ZnO/SiO\-2 and ZnO\|SiO\-2 catalysts were prepared by the impregnation and sol\|gel method, respectively. The characterization of the catalysts by XPS and FTIR indicated that much "free" zinc oxide and unrea...ZnO/SiO\-2 and ZnO\|SiO\-2 catalysts were prepared by the impregnation and sol\|gel method, respectively. The characterization of the catalysts by XPS and FTIR indicated that much "free" zinc oxide and unreacted Si\_OH existed on the surface of ZnO/SiO\-2 sample. As for ZnO\|SiO\-2 sol\|gel catalyst, the corresponding phenomena were not observed. The prepared samples were also used as the catalysts for decomposition of 2\|butanol. A high selectivity for dehydrogenation was observed over the supported catalyst. However, a high selectivity for dehydration was shown over the ZnO\|SiO\-2 sol\|gel catalyst. The opposite selectivity for dehydration or dehydrogenation observed over the two kinds of catalysts may be just because of the different surface structures of the catalysts.展开更多
本文通过晶格取代作用 ,制备了以 Ni为活性组分的六铝酸盐复合氧化物催化剂 Sr Ni Al11O19-δ,并通过XRD,XPS,TPR等实验技术 ,对催化剂的结构和性质进行了表征。结果表明 ,六铝酸盐 Sr Ni Al11O19-δ对二氧化碳重整甲烷制合成气反应具...本文通过晶格取代作用 ,制备了以 Ni为活性组分的六铝酸盐复合氧化物催化剂 Sr Ni Al11O19-δ,并通过XRD,XPS,TPR等实验技术 ,对催化剂的结构和性质进行了表征。结果表明 ,六铝酸盐 Sr Ni Al11O19-δ对二氧化碳重整甲烷制合成气反应具有良好的催化活性和稳定性 ,在 780℃反应 2小时 ,CH4 和 CO2 转化率分别为 95 .0 %和 93 .4% ,没有发现活性组分 Ni高温烧结和催化剂失活。展开更多
文摘ZnO/SiO\-2 and ZnO\|SiO\-2 catalysts were prepared by the impregnation and sol\|gel method, respectively. The characterization of the catalysts by XPS and FTIR indicated that much "free" zinc oxide and unreacted Si\_OH existed on the surface of ZnO/SiO\-2 sample. As for ZnO\|SiO\-2 sol\|gel catalyst, the corresponding phenomena were not observed. The prepared samples were also used as the catalysts for decomposition of 2\|butanol. A high selectivity for dehydrogenation was observed over the supported catalyst. However, a high selectivity for dehydration was shown over the ZnO\|SiO\-2 sol\|gel catalyst. The opposite selectivity for dehydration or dehydrogenation observed over the two kinds of catalysts may be just because of the different surface structures of the catalysts.
文摘本文通过晶格取代作用 ,制备了以 Ni为活性组分的六铝酸盐复合氧化物催化剂 Sr Ni Al11O19-δ,并通过XRD,XPS,TPR等实验技术 ,对催化剂的结构和性质进行了表征。结果表明 ,六铝酸盐 Sr Ni Al11O19-δ对二氧化碳重整甲烷制合成气反应具有良好的催化活性和稳定性 ,在 780℃反应 2小时 ,CH4 和 CO2 转化率分别为 95 .0 %和 93 .4% ,没有发现活性组分 Ni高温烧结和催化剂失活。
