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

Norio Nakayama; Takahashi Masayoshi

doi:10.1007/s10562-015-1569-5

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

Norio Nakayama, Takahashi Masayoshi

Research output: Contribution to journal › Article › peer-review

6 Citations (Scopus)

Abstract

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 language	English
Journal	Catalysis Letters
Volume	145
Issue number	9
DOIs	https://doi.org/10.1007/s10562-015-1569-5
Publication status	Published - 2015 Jul 7
Externally published	Yes

Keywords

Catalysis
Catalyst
Hydrogen
Hydrogenation
Microbubble
Nitrate

ASJC Scopus subject areas

Catalysis
Chemistry(all)

Access to Document

10.1007/s10562-015-1569-5

Cite this

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

abstract = "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.]",

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T1 - Catalytic Hydrogenation of Nitrate in Water Using a Pd–Cu/Al2O3 Catalyst and Dilute H2 Microbubbles

AU - Nakayama, Norio

AU - Masayoshi, Takahashi

PY - 2015/7/7

Y1 - 2015/7/7

N2 - 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.]

AB - 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.]

KW - Catalysis

KW - Catalyst

KW - Hydrogen

KW - Hydrogenation

KW - Microbubble

KW - Nitrate

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