Development of a reactive cell for Exafs in~situ studies of automotive postcombustion catalytic converters

Article type: Research Article

Authors: Schneider, S.^{; ;} | Bazin, D. | Dubuisson, J.M. | Ribbens, M. | Sonneville, H. | Meunier, G. | Garin, F. | Maire, G. | Dexpert, H.

Affiliations: LURE, bât 209 D, Université Paris-Sud, 91400 Orsay, France. | PSA, Centre Technique de Belchamp, 25420 Voujeacourt, France. | LERCSI, URA 1498 CNRS, 4 rue Blaise Pascal, 67070 Strasbourg, France. | LURE, bât 209 D, Université Paris-Sud, 91400 Orsay, France. | PSA, Centre Technique de Belchamp, 25420 Voujeacourt, France. | LERCSI, URA 1498 CNRS, 4 rue Blaise Pascal, 67070 Strasbourg, France. | CEMES-CNRS, BP 4347, 31055 Toulouse Cedex 04, France.

Note: [] Corresponding author: Tel.: +33 01 64468072; Fax: +33 01 64464148; E-mail: [email protected].

Abstract: This paper presents a new in situ X-ray reaction cell dedicated to in situ X-ray absorption studies of postcombustion catalytic converter. This device has been developed to collect Exafs spectra during the chemical reactions, the sample being placed under the flow of a complex mixture of reactive gases (NO, CO, N2,...). Particular attention has been paid to the material and the design of the sample holder. More precisely, a specific geometry of the sample holder has been elaborated in order to study directly the catalyst as it is in the converter. Also, we have tried here to respect the particular reaction conditions namely high temperature and high space velocity associated to postcombustion.

Keywords: New experimental device, furnace, in situ X-ray absorption spectroscopy, fluorescence mode, automotive postcombustion, catalytic converter

Journal: Journal of X-Ray Science and Technology, vol. 8, no. 4, pp. 221-230, 1998