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- W2025740198 abstract "The kinetics of the reaction between SO 2 and calcium oxide, produced from calcining reagent grade calcium hydroxide, was studied using a thermogravimetric analyzer (TGA). A thin layer of Ca(OH) 2 was deposited on quartz plates, calcined to form CaO, and then sulfated to obtain kinetic information. Using the TGA, a quantitative measurement of the solid product distribution was obtained. In the presence of oxygen and above 740°C, the product is all CaSO 4 and the reaction is first order in SO 2 concentration. Below 560°C, the major product is CaSO 3 and the reaction is zero order. The grains of CaO obtained by calcining Ca(OH) 2 were found to contain micropores, with a large number of them around 22 Å in radius. The effect of sintering and sulfation on the micropores was studied using mercury porosimetry. Pore closure of the micropores, diffusion through the product layer, and product sintering were shown to influence the reaction at high conversion levels. Estimates of the solid state diffusivity and its activation energy were made using rate data from the reaction of highly sintered CaO." @default.
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- W2025740198 date "1985-01-01" @default.
- W2025740198 modified "2023-10-06" @default.
- W2025740198 title "Rate and diffusional study of the reaction of calcium oxide with sulfur dioxide" @default.
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- W2025740198 doi "https://doi.org/10.1016/0009-2509(85)85104-6" @default.
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