Design of a high-temperature and high-pressure liquid flow cell for x-ray absorption fine structure measurements under catalytic reaction conditions

• Kawai, Toshihide

• Chun, Wang-Jae

• Asakura, Kiyotaka

• Koike, Yuichiro

• Nomura, Masaharu

• Bando, Kyoko K.

• Oyama, S. Ted

• Sumiya, Hitoshi

Abstract

The design and performance of a new high-pressure and high-temperature cell for measurement of x-ray absorption fine structure (XAFS) spectra of solid catalysts working in a flowing liquid are presented. The cell has flat, high-purity sintered cubic boron nitride (c-BN) windows which can tolerate high temperature (900 K) and high pressure (10 MPa). The c-BN is a new material which has the highest tensile strength, second only to diamond, and is also chemically and thermally stable. The use of the cell is demonstrated for measurements of PtPd/Al2O3 and Ni2P/SiO2 hydrodesulfurization catalysts at reaction conditions. A technique called delta χ (Δχ), involving determining the difference between XAFS spectra of the sample at reaction conditions and the bare sample, is introduced.

Journal

• Review of Scientific Instruments

  Review of Scientific Instruments 79 (1), 014101-, 2008-01-28

  American Institute of Physics

Details

• CRID: 1050282813971933696
• NII Article ID: 120000951999
• NII Book ID: AA00817730
• HANDLE: 2115/33047
• ISSN: 00346748
• Text Lang: en
• Article Type: journal article
• Data Source:
  • IRDB
  • CiNii Articles