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- W2213291254 abstract "The influence of initial surface area and additives on the thermal stability of gamma alumina support was studied using differential thermal analysis and by measuring the rate of transformation by X-ray diffraction of samples calcined at different intervals of time. Of the four additives (Ca++ , Mg+, Ti++ and Fe+++) used, it was found that the addition of iron oxide was the most succesful in increasing the thermal stability or' the support for all initial surface areas. The addition of 5 wt% iron oxide not only decreased the rate of surface area reduction, but also altered the final phase of the solid at temperatures of approximately 1235 C. After prolonged periods of exposure to high temperatures (900 C) the concentration of the additive on the surface of the support decreased. This prolonged exposure also had the effect of increasing the proportion of the thermodinamically stable alpha-alumina present in the support. A theory explained the phenomena is also presented." @default.
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- W2213291254 date "1989-01-01" @default.
- W2213291254 modified "2023-09-23" @default.
- W2213291254 title "Influence of surface area and additives on the thermal stability of alumina catalyst support" @default.
- W2213291254 hasPublicationYear "1989" @default.
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