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- W71380166 abstract "Chromia supported on zirconia is an interesting catalyst system for a wide range of catalytic reactions, with dehydrogenation of lower olefines or dehydrocyclization of C6+ paraffines being examples of reactions of industrial relevance 1. , 2. , 3. . The activity of supported chromia catalysts in these reactions is influenced by the oxidation state of chromium, its coordination as well as by the dispersion and distribution of oxidic chromium species. These properties strongly depend on Cr loading, treatment conditions as well as on the nature of support [4] . Recently, we have found that chromia supported on lanthana modified zirconia is able to catalyze the dehydrocyclization of n-octane with remarkable selectivity to ethylbenzene and o-xylene [5] , i.e. to the two products, which can be expected as a result of a 6 ring closure of a n-C8 intermediate. Side reactions like the formation of further aromatics by alkylation or dealkylation, alkane isomerization or cracking are strongly suppressed. In this paper, we report some results of the characterization of CrOx/La2O3-ZrO2 catalysts by various methods as well as deactivation experiments, in order to get hints on a special nature of the catalysts and on their deactivation as a phenomenon of practical interest." @default.
- W71380166 created "2016-06-24" @default.
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- W71380166 date "2000-01-01" @default.
- W71380166 modified "2023-09-23" @default.
- W71380166 title "Studies on a chromia/lanthana/zirconia aromatization catalyst" @default.
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- W71380166 doi "https://doi.org/10.1016/s0167-2991(00)80821-6" @default.
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