...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>The journal of physical chemistry, B. Condensed matter, materials, surfaces, interfaces & biophysical >Adsorption of n-Alkanes on Silicalite Crystals. A Temperature-Programmed Desorption Study
【24h】

Adsorption of n-Alkanes on Silicalite Crystals. A Temperature-Programmed Desorption Study

机译：正烷烃在硅藻土晶体上的吸附。程序升温脱附研究

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 adsorption mechanism of n-alkanes on silicalite has been studied by a modified temperature-programmed desorption (TPD) technique. These experiments are performed by thermogravimetry at constant hydrocarbon partial pressure and at slow heating rate. This work establishes the reversibility of the adsorption m, and it is demonstrated that TPD experiments occur under conditions that are very close to equilibrium. quasi-chemical approach taking into account different adsorption sites provides a good modeling of the TPD curves. Sorption enthalpy and entropy variations of n-alkanes are obtained. The sorption data for n-butane to n-octane are in good agreement with adsorption literature data. Moreover, they provide relevant information on the adsorption mechanism and show that entropic effects are predominant.
机译：通过改进的程序升温脱附（TPD）技术研究了正构烷烃在硅沸石上的吸附机理。这些实验是通过热重法在恒定烃分压和缓慢加热速率下进行的。这项工作建立了吸附m的可逆性，并且证明了TPD实验是在非常接近平衡的条件下进行的。考虑不同吸附位点的准化学方法为TPD曲线提供了良好的建模。获得了正构烷烃的吸附焓和熵变。正丁烷到正辛烷的吸附数据与吸附文献数据非常吻合。而且，它们提供了有关吸附机理的相关信息，并表明熵效应是主要的。

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