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Deactivation of red mud and modified red mud used as catalyst for the hydrodechlorination of tetrachloroethylene

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  • Earth Science


In this work, the deactivation of sulfided red mud and sulfided catalysts based on red mud was studied for the hydrodechlorination of tetrachloroethylene. Activity curves were obtained in a fixed bed reactor at 350°C, 100 bar and 0.8 Nl/min of hydrogen. Samples of fresh and used catalysts were characterised by different techniques: Morphology and surface concentration by Scanning Electron Microscopy, textural properties by nitrogen adsorption and crystallographic phases by X-ray Diffraction. Concentration of coke precursors was measured by Thermogravimetry, and acidity of fresh catalysts was evaluated by Differential Scanning Calorimetry of samples soaked in butylamine

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