PVP-Pd催化剂六氯苯加氢脱氯中两种氢源的贡献

近年来，随着环境问题的日益突出，含卤有机化合物作为一类主要的环境污染物,其加氢脱卤反应的研究越来越多地受到人们的关注.

Contribution of Two Kinds of Hydrogen Sources to the Hydrodechlorination of Perchlorobenzene Catalyzed by PVP-Supported Pd

Hydrodechlorination of perchlorobenzene catalyzed by PVP Pd is conducted in different solvents. Besides H 2, alcoholic solvent also provides hydrogen for the substrate. Influences of various solvents, reaction temperature, the amount of NaOAc and different catalysts on the contribution of two kinds of hydrogen sources are investigated. The results show that solvent and reaction temperature affect the reaction obviously. Contribution of hydrogen from solvents follows the sequence of n propanol>ethanol> iso propanol>water(=0). At room temperature, ethanol does not provide hydrogen. With the elevation of reaction temperature, the contribution of hydrogen from ethanol increases. With PVP Pd catalyst, the apparent activation energies using H 2 and ethanol as hydrogen source are 33 kJ/mol and 60 kJ/mol respectively.