...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of industrial and engineering chemistry >Dehydrogenation of C3-C4 paraffin's to corresponding olefins over slit-SAPO-34 supported Pt-Sn-based novel catalyst
【24h】

Dehydrogenation of C3-C4 paraffin's to corresponding olefins over slit-SAPO-34 supported Pt-Sn-based novel catalyst

机译：在狭缝SAPO-34负载的Pt-Sn基新型催化剂上将C3-C4链烷烃脱氢为相应的烯烃

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

The objective of this work is to discuss the performance of Pt-Sn/slit-SAPO-34 novel catalyst for selective C3-C4 dehydrogenation to corresponding light olefins. The metallic contents, acidity, active metallic sites and metallic dispersion were determined using a number of physico-chemical techniques as it gives a justification for superior catalytic activity for dehydrogenation reaction. The Pt-Sn/slit-SAPO-34 catalyst was analyzed for dehydrogenation activity under optimized operating conditions; at atmospheric pressure, hydrogen to alkane (feed) molar ratio is 0.2, weight hourly space velocity 5 h~(-1) and temperature 585 °C Around 40% light alkane conversion and above 95% of total olefins selectivity with 94% propene, 92% n-butene and about 84% iso-butene selectivity were achieved over Pt-Sn/slit-SAPO-34 novel catalyst. The catalyst was parametrically characterized over the above said operating conditions and effects of operating conditions on product distribution were discussed. The coke formation was inherently related to catalyst activity in dehydrogenation reaction and related to surface intermetallic ensemble effects; and ultimately the prominent stakeholder in catalyst deactivation. The novel catalysts also showed very good hydrothermal stability in a continuous reaction-regeneration cycles due to silica-based acidic structure of support. The results obtained over Pt-Sn/slit-SAPO-34 novel catalyst were compared with other Pt-Sn-based ZSM-5 and SAPO-34 supported catalysts of similar active metallic content under identical operating conditions.
机译：这项工作的目的是讨论Pt-Sn / slit-SAPO-34新型催化剂选择性C3-C4脱氢为相应的轻质烯烃的性能。金属含量，酸度，活性金属位点和金属分散体是使用多种物理化学技术确定的，因为它为脱氢反应具有优异的催化活性提供了依据。在优化的操作条件下分析了Pt-Sn / slit-SAPO-34催化剂的脱氢活性;在大气压下，氢与烷烃（进料）的摩尔比为0.2，重时空速为5 h〜（-1），温度为585°C，轻链烷烃转化率为40％左右，总烯烃选择性的95％以上，丙烯为94％，与Pt-Sn / slit-SAPO-34新型催化剂相比，可获得92％的正丁烯选择性和约84％的异丁烯选择性。在上述操作条件下对催化剂进行了参数表征，并讨论了操作条件对产物分布的影响。焦炭的形成与脱氢反应中的催化剂活性和表面金属间的整体作用有内在的联系。最终是催化剂失活的主要利益相关者。由于载体的基于二氧化硅的酸性结构，新型催化剂在连续的反应-再生循环中也显示出非常好的水热稳定性。在相同的操作条件下，将通过Pt-Sn / slit-SAPO-34新型催化剂获得的结果与其他具有相似活性金属含量的Pt-Sn基ZSM-5和SAPO-34负载催化剂进行了比较。

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