Influence of Char Surface Chemistry on the Reduction of Nitric Oxide with Chars

Hiromi Yamashita, Akira Tomita, Hajime Yamada, Takashi Kyotani, Ljubisa R. Radovic

Research output: Contribution to journalArticle

168 Citations (Scopus)

Abstract

The reactions of brown coal chars with nitric oxide, oxygen, and their mixture were carried out at 300 °C. The copper-catalyzed char-NO reaction was remarkably enhanced by the presence of O2. The formation of reactive surface intermediates (C(O)) and stable carbon-oxygen complexes (C-O) during these reactions was investigated by the combination of transient kinetics and temperature-programmed desorption techniques. The majority of the carbon-oxygen complexes generated during the reactions were the stable C-O species. The concentration of reactive C(O) was increased by the presence of both O2 and Cu catalyst. To further investigate the influence of carbon surface chemistry, the reduction of NO was carried out with partially gasified char samples subjected to various surface treatments. A mechanism is proposed to account for the observed kinetic behavior.

Original languageEnglish (US)
Pages (from-to)85-89
Number of pages5
JournalEnergy and Fuels
Volume7
Issue number1
DOIs
StatePublished - Jan 1 1993

Fingerprint

Nitric oxide
Surface chemistry
Nitric Oxide
Carbon
Oxygen
Kinetics
Coal
Lignite
Temperature programmed desorption
Surface treatment
Copper
Catalysts

All Science Journal Classification (ASJC) codes

  • Chemical Engineering(all)
  • Fuel Technology
  • Energy Engineering and Power Technology

Cite this

Yamashita, Hiromi ; Tomita, Akira ; Yamada, Hajime ; Kyotani, Takashi ; Radovic, Ljubisa R. / Influence of Char Surface Chemistry on the Reduction of Nitric Oxide with Chars. In: Energy and Fuels. 1993 ; Vol. 7, No. 1. pp. 85-89.
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Influence of Char Surface Chemistry on the Reduction of Nitric Oxide with Chars. / Yamashita, Hiromi; Tomita, Akira; Yamada, Hajime; Kyotani, Takashi; Radovic, Ljubisa R.

In: Energy and Fuels, Vol. 7, No. 1, 01.01.1993, p. 85-89.

Research output: Contribution to journalArticle

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T1 - Influence of Char Surface Chemistry on the Reduction of Nitric Oxide with Chars

AU - Yamashita, Hiromi

AU - Tomita, Akira

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AU - Kyotani, Takashi

AU - Radovic, Ljubisa R.

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AB - The reactions of brown coal chars with nitric oxide, oxygen, and their mixture were carried out at 300 °C. The copper-catalyzed char-NO reaction was remarkably enhanced by the presence of O2. The formation of reactive surface intermediates (C(O)) and stable carbon-oxygen complexes (C-O) during these reactions was investigated by the combination of transient kinetics and temperature-programmed desorption techniques. The majority of the carbon-oxygen complexes generated during the reactions were the stable C-O species. The concentration of reactive C(O) was increased by the presence of both O2 and Cu catalyst. To further investigate the influence of carbon surface chemistry, the reduction of NO was carried out with partially gasified char samples subjected to various surface treatments. A mechanism is proposed to account for the observed kinetic behavior.

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