. Vaccari, G. Del Piero, V. Fattore and F. Pincolini, in:Proc. 8th Int. Congr. Catal., DECHEMA, Frankfurt a. M., 1984, vol. II, p. 173.
M. Bertoldi, B. Fubini, E. Giamello, G. Busca, F. Trifiro' and A. Vaccari, J. Chem. Soc., Faraday Trans. 1 84 (1988) 1405.
G. Del Piero, M. Di Conca, F. Trifiro' and A. Vaccari, in:Reactivity of Solids, eds. P. Barret and L.C. Dofour (Elsevier, Amsterdam, 1985) p. 1029.
E. Giamello, B. Fubini, M. Bertoldi, G. Busca and A. Vaccari, J. Chem. Soc., Faraday Trans. 1 85 (1989) 237.
B. Fubini, E. Giamello, F. Trifiro' and A. Vaccari, Thermochim. Acta 133 (1988) 155.
G. Busca and A. Vaccari, J. Catal. 108 (1988) 481.
A. Riva, F. Trifiro', A. Vaccari, L. Mintchev and G. Busca, J. Chem. Soc., Faraday Trans, 1 84 (1988) 1423.
H.P. Klug and L.E. Alexander,X-Ray Diffraction Procedures (Wiley, New York, 1974) p. 531.
A. Miller, J. Appl. Phys. Suppl. 30 (1959) 245.
R.D. Shannon and C.T. Prewitt, Acta Crystallogr. B24 (1970) 1076.
G. Wrobel, J. Arsene, M. Lenglet, A. D'Huysser and J.P. Bonnelle, Mater. Chem. 6 (1981) 19.
L. Jalowiecki, G. Wrobel, M. Daage and J.P. Bonnelle, J. Catal. 107 (1987) 375.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Errani, E., Trifiro, F., Vaccari, A. et al. Structure and reactivity of Zn-Cr mixed oxides. Role of non-stoichiometry in the catalytic synthesis of methanol. Catal Lett 3, 65–72 (1989). https://doi.org/10.1007/BF00765056
Received:
Accepted:
Issue Date:
DOI: https://doi.org/10.1007/BF00765056