Role of water vapor in oxidative decomposition of calcium sulfide

Shengji Wu; Md Azhar Uddin; Shinsuke Nagamine; Eiji Sasaoka

doi:10.1016/j.fuel.2003.10.027

Role of water vapor in oxidative decomposition of calcium sulfide

Shengji Wu, Md Azhar Uddin, Shinsuke Nagamine, Eiji Sasaoka

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

23 Citations (Scopus)

Abstract

CaS formed from the CaO sorbent during desulfurization in coal gasifiers has to be converted to CaSO₄ before disposal. CaS is mainly decomposed to CaO and SO₂ by O₂ and then CaO is converted to CaSO₄ by SO₂ and O₂. The role of H ₂O in the oxidative decomposition of CaS with O₂ was studied using reagent grade CaS and H₂¹⁸O. The following results were obtained: (1) there is a synergistic effect of H₂O and O₂ on the oxidative decomposition of CaS to CaO and SO₂; (2) H₂O reacts with CaS to form CaO, SO₂ and H ₂ in the absence of O₂; (3) the oxidative decomposition of CaS to CaO and SO₂ occurs stepwise; (4) H₂O directly reacts with CaS in the presence of O₂; (5) H₂O plays an important role in the oxidative decomposition of CaS even if the O₂ concentration is high.

Original language	English
Pages (from-to)	671-677
Number of pages	7
Journal	Fuel
Volume	83
Issue number	6
DOIs	https://doi.org/10.1016/j.fuel.2003.10.027
Publication status	Published - Apr 2004
Externally published	Yes

Keywords

Calcium oxide
Calcium sulfide
Coal
Desulfurization
Oxidative decomposition
Water vapor

ASJC Scopus subject areas

Chemical Engineering(all)
Fuel Technology
Energy Engineering and Power Technology
Organic Chemistry

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10.1016/j.fuel.2003.10.027

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title = "Role of water vapor in oxidative decomposition of calcium sulfide",

abstract = "CaS formed from the CaO sorbent during desulfurization in coal gasifiers has to be converted to CaSO4 before disposal. CaS is mainly decomposed to CaO and SO2 by O2 and then CaO is converted to CaSO4 by SO2 and O2. The role of H 2O in the oxidative decomposition of CaS with O2 was studied using reagent grade CaS and H218O. The following results were obtained: (1) there is a synergistic effect of H2O and O2 on the oxidative decomposition of CaS to CaO and SO2; (2) H2O reacts with CaS to form CaO, SO2 and H 2 in the absence of O2; (3) the oxidative decomposition of CaS to CaO and SO2 occurs stepwise; (4) H2O directly reacts with CaS in the presence of O2; (5) H2O plays an important role in the oxidative decomposition of CaS even if the O2 concentration is high.",

keywords = "Calcium oxide, Calcium sulfide, Coal, Desulfurization, Oxidative decomposition, Water vapor",

author = "Shengji Wu and Uddin, {Md Azhar} and Shinsuke Nagamine and Eiji Sasaoka",

note = "Funding Information: This work was supported by the Ministry of Education, Science, Sport and Culture of Japan through the Grant-in-Aid on Priority-Area Research (Region No.737, Grant No.11218207).",

year = "2004",

month = apr,

doi = "10.1016/j.fuel.2003.10.027",

language = "English",

volume = "83",

pages = "671--677",

journal = "Fuel",

issn = "0016-2361",

publisher = "Elsevier BV",

number = "6",

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TY - JOUR

T1 - Role of water vapor in oxidative decomposition of calcium sulfide

AU - Wu, Shengji

AU - Uddin, Md Azhar

AU - Nagamine, Shinsuke

AU - Sasaoka, Eiji

N1 - Funding Information: This work was supported by the Ministry of Education, Science, Sport and Culture of Japan through the Grant-in-Aid on Priority-Area Research (Region No.737, Grant No.11218207).

PY - 2004/4

Y1 - 2004/4

N2 - CaS formed from the CaO sorbent during desulfurization in coal gasifiers has to be converted to CaSO4 before disposal. CaS is mainly decomposed to CaO and SO2 by O2 and then CaO is converted to CaSO4 by SO2 and O2. The role of H 2O in the oxidative decomposition of CaS with O2 was studied using reagent grade CaS and H218O. The following results were obtained: (1) there is a synergistic effect of H2O and O2 on the oxidative decomposition of CaS to CaO and SO2; (2) H2O reacts with CaS to form CaO, SO2 and H 2 in the absence of O2; (3) the oxidative decomposition of CaS to CaO and SO2 occurs stepwise; (4) H2O directly reacts with CaS in the presence of O2; (5) H2O plays an important role in the oxidative decomposition of CaS even if the O2 concentration is high.

AB - CaS formed from the CaO sorbent during desulfurization in coal gasifiers has to be converted to CaSO4 before disposal. CaS is mainly decomposed to CaO and SO2 by O2 and then CaO is converted to CaSO4 by SO2 and O2. The role of H 2O in the oxidative decomposition of CaS with O2 was studied using reagent grade CaS and H218O. The following results were obtained: (1) there is a synergistic effect of H2O and O2 on the oxidative decomposition of CaS to CaO and SO2; (2) H2O reacts with CaS to form CaO, SO2 and H 2 in the absence of O2; (3) the oxidative decomposition of CaS to CaO and SO2 occurs stepwise; (4) H2O directly reacts with CaS in the presence of O2; (5) H2O plays an important role in the oxidative decomposition of CaS even if the O2 concentration is high.

KW - Calcium oxide

KW - Calcium sulfide

KW - Coal

KW - Desulfurization

KW - Oxidative decomposition

KW - Water vapor

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DO - 10.1016/j.fuel.2003.10.027

M3 - Article

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SN - 0016-2361

VL - 83

SP - 671

EP - 677

JO - Fuel

JF - Fuel

IS - 6

ER -

Role of water vapor in oxidative decomposition of calcium sulfide

Abstract

Keywords

ASJC Scopus subject areas

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