Spectroscopic characterization of CuTh oxide catalysts in decomposition of isopropyl alcohol

Abstract

Copper-thorium oxide catalysts prepared with different atomic ratios Cu : Th by coprecipitation of hydroxides and calcination in dry air at 1073 K, have been characterized by electron paramagnetic resonance (EPR) and UV-VIS spectroscopies before and after being tested as catalysts for the decomposition of isopropyl alcohol. The catalysts are selective for dehydrogenation to form acetone only. The simultaneous presence of Cu2+, Cu+ and/or Cuo in the thoria with a ratio of (Cuo + Cu+)/Cu2+ z 2 is required for activity toward isopropyl alcohol dehydrogenation.

UV–Vis–NIRandEPRSpectroscopies

“…Copper-Thoria These catalysts, active in the dehydrogenation of 2-propanol to acetone [59], have been studied by DRS, EPR and in catalysis; evidence was given that the activity is linked with the presence of both Cu 2+ and Cu + or Cu 2+ and Cu 0 .…”

Effects of γ-Irradiation and Ageing on Surface and Catalytic Properties of nano-sized CuO/MgO System towards dehydrogenation and condensation reactions

“…It is noticed that γ-irradiation has been reported to cause both an increase and a decrease in the specific surface areas and the catalytic activities of certain catalytic systems depending on the nature of the irradiated solid, the dose of γ-rays and the nature of catalyzed reaction. Alcohol conversion was studied using various solids such as copper oxide [18], and copper-thorium mixed oxides [19]. The simultaneous presence of Cu 2+ , /Cu 1+ and/or Cu 0 in the thorium oxide is required for alcohol dehydrogenation [19].…”

“…Alcohol conversion was studied using various solids such as copper oxide [18], and copper-thorium mixed oxides [19]. The simultaneous presence of Cu 2+ , /Cu 1+ and/or Cu 0 in the thorium oxide is required for alcohol dehydrogenation [19]. The conversion of iso-propanol over solids containing magnesia catalyst has been investigated using a pulse microcatalytic reactor [20] and flow system [6,7].…”