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EXAFS Study on Structural Change of Charcoal-supported Ruthenium Catalysts during Lignin Gasification in Supercritical Water

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Abstract

Lignin gasification in supercritical water over charcoal supported ruthenium trivalent salts was studied using a batch reactor at 673 K. Ruthenium (III) nitrosyl nitrate on charcoal (Ru(NO)(NO3)3/C) was more active than ruthenium (III) chloride on charcoal (RuCl3/C) for the gasification reaction. EXAFS analysis revealed that ruthenium metal particles were formed in both RuCl3/C and Ru(NO)(NO3)3/C catalysts during the lignin gasification and that the size of ruthenium metal in Ru(NO)(NO3)3/C was smaller than that in RuCl3/C. It was concluded that well-dispersed ruthenium metal particles were active for the lignin gasification in supercritical water.

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Acknowledgments

EXAFS measurements were done by the approval of the PAC committee (proposal No: 2006G324).

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Authors and Affiliations

  1. Research Center for Compact Chemical Process, National Institute of Advanced Industrial Science and Technology (AIST), 4-2-1 Nigatake, Miyaginoku, Sendai, 983-8551, Japan

    Aritomo Yamaguchi, Norihito Hiyoshi, Osamu Sato & Masayuki Shirai

  2. Department of Chemical Engineering, Ichinoseki National College of Technology, Takanashi, Hagisho, Ichinoseki, Iwate, 021-8511, Japan

    Mitsumasa Osada

Authors
  1. Aritomo Yamaguchi
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  2. Norihito Hiyoshi
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  3. Osamu Sato
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  4. Mitsumasa Osada
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  5. Masayuki Shirai
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Corresponding author

Correspondence to Masayuki Shirai.

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Yamaguchi, A., Hiyoshi, N., Sato, O. et al. EXAFS Study on Structural Change of Charcoal-supported Ruthenium Catalysts during Lignin Gasification in Supercritical Water. Catal Lett 122, 188–195 (2008). https://doi.org/10.1007/s10562-007-9368-2

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  • DOI: https://doi.org/10.1007/s10562-007-9368-2

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