-
38浏览
-
0点赞
-
0收藏
-
0分享
-
183下载
-
0评论
-
引用
期刊论文
Influence of calcination temperature and preparation method of TiO2-ZrO2 on conversion of cyclohexanone oxime to ε-caprolactam over B2O3/TiO2-ZrO2 catalyst
Applied Catalysis A: General 263(2004)83-89,-0001,():
The effects of calcination temperature and preparation method of TiO2-ZrO2 mixed oxide on catalytic performance of B2O3/TiO2-ZrO2 catalysts were investigated. TiO2-ZrO2 mixed oxides with the same molar ratio of 1:1 were prepared by co-precipitation method, homogeneous precipitation method, sol-gel method and physical mixing method; each oxidewas calcined at a temperature between 110 and 700℃. Catalytic synthesis of ε-caprolactam from cyclohexanone oxime was evaluated in a fixed-bed flow microreactor at 300℃ and atmosphere pressure. Characterization of catalysts was carried out using adsorption of nitrogen, X-ray diffraction (XRD), Fourier transform-infrared spectroscopy (FTIR) and temperature-programmed desorption of ammonia (NH3-TPD) techniques. The experimental results reveal that the calcination temperature in the range of 110-500℃ had only a slight effect on the catalytic performance, but after calcination at 700℃, the ZrTiO4 crystallite was formed and accounted for the decrease of acidity and catalytic performance. The co-precipitation method provided the catalyst with the highest reactivity while the physical mixing method resulted in the worst catalyst. Catalytic performance of the B2O3/TiO2-ZrO2 catalyst was closely related to its acid strength distributions and pore size.
【免责声明】以下全部内容由[卢冠忠]上传于[2005年03月04日 22时28分40秒],版权归原创者所有。本文仅代表作者本人观点,与本网站无关。本网站对文中陈述、观点判断保持中立,不对所包含内容的准确性、可靠性或完整性提供任何明示或暗示的保证。请读者仅作参考,并请自行承担全部责任。
本学者其他成果
同领域成果