Propane dehydrogenation on chromia/zirconia catalysts

Alkane dehydrogenation over supported chromium oxide catalysts

“…In this respect, zirconia has some advantages over alumina, because of its high thermal stability and low surface acidity. Indeed, De Rossi et al [44,45] have found even higher dehydrogenation activities for Cr/ZrO 2 catalysts.…”

Surface Chemistry and Spectroscopy of Chromium in Inorganic Oxides

“…168 Recently, the group of Indovina has studied the activity of Cr/ZrO 2 catalysts in the dehydrogenation of propane. 15 They have shown that mononuclear Cr 3+ species are the active centers, whereas surface oxygens adjacent to this Cr 3+ ion are most probably involved in the dehydrogenation site.…”

“…The catalytic dehydrogenation of light alkanes is especially of great industrial importance because it represents a route to obtain alkenes from feedstocks of low-cost saturated hydrocarbons. 15 The catalytic performances of Cr/Al 2 O 3 catalysts in alkane dehydrogenation was discovered by Frey and Huppke in 1933 [165][166] and is generally known as the Houdry catalyst. 167 This catalyst catalyzes the conversion of e.g.…”

“…Other important catalytic activities are hydrogenation-dehydrogenation, oxidation, isomerization, aromatization, and DeNO x reactions. [14][15][16][17][18][19][20][21][22][23][24][25][26][27][28] The basis for the activity of Cr in such a wide spectrum of reactions lies in the variability of oxidation states, of coordination envi-ronments, and of degree of polymerization of Cr oxide species. This variability is especially pronounced on the surface.…”

Catalysis by Supported Metal Oxides

“…The nature of these Cr3+ species has been further unraveled by infrared spectroscopy with CO and NO as probe molecules. De Rossi et al have shown that isolated Cr3+ sites with two coordinative vacancies are formed in Cr03/Al2O3 catalysts during alkane dehydrogenation [326], and it is anticipated that these centers are responsible for the activation of the alkane molecules in the absence of oxygen.…”