Catalytic Hydrogenation of Nitrate in Water Using a Pd–Cu/Al2O3 Catalyst and Dilute H2 Microbubbles

Norio Nakayama, Takahashi Masayoshi

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)


Abstract: The catalytic hydrogenation of nitrate was performed in solutions containing 20 mg/dm3(Formula presented.) using a Pd–Cu/Al2O3 catalyst (synthesized with a Cu/Pd ratio of 0.25) together with microbubbles (radii <50 μm) of 9.4–43.7 % H2 in N2. Significant enhancement of the hydrogenation rate was observed due to the application of the microbubbles. The nitrate conversion factors for microbubble hydrogenation were approximately 1.7–3.8 times greater than those obtained using conventional macrobubbles (radii >1500 μm). The application of microbubbles was also effective during hydrogenation in a more concentrated nitrate solution containing 77 mg/dm3(Formula presented.). Graphical Abstract: [Figure not available: see fulltext.]

Original languageEnglish
JournalCatalysis Letters
Issue number9
Publication statusPublished - 2015 Jul 7
Externally publishedYes


  • Catalysis
  • Catalyst
  • Hydrogen
  • Hydrogenation
  • Microbubble
  • Nitrate

ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)


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