Showing papers by "Luca Lietti published in 1989"
TL;DR: In this paper, unpromoted and caesium-promoted ZnCrO and MnCrO catalysts have been characterized and tested in the direct synthesis of methanol and hig
43 citations
TL;DR: In this article, the mechanism involved in the synthesis of methanol and higher alcohols from syngas has been investigated by combined FT-IR spectroscopy and TPSR techniques.
29 citations
TL;DR: In this article, the preparation chemistry and phase transitions under N 2, H 2 and air of mixed oxides of Zn, Mn, and Cr are investigated by means of chemical analysis, XRD, IR, DTA-TG, and UV-Vis DR.
1 citations
TL;DR: In this paper, the TPSR method is applied to assess the reactivity of the surface of a mixed Zn-Cr oxide towards linear C 4 aldehyde, alcohol and acid molecules.
Abstract: The TPSR method is applied to assess the reactivity of the surface of a mixed Zn-Cr oxide towards linear C 4 aldehyde, alcohol and acid molecules. The results indicate that molecularly adsorbed aldehyde, C 4 alkoxide and C 4 carboxylate species are formed at the surface together with the corresponding C 8 intermediates originating from the aldol-like condensation of two aldehyde molecules. The functions of the surface of the mixed Zn-Cr oxide involved in the desorption upon decomposition or reaction of the above intermediates have been identified, including aldol-like condensation, hydrogenation, dehydrogenation, dehydration, decarboxylation and double bond isomerization.