Mg-Ni/BaTiO_3催化剂上CH_4/CO_2重整反应研究

CH_4/CO_2 reforming to syngas over Mg-Ni/BaTiO_3 catalyst

采用等体积浸渍法制备了MgO改性的一系列Mg-Ni/BaTiO3催化剂,并在固定床反应装置上考察了这些催化剂对CO2重整CH4反应的催化活性。结果表明,MgO质量负载为5%的Mg-Ni/BaTiO3催化剂活性最好。考察了不同浸渍顺序对催化剂性能的影响,结果表明,先浸镁盐后浸镍盐制得的催化剂催化性能更为理想。XRD、TPR和TPD表征发现,与催化剂Ni/BaTiO3相比,MgO的添加有利于提高催化剂的催化活性和抗积炭性能,对催化剂起到了良好的改性作用。

A series of Mg-Ni/BaTiO3 catalysts（Ni/BaTiO3 promoted by MgO） were prepared by impregnation method;their catalytic activity for CH4/CO2 reforming to syngas was examined with a fixed bed reactor.The results showed that Mg-Ni/BaTiO3 catalyst with an MgO loading of 5% performs best in CH4/CO2 reforming.The sequence for impregnation during the catalyst preparation may also influence the activity of resultant catalyst;Mg should be impregnated prior to Ni to get high active Mg-Ni/BaTiO3 catalyst.Compared with Ni/BaTiO3,the addition of MgO promoter can enhance its catalytic activity and resistance to carbon deposition for CH4/CO2 reforming.