排序方式: 共有6条查询结果,搜索用时 146 毫秒
1
1.
SO2-4/ZrO2-SiO2催化剂的结构及其形成过程 总被引:5,自引:0,他引:5
The structure and the forming process of SO42-/ZrO2-SiO2 catalysts were investigated by TG and DTA. The restraint of silica to the crystallization of the catalysts and the relations of weight loss temperature and loss amount of sulfur oxide bonded to the surface of the catalysts with the contents of zirconia were revealed by experimental results. The forming process of the catalysts was also explored by these techniques, some very important information, which will be useful for understanding the structure and properties of catalysts, were obtained. 相似文献
2.
同步加速器Barrier Bucket高频系统用于克服空间电荷效应的影响,并对束团进行预压缩从而实现束团的多次累积来提高束流的流强。实现Barrier Bucket束流多次累积,要求在同步环高频加速腔上产生一个单正弦电压信号。针对单正弦波形的特点,讨论在同轴加载腔上产生该电压波形的方法和条件。通过对单正弦信号的频谱分析得出信号对加速腔高频系统的带宽要求,运用等效并联电路的方法并将同轴加载腔作线性时不变近似,求出输出的腔体电压与输入的激励电流间的关系。Barrier Bucket电压信号对加速腔整个高频系统的带宽要求至少应为单正弦频率的两倍。输入的激励电流为单正弦信号的基础上叠加上一个直流脉冲偏置,偏置大小为腔体Q值。最后,根据分析的结果在兰州重离子加速器冷却储存实验环(CSRe)高频系统的铁氧体加载腔和新研制的磁合金加载腔系统上进行测试,并对测试结果作相关讨论。 相似文献
3.
The structure and the forming process of SO2-4/ZrO2-SiO2 catalysts were investigated by TG and DTA.The restraint of silica to the crystallization of the catalysts and the relations of weight loss temperature and loss amount of sulfur oxide bonded to the surface of the catalysts with the contents of zirconia were revealed by experimental results.The forming process of the catalysts was also explored by these techniques,some very important information,which will be useful for understanding the structure and properties of catalysts,were obtained. 相似文献
4.
5.
6.
SO42 - /ZrO2 SiO2 催化剂是90年代出现的一种新型复合超强酸催化剂[1 -3],它具有比表面积高、酸量大、制备成本低等显著的优点.热分析技术是研究硫酸促进型超强酸催化剂的重要工具.80年代以来 ,许多研究者曾采用热分析技术对SO4/ZrO2 等催化剂的结构及其形成过程进行了研究[4 -6],所得到的结果为揭开这类催化剂的结构和形成机理起到了重要的作用.本文采用TGA/DTA技术对该催化剂的结构及其酸性结构的形成过程进行了研究 ,结果揭示了催化剂的组成与结晶温度的关系、催化剂中SO42 - 基团与Z… 相似文献
1