• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>RSC Advances >A mesoporous aluminosilicate prepared by simply coating fibrous γ-AlOOH on the external surface of SBA-15 for catalytic hydrocarbon cracking
【24h】

A mesoporous aluminosilicate prepared by simply coating fibrous γ-AlOOH on the external surface of SBA-15 for catalytic hydrocarbon cracking

机译：通过在SBA-15外表面上涂覆纤维γ-ALOOH而催化烃裂化制备的介孔硅铝酸盐

获取原文
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

A binary SiO _(2) /Al _(2) O _(3) composite with fibrous γ-alumina coating on the external surface of SBA-15 has been synthesized by simply mixing SBA-15 with fibrous boehmite sol, followed by aging and calcination. The textural and acidic properties of the resultant material were characterized by various techniques, i.e. powder X-ray diffraction (XRD), scanning electron microscopy (SEM), infrared (IR) spectroscopy, N _(2) adsorption/desorption, nuclear magnetic resonance (NMR) spectroscopy, and temperature programmed desorption of ammonia and ethanol (NH _(3) -TPD and EtOH-TPD). Coating fibrous γ-alumina stabilized the SBA-15 structure against collapse under critical steaming conditions (800 °C and 4 h) allowing for the facile synthesis of mesoporous aluminosilicate. The migration of aluminum and silicon between the alumina and SBA-15 zones led to the formation of Al–OH–Si with weak acidity which served as the active sites with excellent catalytic performance in the cracking of 1,3,5-triisopropyl benzene (TIPB).
机译：通过简单地将SBA-15与纤维勃姆石溶胶混合，合成了SBA-15外表面上的纤维γ-氧化铝涂层的二元SiO_（2）/ Al _（2）O o _（3）复合材料，随后是老化和煅烧。所得材料的纹理和酸性特性通过各种技术，即粉末X射线衍射（XRD），扫描电子显微镜（SEM），红外（IR）光谱，N _（2）吸附/解吸，核磁共振（NMR）光谱，和温度编程的氨和乙醇的解吸（NH _（3）-TPD和EtOH-TPD）。涂层纤维γ-氧化铝稳定在临界蒸汽条件（800℃和4h）下的坍塌结构（800℃和4小时）稳定坍塌，允许容纳脱孔硅铝酸盐的合成。氧化铝和SBA-15区之间的铝和硅的迁移导致弱酸度的Al-OH-Si形成，其用作具有优异的催化性能的活性位点，在1,3,5-三异丙基苯的裂缝中（蒂布）。

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