The Cu/Cr base catalysts were prepared by impregnation. XRD and TPR technology were applied to characterize the catalysts. The result showed that the Cu/Cr base catalysts performed much better than the conventional Cu...The Cu/Cr base catalysts were prepared by impregnation. XRD and TPR technology were applied to characterize the catalysts. The result showed that the Cu/Cr base catalysts performed much better than the conventional Cu/Zn/Al catalysts. The stability of the catalysts was enhanced by promoters such as K, Mg, Ni, Y. But the promoters reduced the initial activity of the catalysts. The promoters except Y improved the selectivity apparently.展开更多
Cu-ZnO/Oxide catalysts wre prepared by deposition which were used for Maleic Anhydride hydrogenating to γ-BL All these catalysts have so good activity and selectivity that these catalysts surpassed one kind of indust...Cu-ZnO/Oxide catalysts wre prepared by deposition which were used for Maleic Anhydride hydrogenating to γ-BL All these catalysts have so good activity and selectivity that these catalysts surpassed one kind of industrial catalyst which was often used in industry The catalyst supported by Al2O3-TiO2 has best activity and selectivity; The catalyst supported by CeO2 has good low-temperature activity which possesses a giant potency for saving energy The results of TPR, XRD and XPS showed that Oxides was the main phases before reducing and only the CuO was reduced to Cu0 Cu0 was the active and the catalyst with good dispersion had good catalytic, such as the catalyst of 50CuO-40ZnO/10(Al2O3-10TiO2)展开更多
The activities of Ni catalysts with different supports in methane decomposition have been studied. The activity order of the catalysts is Ni/SiO 2>Ni/MgO-Al 2O 3>Ni/CaO-Al 2O 3>Ni/α-Al 2O 3 and the interacti...The activities of Ni catalysts with different supports in methane decomposition have been studied. The activity order of the catalysts is Ni/SiO 2>Ni/MgO-Al 2O 3>Ni/CaO-Al 2O 3>Ni/α-Al 2O 3 and the interaction between Ni and the support is in the order of Ni/SiO 2<Ni/MgO-Al 2O 3<Ni/CaO-Al 2O 3<Ni/α-Al 2O 3. It is thus concluded that the weaker the interaction between Ni and support, the higher the activity of the catalyst. It was also found that the activity of the silica supported Ni-catalyst was increased with increase in its average pore radius and predominance pore radius.展开更多
文摘The Cu/Cr base catalysts were prepared by impregnation. XRD and TPR technology were applied to characterize the catalysts. The result showed that the Cu/Cr base catalysts performed much better than the conventional Cu/Zn/Al catalysts. The stability of the catalysts was enhanced by promoters such as K, Mg, Ni, Y. But the promoters reduced the initial activity of the catalysts. The promoters except Y improved the selectivity apparently.
文摘Cu-ZnO/Oxide catalysts wre prepared by deposition which were used for Maleic Anhydride hydrogenating to γ-BL All these catalysts have so good activity and selectivity that these catalysts surpassed one kind of industrial catalyst which was often used in industry The catalyst supported by Al2O3-TiO2 has best activity and selectivity; The catalyst supported by CeO2 has good low-temperature activity which possesses a giant potency for saving energy The results of TPR, XRD and XPS showed that Oxides was the main phases before reducing and only the CuO was reduced to Cu0 Cu0 was the active and the catalyst with good dispersion had good catalytic, such as the catalyst of 50CuO-40ZnO/10(Al2O3-10TiO2)
文摘The activities of Ni catalysts with different supports in methane decomposition have been studied. The activity order of the catalysts is Ni/SiO 2>Ni/MgO-Al 2O 3>Ni/CaO-Al 2O 3>Ni/α-Al 2O 3 and the interaction between Ni and the support is in the order of Ni/SiO 2<Ni/MgO-Al 2O 3<Ni/CaO-Al 2O 3<Ni/α-Al 2O 3. It is thus concluded that the weaker the interaction between Ni and support, the higher the activity of the catalyst. It was also found that the activity of the silica supported Ni-catalyst was increased with increase in its average pore radius and predominance pore radius.
