CFC-115加氢脱氯制HFC-125 Pd/C催化剂制备研究

以商品化活性炭为载体、贵金属Pd为活性组分,采用浸渍法制备了一系列Pd/C催化剂.在常压固定床微型反应器中,以CFC-115加氢脱氯生产臭氧消耗物质(ODS)替代品HFC-125为目标反应,评价了催化剂的性能.详细考察了载体预处理硝酸浓度、载体粒径、Pd源前驱体及溶剂等制备条件对其催化性能的影响.在研究的范围内,采用粉末活性炭为载体,Pd(NO_3)_2为Pd源,甲醇为溶剂制备的催化剂具有最好的催化性能.

Preparation of Pd/C catalysts for hydrodechlorination of CFC-115 into HFC-125

The commercial activated carbon is used as support and the noble metal Pd as active species,a series of Pd/C catalysts are prepared by impregnation.The catalytic hydrodechlofination of CFC-115 into the ODS substitute HFC-125 over the prepared catalysts is conducted in a fixed-bed micmreactor at atmosphere pressure.The catalyst preparation conditions such as concentrations of nitric acid,particle sizes of support,palladium precursors,and a type of solvent,which can significantly affect catalytic properties in the hydrodechlorination,are investigated in detail.The result shows that the catalyst,which is prepared with activated carbon as support,Pd(NO_3)_2 as Pd source,methanol as solvent,has goed catalytic performance.