负载型Pd催化剂催化苯酚原位加氢反应研究

Phenol In-situ Hydrogenation with Supported Pd Catalyst

以氯钯酸为前驱体,采用浸渍共沉淀还原法制备Pd/纳米碳管(CNTs)和Pd/活性炭(AC)催化剂。在493 K,3.5 MPa下,考察催化剂在"苯酚+甲醇+水"原位加氢反应中的催化活性。实验结果表明,Pd/CNTs对苯酚原位加氢制环己酮有更高的选择性。通过COTPD,TEM表征结果表明,这主要是由于Pd/CNTs催化剂独特的中孔结构和内腔孔道。

Carbon nanotube（CNT） and activated carbon（AC）-supported Pd catalysts have been prepared by impregnation and reduction-precipitation method using chloropalladate acid as metal precursor.The catalytic performance for ＂phenol＋methanol＋water＂ in-situ hydrogenation was evaluated under 493 K,3.5 MPa. The results show that Pd/CNTs catalyst has higher selective for phenol in-situ hydrogenation to cyclohexanone. The catalysts have been characterised by CO-TPD and TEM. The mesoporosity structure and inner hollow cavities of Pd/CNTs catalyst are responsible for the distinguished properties.