【摘要】 研究了Pd-Al₂O₃,Pt-Al₂O₃,Pd-Pt-Al₂O₃催化剂的除氢活性。试验结果表明,Pd-Pt-Al₂O₃双金属催化剂的除氢活性,抗硫性和抗CO性能较Pd-Al₂O₃,Pt-Al₂O₃单金属催化剂好。稳定性试验和工业试验表明,Pd-Pt-Al₂O₃双金属催化剂具有良好的稳定性和工业应用效果。采用TEM,TPR,IR和ESCA对催化剂表面性质进行研究的结果表明,Pd-Pb-Al₂O₃双金属催化剂的表面性质和Pd-Al₂O₃,Pt-Al₂O₃单金属催化剂的不同。Pd-Pb-Al₂O₃双金属催化剂中两种金属之间可能发生相互作用并形成金属簇的新相。更多还原

【Abstract】 The hydrogen-removal activity（HRA） of Pd-Al₂O₃, Pt-Al₂O₃, and Pd-Pt-Al₂O₃ catalysts was studied. It was found that the HRA and the resistance to S or CO of Pd-Pt-Al₂O₃ bimetallic catalyst were higher than that of Pd-Al₂O₃ and Pt-Al₂O₃ monometallic catalysts. The stability and industrial tests showed that the Pd-Pt-Al₂O₃ bimetallic catalyst had good stability and performance in industrial applications. The surface properties of catalysts wcre characterized by TEM, TPR, IR, and ESCA, It was observed that the surface properties of Pd-Pt-Al₂O₃ bimetallic catalyst were different from that of Pd-Al₂O₃ and Pt-Al₂O₃ monometallic catalysts. It seems that there may be some interaction between the two metals in the bimetallic catalyst with the formation of a new phase of metal cluster.更多还原