Catalytic activity of ZnS formed from desulfurization sorbent ZnO for conversion of COS to H2S

Eiji Sasaoka, Kazuo Taniguchi, Shigeru Hirano, Azhar Uddin, Shigeaki Kasaoka, Yusaku Sakata

Research output: Contribution to journalArticle

30 Citations (Scopus)

Abstract

In order to understand the behavior of COS in the ZnS zone of a packed bed high-temperature desulfurization reactor, the catalytic character of ZnS for the conversion of COS to H2S in the presence of gases which are composed of coal-derived gas was studied. ZnS was active for the catalytic hydrolysis of COS in simulated coal-derived gases; ZnS was also active for the hydrogenation of COS to H2S, but the activity was considerably lower than that for the hydrolysis of COS. In simulated coal-derived gases, ZnS was also active for the reverse reaction; H2S was converted to COS over ZnS. The water gas shift reaction did not proceed in parallel with hydrolysis of COS over ZnS. From the results of this work, it is suggested that if the contact time of COS with ZnS was sufficient, the equilibrium of the conversion of COS to H2S was controlled by the following reaction: 2COS + H2 + H2O ↔ 2H2S + CO + CO2.

Original languageEnglish
Pages (from-to)1102-1106
Number of pages5
JournalIndustrial and Engineering Chemistry Research
Volume34
Issue number4
Publication statusPublished - 1995

Fingerprint

Desulfurization
Sorbents
Coal
Catalyst activity
Gases
Hydrolysis
hydrolysis
gas
coal
Water gas shift
Packed beds
Carbon Monoxide
Hydrogenation
Temperature
water

ASJC Scopus subject areas

  • Polymers and Plastics
  • Environmental Science(all)
  • Chemical Engineering (miscellaneous)

Cite this

Catalytic activity of ZnS formed from desulfurization sorbent ZnO for conversion of COS to H2S. / Sasaoka, Eiji; Taniguchi, Kazuo; Hirano, Shigeru; Uddin, Azhar; Kasaoka, Shigeaki; Sakata, Yusaku.

In: Industrial and Engineering Chemistry Research, Vol. 34, No. 4, 1995, p. 1102-1106.

Research output: Contribution to journalArticle

Sasaoka, E, Taniguchi, K, Hirano, S, Uddin, A, Kasaoka, S & Sakata, Y 1995, 'Catalytic activity of ZnS formed from desulfurization sorbent ZnO for conversion of COS to H2S', Industrial and Engineering Chemistry Research, vol. 34, no. 4, pp. 1102-1106.
Sasaoka, Eiji ; Taniguchi, Kazuo ; Hirano, Shigeru ; Uddin, Azhar ; Kasaoka, Shigeaki ; Sakata, Yusaku. / Catalytic activity of ZnS formed from desulfurization sorbent ZnO for conversion of COS to H2S. In: Industrial and Engineering Chemistry Research. 1995 ; Vol. 34, No. 4. pp. 1102-1106.
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AU - Sasaoka, Eiji

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AU - Hirano, Shigeru

AU - Uddin, Azhar

AU - Kasaoka, Shigeaki

AU - Sakata, Yusaku

PY - 1995

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AB - In order to understand the behavior of COS in the ZnS zone of a packed bed high-temperature desulfurization reactor, the catalytic character of ZnS for the conversion of COS to H2S in the presence of gases which are composed of coal-derived gas was studied. ZnS was active for the catalytic hydrolysis of COS in simulated coal-derived gases; ZnS was also active for the hydrogenation of COS to H2S, but the activity was considerably lower than that for the hydrolysis of COS. In simulated coal-derived gases, ZnS was also active for the reverse reaction; H2S was converted to COS over ZnS. The water gas shift reaction did not proceed in parallel with hydrolysis of COS over ZnS. From the results of this work, it is suggested that if the contact time of COS with ZnS was sufficient, the equilibrium of the conversion of COS to H2S was controlled by the following reaction: 2COS + H2 + H2O ↔ 2H2S + CO + CO2.

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