Hydrogenation of m-dinitrobenzene to m-phenylenediamine over La2O3-promoted Ni/SiO2 catalysts

Yingxin Liu, Zuojun Wei, Shuguang Deng, Jiyan Zhang

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

Background: Liquid-phase catalytic hydrogenation of m-dinitrobenzene is an environmentally friendly routine for m-phenylenediamine production. The key to increasing product yield is to develop catalysts with high catalytic performance. In this work, La2O3-modified Ni/SiO2 catalysts were prepared and applied to the hydrogenation of m-dinitrobenzene to m-phenylenediamine. The effect of La2O3 loading on the properties of Ni/SiO2 was investigated. The reaction kinetic study was performed in ethanol over Ni/3%La2O3-SiO2 catalyst, in order to clarify the reaction mechanism of m-dinitrobenzene hydrogenation. Results: It was found that the activity of the silica supported nickel catalysts is obviously influenced by La2O3 loading. Ni/3%La2O3-SiO2 catalyst exhibits high activity owing to its well dispersed nickel species,with conversion of m-dinitrobenzene and yield of m-phenylenediamine up to 97.1% and 94%, respectively. The results also show that Ni/3%La2O3-SiO2 catalyst can be reused at least six times without significant loss of activity. Conclusion: La2O3 shows strong promotion of the effect of Ni/SiO2 catalyst for liquid-phase hydrogenation of m-dinitrobenzene. La2O3 loading can affect the properties of Ni/SiO2 catalyst. Based on the study of m-dinitrobenzene hydrogenation kinetics over Ni/3%La2O3-SiO2 catalyst, a possible reaction mechanism is proposed.

Original languageEnglish (US)
Pages (from-to)1381-1389
Number of pages9
JournalJournal of Chemical Technology and Biotechnology
Volume84
Issue number9
DOIs
StatePublished - 2009
Externally publishedYes

Fingerprint

Hydrogenation
catalyst
Catalysts
Nickel
nickel
Silicon Dioxide
3-phenylenediamine
3-dinitrobenzene
liquid
Ethanol
Liquids
reaction kinetics
Reaction kinetics
ethanol
silica
Silica
kinetics
Kinetics

Keywords

  • Hydrogenation
  • Lanthanum oxide
  • M-dinitrobenzene
  • M-phenylenediamine
  • Ni/SiO catalyst

ASJC Scopus subject areas

  • Inorganic Chemistry
  • Waste Management and Disposal
  • Pollution
  • Organic Chemistry
  • Renewable Energy, Sustainability and the Environment
  • Biotechnology
  • Chemical Engineering(all)
  • Fuel Technology

Cite this

Hydrogenation of m-dinitrobenzene to m-phenylenediamine over La2O3-promoted Ni/SiO2 catalysts. / Liu, Yingxin; Wei, Zuojun; Deng, Shuguang; Zhang, Jiyan.

In: Journal of Chemical Technology and Biotechnology, Vol. 84, No. 9, 2009, p. 1381-1389.

Research output: Contribution to journalArticle

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title = "Hydrogenation of m-dinitrobenzene to m-phenylenediamine over La2O3-promoted Ni/SiO2 catalysts",
abstract = "Background: Liquid-phase catalytic hydrogenation of m-dinitrobenzene is an environmentally friendly routine for m-phenylenediamine production. The key to increasing product yield is to develop catalysts with high catalytic performance. In this work, La2O3-modified Ni/SiO2 catalysts were prepared and applied to the hydrogenation of m-dinitrobenzene to m-phenylenediamine. The effect of La2O3 loading on the properties of Ni/SiO2 was investigated. The reaction kinetic study was performed in ethanol over Ni/3{\%}La2O3-SiO2 catalyst, in order to clarify the reaction mechanism of m-dinitrobenzene hydrogenation. Results: It was found that the activity of the silica supported nickel catalysts is obviously influenced by La2O3 loading. Ni/3{\%}La2O3-SiO2 catalyst exhibits high activity owing to its well dispersed nickel species,with conversion of m-dinitrobenzene and yield of m-phenylenediamine up to 97.1{\%} and 94{\%}, respectively. The results also show that Ni/3{\%}La2O3-SiO2 catalyst can be reused at least six times without significant loss of activity. Conclusion: La2O3 shows strong promotion of the effect of Ni/SiO2 catalyst for liquid-phase hydrogenation of m-dinitrobenzene. La2O3 loading can affect the properties of Ni/SiO2 catalyst. Based on the study of m-dinitrobenzene hydrogenation kinetics over Ni/3{\%}La2O3-SiO2 catalyst, a possible reaction mechanism is proposed.",
keywords = "Hydrogenation, Lanthanum oxide, M-dinitrobenzene, M-phenylenediamine, Ni/SiO catalyst",
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T1 - Hydrogenation of m-dinitrobenzene to m-phenylenediamine over La2O3-promoted Ni/SiO2 catalysts

