• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文学位 >Selective hydrogenation of acetylene and hydrodechlorination of 1,2-dichloroethane over palladium bimetallic catalysts.
【24h】

Selective hydrogenation of acetylene and hydrodechlorination of 1,2-dichloroethane over palladium bimetallic catalysts.

机译：在钯双金属催化剂上乙炔的选择性加氢和1,2-二氯乙烷的加氢脱氯。

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

Selectivity and conversion to ethylene were studied in the following reactions: hydrogenation of acetylene and hydrodechlorination of 1,2-dichloroethane. These reactions correspond to a class of reactions, such that A → B → C. In order to maximize the concentration of B, the ratio of the successive rate constants must be considered. This has been accomplished using Pd as the primary metal, which is clustered with a group IB metal. The group IB metal serves as a selectivity and conversion promoter. Gamma-alumina is the most effective support for this reaction. However, silica is used as the support for the hydrodechlorination reaction because the HCl evolved during the reaction poisons alumina.{09}The addition of the group IB metal has the additional advantage of decreasing the deactivation of the catalyst. Both reactions are studied at various temperatures and metal loading.; Two temperature maxima were observed in the selective hydrogenation of acetylene reaction. It is theorized that the formation of a carbonaceous species on the surface of the catalyst enhances the conversion and selectivity to ethylene. Bimetallic clusters were observed through TEM/EDS analysis. The bimetallic catalysts for the hydrodechlorination of 1,2-dichloroethane were found to be more selective to ethylene. Deactivation was decreased over the bimetallic catalysts. Reaction mechanisms have been proposed for the bimetallic catalysts.
机译：在以下反应中研究了选择性和向乙烯的转化：乙炔的氢化和1,2-二氯乙烷的加氢脱氯。这些反应对应于一类反应，例如A→B→C。为了使B的浓度最大化，必须考虑连续速率常数的比率。这是通过使用Pd作为主要金属而实现的，该金属与IB组金属成簇。 IB族金属用作选择性和转化促进剂。 γ-氧化铝是该反应的最有效载体。但是，二氧化硅被用作加氢脱氯反应的载体，因为在反应过程中产生的HCl毒化了氧化铝。{09} IB族金属的添加还具有减少催化剂失活的额外优势。在不同的温度和金属负载下研究了两种反应。在乙炔反应的选择性加氢中观察到两个最高温度。从理论上讲，在催化剂表面上形成碳质物质可提高对乙烯的转化率和选择性。通过TEM / EDS分析观察到双金属簇。发现用于1,2-二氯乙烷加氢脱氯的双金属催化剂对乙烯更具选择性。与双金属催化剂相比，失活减少了。已经提出了双金属催化剂的反应机理。

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