Electrochemical reduction of NOx - DTU Orbit

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Cover: La0.85Sr0.15MnO3-δ-Ce0.9Gd0.1O1.95 electrode of a porous 11-layer cell stack impregnated with BaO. On this kind of electrode 60% NOx conversion was achieved in a gas composition of 1000 ppm NO + 10% O2 at 400 °C. The image to the left shows the electrode microstructure before test and the image to the right the microstructure after test.
Preface Preface This thesis is submitted to the Technical University of Denmark to finalise the PhD study Electrochemical Reduction of NOx which was carried out from 1 st May 2009 to 30 th April 2012. The PhD study was financed by the Danish Strategic Research Council under contract no. 09-065186. The project was hosted by the Fuel Cell and Solid State Chemistry Division at Risø DTU, which due to organisational changes became part of the newly established Department of Energy Conversion and Storage at Technical University of Denmark from the 1 st January 2012. These organisational changes had no influence on the accomplishment of the PhD project. The PhD project was supervised by senior scientist Kent Kammer Hansen and the daily work was carried out in the Gas Purification Work Group. After three years of PhD studies I owe thanks to many colleagues, who have been a great help during the project. This help has been greatly appreciated and invaluable for the completion of the project. Especially I would like to thank: − my supervisor Kent Kammer Hansen for patient encouragement during the project and for giving me time and space to grow as a researcher. − the entire Gas Purification Work Group for being excellent colleagues both during work and during relaxed lunch conversations. − the technical staff, who many times have helped me solving both predicted and unpredicted practical issues. Marie Lund Traulsen, Roskilde, Denmark, April 2012 i
Page 1: Department of Energy Conversion and
Page 5 and 6: Dansk resumé Dansk resumé NOx er
Page 7 and 8: Table of Contents 5.3 Experimental
Page 9 and 10: 1 Introduction 1 Introduction NOx i
Page 11 and 12: 1 Introduction 3, 12 Table 1. Emiss
Page 13 and 14: O 1 Introduction 2 2 NOx storage: N
Page 15 and 16: 1 Introduction the electrode materi
Page 17 and 18: 1 Introduction The main focus of th
Page 19 and 20: 2 Materials 2 Materials In this pro
Page 21 and 22: 2 Materials used promoter in conven
Page 23 and 24: 2.4 Material properties 2 Materials
Page 25 and 26: 3 Experimental Figure 1. Symmetric
Page 27 and 28: 3.2 Fabrication of electrodes 3 Exp
Page 29 and 30: 3 Experimental 3) Covering the cell
Page 31 and 32: 3 Experimental NO2* which decays to
Page 33 and 34: 4 DRIFT study of NOx adsorption on
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4 DRIFT study of NOx adsorption on
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4.5 Conclusions 4 DRIFT study of NO
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5 Improvement of LSM15-CGO10 electr
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6 NOx-conversion on Porous LSF15-CG
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7.1.3 SEM 7 NOx-conversion on LSF15
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7 NOx-conversion on LSF15-CGO10 cel
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8 NOx-conversion on LSM15-CGO10 cel
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8.5 Discussion 8 NOx-conversion on
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8.6 Conclusion 8 NOx-conversion on
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9.4 Conclusion 9 NOx-conversion on
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10 Measurements on LSM15-CGO10 elec
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11 Construction of an in situ XANES
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11.3 Experimental 11.3.1 Design of
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11.4 Results 11.4.1 Impedance measu
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11.4.2 XANES 11 Construction of an
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12 Overall Discussion, Conclusion a
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12.3 Outlook 12 Overall Discussion,
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References References 1 G. Rayner-C
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26 T. Hibino, Chem. Lett., 1994, 5,
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50 S. P. Jiang, J. Mater. Sci., 200
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References 73 T. J. Toops, D. B. Sm
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References 98 G. W. Coffey, J. Hard
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References 123 A. Laachir, V. Perri
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References 147 C. Lu, T. Z. Sholkla
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References 171 K. Adams, J. Cavatai
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Appendix A Appendix A The article
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temperature and in the presence of
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Table 1 Energy intervals and step s
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Figure 5 Impedance spectra, Nyquist
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Knibbe, R., Hauch, A., Hjelm, J., E
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Electrochemical reduction of NOx - DTU Orbit

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