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Characteristic of physicochemical properties of Pd/MgO catalysts used in the hydrodechlorination process with CCl4

Góralski J., Szczepaniak B., Grams J., Maniukiewicz W., Paryjczak T.

Polish Journal of Chemical Technology

2007

Vol. 9, nr 3

77-80

The aim of this paper was to investigate the physicochemical properties of palladium catalyst containing basic support MgO which was used in hydrodechlorination reaction with carbon tetrachloride. In order to characterize the investigated sample the catalyst was put to tests of XRD, TOF - SIMS, TG-DTA-MS and TPR(H2), measurements, activity tests were also performed. The XRD and TPR results demonstrated the presence of PdOxCly species whose decomposition takes place above 700°C. The calcination of the Pd/MgO catalyst at 700°C resulted in the transformation of PdOxCly to PdO.

Recovery of carbon tetrachloride from waste water

Pełech R., Bembnowska A., Milchert E.

Polish Journal of Chemical Technology

2001

Vol. 3, nr 3

17-19

Studies of the adsorption properties on activated carbons in relation to aqueous solutions of CC14 under static and dynamic conditions were conducted. Activated carbons (ACs) DTO, DTX-3 and A were used as the adsorbents. The times required to achieve the adsorption equilibrium for these adsorbents have been determined. The courses of the adsorption isotherms are accurately described by Freundlich, Langmuir and Freundlich -Langmuir equations. The adsorptivity and the fundamental magnitudes of dynamic CC14 adsorption from water on fixed - bed were determined for DTO carbon, which has the highest static adsorptivity.