Nanometer SnO2 particles were synthesized by sol-gel dialytic processes and used as a support to prepare CuO supported catalysts via a deposition-precipitation method. The samples were characterized by means of TG-DTA...Nanometer SnO2 particles were synthesized by sol-gel dialytic processes and used as a support to prepare CuO supported catalysts via a deposition-precipitation method. The samples were characterized by means of TG-DTA, XRD, H2-TPR and XPS. The catalytic activity of the CuO/TiO2-SnO2 catalysts was markedly depended on the loading of CuO, and the optimum CuO loading was 8 wt.% （Tloo = 80 ℃）. The CuO/TiO2-SnO2 catalysts exhibited much higher catalytic activity than the CuO/TiO2 and CuO/SnO2 catalysts. H2-TPR result indicated that a large amount of CuO formed the active site for CO oxidation in 8 wt.% CuO/TiO2-SnO2 catalyst.展开更多
以γ-Al_2O_3为载体,采用等体积浸渍法制备了4种不同镍钨质量比的Ni-W/γ-Al_2O_3催化剂,采用X射线衍射(XRD)、N2吸附-脱附、程序升温脱附(NH_3-TPD)和扫描电镜(SEM)等方法对催化剂物化性质进行表征,在30 m L固定床反应器上对小于360℃...以γ-Al_2O_3为载体,采用等体积浸渍法制备了4种不同镍钨质量比的Ni-W/γ-Al_2O_3催化剂,采用X射线衍射(XRD)、N2吸附-脱附、程序升温脱附(NH_3-TPD)和扫描电镜(SEM)等方法对催化剂物化性质进行表征,在30 m L固定床反应器上对小于360℃低温煤焦油馏分油进行加氢实验,筛选出加氢效果较好的催化剂,并考察了加氢工艺条件对加氢产物分布情况及杂原子脱除效果的影响。结果表明,高温不利于油品轻质化且会降低噻吩类有机含硫物的脱除速率,但是有利于脱除难脱除的多环含氮物;高压可以抑制裂化反应和脱氢反应,增加汽柴油的收率,同时有利于提高多环含氮物的加氢饱和反应速率,进而提高脱氮率;低空速下进行加氢反应有利于杂原子脱除和油品轻质化。展开更多
基金supported by the National Natural Science Foundation of China (20771061 and 20871071)the 973 Program (2005CB623607)Science and Technology Commission Foundation of Tianjin (08JCYBJC00100 and 09JCYBJC03600)
文摘Nanometer SnO2 particles were synthesized by sol-gel dialytic processes and used as a support to prepare CuO supported catalysts via a deposition-precipitation method. The samples were characterized by means of TG-DTA, XRD, H2-TPR and XPS. The catalytic activity of the CuO/TiO2-SnO2 catalysts was markedly depended on the loading of CuO, and the optimum CuO loading was 8 wt.% （Tloo = 80 ℃）. The CuO/TiO2-SnO2 catalysts exhibited much higher catalytic activity than the CuO/TiO2 and CuO/SnO2 catalysts. H2-TPR result indicated that a large amount of CuO formed the active site for CO oxidation in 8 wt.% CuO/TiO2-SnO2 catalyst.
文摘以γ-Al_2O_3为载体,采用等体积浸渍法制备了4种不同镍钨质量比的Ni-W/γ-Al_2O_3催化剂,采用X射线衍射(XRD)、N2吸附-脱附、程序升温脱附(NH_3-TPD)和扫描电镜(SEM)等方法对催化剂物化性质进行表征,在30 m L固定床反应器上对小于360℃低温煤焦油馏分油进行加氢实验,筛选出加氢效果较好的催化剂,并考察了加氢工艺条件对加氢产物分布情况及杂原子脱除效果的影响。结果表明,高温不利于油品轻质化且会降低噻吩类有机含硫物的脱除速率,但是有利于脱除难脱除的多环含氮物;高压可以抑制裂化反应和脱氢反应,增加汽柴油的收率,同时有利于提高多环含氮物的加氢饱和反应速率,进而提高脱氮率;低空速下进行加氢反应有利于杂原子脱除和油品轻质化。
