一种用于原位X射线吸收光谱的新型高温反应器：在Ni/ZrO催化剂上甲烷干重整中的应用。

A new high temperature reactor for operando XAS: Application for the dry reforming of methane over Ni/ZrO catalyst.

作者信息

Aguilar-Tapia Antonio, Ould-Chikh Samy, Lahera Eric, Prat Alain, Delnet William, Proux Olivier, Kieffer Isabelle, Basset Jean-Marie, Takanabe Kazuhiro, Hazemann Jean-Louis

机构信息

King Abdullah University of Science and Technology (KAUST), KAUST Catalysis Center (KCC) and Physical Sciences and Engineering Division (PSE), 4700 KAUST, Thuwal 23955-6900, Saudi Arabia.

OSUG, UMS 832 CNRS-Université Grenoble Alpes, F-38041 Grenoble, France.

出版信息

Rev Sci Instrum. 2018 Mar;89(3):035109. doi: 10.1063/1.4998929.

DOI:10.1063/1.4998929

PMID:29604772

Abstract

The construction of a high-temperature reaction cell for operando X-ray absorption spectroscopy characterization is reported. A dedicated cell was designed to operate as a plug-flow reactor using powder samples requiring gas flow and thermal treatment at high temperatures. The cell was successfully used in the reaction of dry reforming of methane (DRM). We present X-ray absorption results in the fluorescence detection mode on a 0.4 wt. % Ni/ZrO catalyst under realistic conditions at 750 °C, reproducing the conditions used for a conventional dynamic microreactor for the DRM reaction. The setup includes a gas distribution system that can be fully remotely operated. The reaction cell offers the possibility of transmission and fluorescence detection modes. The complete setup dedicated to the study of catalysts is permanently installed on the Collaborating Research Groups French Absorption spectroscopy beamline in Material and Environmental sciences (CRG-FAME) and French Absorption spectroscopy beamline in Material and Environmental sciences at Ultra-High Dilution (FAME-UHD) beamlines (BM30B and BM16) at the European Synchrotron Radiation Facility in Grenoble, France.

摘要

报道了用于原位X射线吸收光谱表征的高温反应池的构建。设计了一种专用反应池，用作活塞流反应器，用于需要气体流动和高温热处理的粉末样品。该反应池已成功应用于甲烷干重整（DRM）反应。我们展示了在750°C实际条件下，0.4 wt.% Ni/ZrO催化剂在荧光检测模式下的X射线吸收结果，重现了用于传统DRM反应动态微反应器的条件。该装置包括一个可完全远程操作的气体分配系统。该反应池提供了透射和荧光检测模式的可能性。专门用于催化剂研究的完整装置永久安装在法国格勒诺布尔欧洲同步辐射装置材料与环境科学合作研究组法国吸收光谱光束线（CRG-FAME）以及超高稀释材料与环境科学法国吸收光谱光束线（FAME-UHD）光束线（BM30B和BM16）上。