• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Bulletin of the Korean Chemical Society >Incorporation of Titanium into H-ZSM-5 Zeolite via Chemical Vapor Deposition: Effect of Steam Treatment
【24h】

Incorporation of Titanium into H-ZSM-5 Zeolite via Chemical Vapor Deposition: Effect of Steam Treatment

机译：通过化学气相沉积将钛掺入H-ZSM-5沸石中：蒸汽处理的效果

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Ti-ZSM-5 prepared by secondary synthesis,from the reaction of H-ZSM-5 with vapor phase TiCl_4,was characterized with several physicochemical techniques including FT-IR and UV/VIS-DRS.It was found that zeolite structure,surface area and pore volume did not change,and the framework aluminum could not be replaced by titanium atom during the secondary synthesis of Ti-ZSM-5.The incorporation of titanium into the framework might be due to reaction of TiCl_4 with the silanol groups associated with defects or surface sites.The formation of extra-framework titanium could not be avoided,unless the samples were further treated by water vapor at 550 deg C or higher temperature.High temperature steam treatment of Ti-ZSM-5 prepared by chemical vapor deposition with TiCl_4 was efficient to prevent the formation of non-framework titanium species.Ti-ZSM-5 zeolites prepared in this work contained only framework titanium species and exhibited improved catalytic property close to TS-1 prepared by hydrothermal synthesis.
机译：通过H-ZSM-5与气相TiCl_4的反应，通过二次合成制备了Ti-ZSM-5，并通过FT-IR，UV / VIS-DRS等多种理化技术对其进行了表征。发现沸石的结构，表面积Ti-ZSM-5的二次合成过程中，孔体积没有变化，骨架铝不能被钛原子取代。钛向骨架中的掺入可能是由于TiCl_4与缺陷相关的硅烷醇基反应除非避免在550摄氏度或更高温度下用水蒸汽进一步处理样品，否则无法避免形成额外骨架的钛。通过TiCl_4化学气相沉积法制备的Ti-ZSM-5高温蒸汽处理有效地防止了非骨架钛物种的形成。在这项工作中制备的Ti-ZSM-5沸石仅包含骨架钛物种，并且具有与加氢合成的TS-1接近的催化性能。合理的合成。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号