AU - Liu, Yingxin

AU - Wei, Zuojun

AU - Deng, Shuguang

AU - Zhang, Jiyan

PY - 2009

Y1 - 2009

N2 - Background: Liquid-phase catalytic hydrogenation of m-dinitrobenzene is an environmentally friendly routine for m-phenylenediamine production. The key to increasing product yield is to develop catalysts with high catalytic performance. In this work, La2O3-modified Ni/SiO2 catalysts were prepared and applied to the hydrogenation of m-dinitrobenzene to m-phenylenediamine. The effect of La2O3 loading on the properties of Ni/SiO2 was investigated. The reaction kinetic study was performed in ethanol over Ni/3%La2O3-SiO2 catalyst, in order to clarify the reaction mechanism of m-dinitrobenzene hydrogenation. Results: It was found that the activity of the silica supported nickel catalysts is obviously influenced by La2O3 loading. Ni/3%La2O3-SiO2 catalyst exhibits high activity owing to its well dispersed nickel species,with conversion of m-dinitrobenzene and yield of m-phenylenediamine up to 97.1% and 94%, respectively. The results also show that Ni/3%La2O3-SiO2 catalyst can be reused at least six times without significant loss of activity. Conclusion: La2O3 shows strong promotion of the effect of Ni/SiO2 catalyst for liquid-phase hydrogenation of m-dinitrobenzene. La2O3 loading can affect the properties of Ni/SiO2 catalyst. Based on the study of m-dinitrobenzene hydrogenation kinetics over Ni/3%La2O3-SiO2 catalyst, a possible reaction mechanism is proposed.

AB - Background: Liquid-phase catalytic hydrogenation of m-dinitrobenzene is an environmentally friendly routine for m-phenylenediamine production. The key to increasing product yield is to develop catalysts with high catalytic performance. In this work, La2O3-modified Ni/SiO2 catalysts were prepared and applied to the hydrogenation of m-dinitrobenzene to m-phenylenediamine. The effect of La2O3 loading on the properties of Ni/SiO2 was investigated. The reaction kinetic study was performed in ethanol over Ni/3%La2O3-SiO2 catalyst, in order to clarify the reaction mechanism of m-dinitrobenzene hydrogenation. Results: It was found that the activity of the silica supported nickel catalysts is obviously influenced by La2O3 loading. Ni/3%La2O3-SiO2 catalyst exhibits high activity owing to its well dispersed nickel species,with conversion of m-dinitrobenzene and yield of m-phenylenediamine up to 97.1% and 94%, respectively. The results also show that Ni/3%La2O3-SiO2 catalyst can be reused at least six times without significant loss of activity. Conclusion: La2O3 shows strong promotion of the effect of Ni/SiO2 catalyst for liquid-phase hydrogenation of m-dinitrobenzene. La2O3 loading can affect the properties of Ni/SiO2 catalyst. Based on the study of m-dinitrobenzene hydrogenation kinetics over Ni/3%La2O3-SiO2 catalyst, a possible reaction mechanism is proposed.

KW - Hydrogenation

KW - Lanthanum oxide

KW - M-dinitrobenzene

KW - M-phenylenediamine

KW - Ni/SiO catalyst

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