...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Catalysis science & technology >Hierarchical MFI type zeolites with intracrystalline macropores: the effect of the macropore size on the deactivation behaviour in the MTO reaction
【24h】

Hierarchical MFI type zeolites with intracrystalline macropores: the effect of the macropore size on the deactivation behaviour in the MTO reaction

机译：分层MFI型沸石晶体内的大孔隙:的效果大孔隙大小的失活行为MTO反应

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

Hierarchically structured ZSM-5 catalysts have been prepared using different sized mesoporous silica particles as the sacrificial template, resulting in zeolite crystals with different sized intracrystalline macropores but very similar zeolitic characteristics such as crystallinity, chemical composition, and acidic and textural properties. This set of catalysts was used to investigate the effect of intracrystalline macropores on the deactivation behaviour of ZSM-5 catalysts in the conversion of methanol to olefins (MTO). The catalytic tests showed that the incorporation of macropores was very beneficial in improving the catalyst lifetime in the MTO reaction. This improved performance was correlated to the reduced coke formation during the reaction, likely a result of the enhanced transport of reactants and products in the zeolite crystals due to the well-interconnected macropores. Also worth mentioning is the effect of the dimensions of the additional macropores on the rate of coke formation. Increasing the macropore size by a factor of two led to a decrease in coke formation and consequently a two times longer catalyst lifetime.
机译：分层结构化ZSM-5催化剂准备使用不同大小的介孔二氧化硅粒子作为牺牲模板,导致沸石晶体具有不同大小的晶体内的大孔隙,但非常类似于沸石的特征等结晶度、化学成分和酸性和结构属性。用于调查的影响晶体内的大孔隙在失活ZSM-5行为转化的催化剂甲醇制烯烃(MTO)。显示的大孔隙在改善催化剂非常有益一生在MTO反应。性能相关的降低可乐形成反应期间,可能的结果增强的反应物和产物的运输在沸石晶体由于well-interconnected大孔隙。提及的尺寸的影响额外的大孔隙率的可乐形成。因子2导致减少焦炭的形成因此一个长两倍的催化剂一生。

著录项

相似文献

  • 外文文献
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