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A THREE STEP GYPSUM DEHYDRATION PROCESS

The activation energy was determined for heating rates varying from 0.5°C/min to 5°C /min. The following equation was used to estimate the activation energy  [Pg.478]

The calcium sulfate-water bonds appear to be relatively strong as they can be observed at temperatures up to 450°C. The possibility of parallel reactions after the first reaction is postulated. The reaction would be dehydration of hemihydrate directly to the anhydrite and dehydration of hemihydrate to an intermediate product containing 0.15 moles of water. [Pg.479]

Section 8.0-A Three Step Gypsum Dehydration Process... [Pg.477]

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