Highly active copper catalyst for low-temperature water-gas shift reaction prepared via a Cu-Mn spinel oxide precursor

Authors:  T. Tabakova, V. Idakiev, G. Avgouropoulos, J. Papavasiliou, M. Manzoli, F. Boccuzzi, T. Ioannides

Abstract:
The effect of preparation method on structural properties and activity of Cu-Mn spinel oxide catalysts for the low-temperature water-gas shift reaction (LT-WGSR) has been studied. Single-step urea-combustion and coprecipitationprocedures were used for synthesis ofthe catalysts. Catalyst characterization was performed by N₂ physisorption, XRD, HRTEM, CO-TPR, CO-TPD and FTIR spectroscopy. The WGS activity was evaluated in a conventional flow reactor in the temperature range of 140–240 ^◦C. The influence of reaction gas mixture, including either idealized or realistic reformate, H₂O/CO ratio and contact time on activity were investigated. The catalytic activity tests carried out with both idealized and realistic reformate demonstrated the superior performance of the catalyst prepared by the single-step urea-combustion method. Moreover, comparison of the WGS activity of these catalysts with the one of a commercial CuOZnO-Al₂O₃ catalyst points out the potential application of Cu-Mn spinel oxide catalysts in LT-WGSR. The results revealed that the urea-combustion synthesis method is more appropriate than coprecipitation for the preparation of active and stable Cu-Mn spinel oxide catalysts for LT-WGSR.

Keywords:
Cu-Mn spinel oxide
Preparation
Urea combustion
WGSR
HRTEM

Published in: Applied catalysis A: General  (Volume 451, Pages 1-288, 31 January 2013)

Publisher: Elsevier

ISSN Information: 0926-860X

Highly active copper catalyst for low-temperature water-gas shift reaction prepared via a Cu-Mn spinel oxide precursor

Bình luận của bạn

*

*

*

*

 Captcha

Gửi bình luận nhập lại