Role of H2O in oxidative regeneration of ZnS formed from high-temperature desulfurization ZnO sorbent

E. Sasaoka, M. Hatori, N. Sada, Azhar Uddin

Research output: Contribution to journalArticle

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Abstract

To develop an easily regenerable zinc oxide high-temperature desulfurization sorbent, the role of H2O in the course of oxidative regeneration of zinc sulfide in the presence of O2 were studied using ZnO without support material as a sorbent. Oxidative regeneration of ZnS in the presence of water vapor was examined using TPR technique and H2 18O. From this study, the following results were obtained: ZnS was converted to SO2 and H2 by H2O in the absence of O2 at high temperature (> ca. 600 °C); in the first step in the oxidative regeneration, ZnS predominantly reacted with H2O more than O2; the SO2 formed from ZnS contained oxygen from H2O. From the experimental results, it was found that the oxidative regeneration of ZnS in the presence of H2O and O2 can be expressed by the following two equations: ZnS + 3H2O ⇆ ZnO + SO2 + 3H2; 3H2 + 3/2 O2 → 3H2O. In the absence of H2O or in the case of very low value of H2O/O2 concentration ratio, the following reaction also occurred: ZnS + 3/2 O2 → ZnO + SO2.

Original languageEnglish
Pages (from-to)3844-3848
Number of pages5
JournalIndustrial and Engineering Chemistry Research
Volume39
Issue number10
Publication statusPublished - Oct 2000

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Desulfurization
Sorbents
regeneration
Zinc Oxide
Zinc sulfide
Steam
Zinc oxide
Water vapor
zinc
Oxygen
Temperature
water vapor
sulfide
oxide
oxygen
zinc sulfide

ASJC Scopus subject areas

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

Cite this

Role of H2O in oxidative regeneration of ZnS formed from high-temperature desulfurization ZnO sorbent. / Sasaoka, E.; Hatori, M.; Sada, N.; Uddin, Azhar.

In: Industrial and Engineering Chemistry Research, Vol. 39, No. 10, 10.2000, p. 3844-3848.

Research output: Contribution to journalArticle

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AU - Uddin, Azhar

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