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- W2085461924 abstract "Abstract Coprecipitated silica-alumina gel was prepared to contain 11.8 mol.% alumina. The gel was calcined at 523, 673, 823, 973 and 1173 K. The calcination products were irradiated by γ-rays (15–75 Mrad). Nitrogen adsorption at 77 K, water vapour adsorption at 303 K, pyridine chemisorption at 423 K were measured for non-irradiated and γ-irradiated silica-alumina samples. The dehydration of isopropanol was measured at 553 K and at a carrier gas flow rate = 25 ml/min. γ-Irradiation (30–75 Mrad) caused appreciable changes in textural properties of silica-alumina. The extents of these changes depend on the irradiation dose and on the pre-calcination temperature. Irradiation with γ-rays decreased the surface acid density and consequently the activity of the irradiated sample towards acid catalyzed reactions decreased." @default.
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- W2085461924 date "1990-01-01" @default.
- W2085461924 modified "2023-09-22" @default.
- W2085461924 title "Modification of surface properties of silica-alumina by irradiation with gamma-rays" @default.
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- W2085461924 doi "https://doi.org/10.1016/1359-0197(90)90030-l" @default.
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