PtY/Al_2O_3催化剂活性中心初探

An Investigation in Properties of Active Sites for PtY/Al_2O_3

铂铼、铂锡、铂铱等双金属催化剂已有报道,但有关以稀土金属为第2或第3组分的重整催化剂的报道尚很少见,本文报道用中毒法对PtY/Al_2O_3的金属活性中心性质的研究,试图探讨其活性中心与催化性质的某些联系。 1 实验部分 按文献[1]制备催化剂,其中Pt、Y、Cl含量分别为0.3、0.1、1.0 wt％,使用前不焙烧。

The catalytic reforming and active site properties for Pt/Al2O3 and PtY/Al2O3 were studied by using pulse microcatalytic reactor, TEM and poisoning technnique. The kinetic data of dehydro-genation of c'yclohexane for the two catalysts were calculated. The determination of the total numbers of active sites (TNAS) for the catalysts shows that Y makes TNAS increase. The correlation of the catalytic behavior with the particle size and the properties of active sites for the two catalysts has also been discussed here.