A series of VCsCuT1 catalysts were prepared by impregnation method The activity and selectivity of the catalysts for selective oxidation of p-tert butyl toluene to p-tert benzaldelyde were studied The effect of differ...A series of VCsCuT1 catalysts were prepared by impregnation method The activity and selectivity of the catalysts for selective oxidation of p-tert butyl toluene to p-tert benzaldelyde were studied The effect of different ratio of T1 on the structure and catalytic properties of the catalysts were investigated by means of XRD and IR technology The results indicated that the additive of T1 could obviously raise the selectivity of reaction On V-Cs-Cu-T1 catalyst, the excellent result that conversion of p-tert butyl toluene and the selectivity of p-tert benzaldelyde reach about 12mol% and 85mol% respectively were gained After running 365 h, the catalyst still possesses good catalytic展开更多
NO-TPSR and CO-NO catalytic reaction on Pt/HM and Pd/HM were studied. There are three kinds of NO adsoption sites. The lower temperature adsoption site is attributed to the metal Pt or Pd, and the two higher temperatu...NO-TPSR and CO-NO catalytic reaction on Pt/HM and Pd/HM were studied. There are three kinds of NO adsoption sites. The lower temperature adsoption site is attributed to the metal Pt or Pd, and the two higher temperature adsoption sites are attributed to the basic sites on HM surface. The adsorbed NO undergoes extensive de composition to form N2. N2O and O2 during NO thermal desorption on all catalysts studied. The desorption of N2. N2O and NO on Pt/HM catalyst is easier than that on Pd/HM catalyst. Pt/HM catalytic activity for CO-NO reaction is higher than Pd/HM’s,which is consistant with NO decomposition ability of the catalyst. The dissociation of NO on catalyst is the rate determing step of CO-NO reaction.展开更多
文摘A series of VCsCuT1 catalysts were prepared by impregnation method The activity and selectivity of the catalysts for selective oxidation of p-tert butyl toluene to p-tert benzaldelyde were studied The effect of different ratio of T1 on the structure and catalytic properties of the catalysts were investigated by means of XRD and IR technology The results indicated that the additive of T1 could obviously raise the selectivity of reaction On V-Cs-Cu-T1 catalyst, the excellent result that conversion of p-tert butyl toluene and the selectivity of p-tert benzaldelyde reach about 12mol% and 85mol% respectively were gained After running 365 h, the catalyst still possesses good catalytic
文摘NO-TPSR and CO-NO catalytic reaction on Pt/HM and Pd/HM were studied. There are three kinds of NO adsoption sites. The lower temperature adsoption site is attributed to the metal Pt or Pd, and the two higher temperature adsoption sites are attributed to the basic sites on HM surface. The adsorbed NO undergoes extensive de composition to form N2. N2O and O2 during NO thermal desorption on all catalysts studied. The desorption of N2. N2O and NO on Pt/HM catalyst is easier than that on Pd/HM catalyst. Pt/HM catalytic activity for CO-NO reaction is higher than Pd/HM’s,which is consistant with NO decomposition ability of the catalyst. The dissociation of NO on catalyst is the rate determing step of CO-NO reaction.
