Role of Water Vapor in Oxidative Decomposition of Calcium Sulfide

Shengji Wu; Md A. Uddin; Shinsuke Nagamine; Eiji Sasaoka

Role of Water Vapor in Oxidative Decomposition of Calcium Sulfide

Shengji Wu, Md A. Uddin, Shinsuke Nagamine, Eiji Sasaoka

Institute for Global Human Resource Development

Research output: Contribution to journal › Conference article

Abstract

In gasifiers of coal, decomposition of limestone into CaO and CO₂ depend on the concentration and pressure of CO₂ and the temperature. The basic characters of the oxidative decomposition of CaS were studied using reagent grade CaS to determine a method for perfect conversion of CaS formed from a natural lime to CaSO₄. The role of H₂O in the oxidative decomposition of CaS carried out using a flow-type thermogravimetric apparatus at 1 atm was studied. At 900°C, the presence of H₂O drastically accelerated the decomposition of CaS with O₂. CaS directly reacted with H₂O at 800°-1000°C and formed CaO, SO₂, and H₂. The evolution of SO₂ in the 10% H₂O-1% O₂-He system indicated that there is a synergistic effect of H₂O and O₂ on the oxidative decomposition of CaS. H₂O played an important role in the oxidative decomposition of CaS even if the O₂ concentration was high.

Original language	English
Pages (from-to)	405-406
Number of pages	2
Journal	ACS Division of Fuel Chemistry, Preprints
Volume	48
Issue number	1
Publication status	Published - Mar 1 2003
Event	Proceedings of the 2003 SPE/EPA/DOE Exploration Production Environmental Conference - San Antonio, TX, United States Duration: Mar 10 2003 → Mar 12 2003

ASJC Scopus subject areas

Energy(all)

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Wu, S., Uddin, M. A., Nagamine, S., & Sasaoka, E. (2003). Role of Water Vapor in Oxidative Decomposition of Calcium Sulfide. ACS Division of Fuel Chemistry, Preprints, 48(1), 405-406.

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title = "Role of Water Vapor in Oxidative Decomposition of Calcium Sulfide",

abstract = "In gasifiers of coal, decomposition of limestone into CaO and CO2 depend on the concentration and pressure of CO2 and the temperature. The basic characters of the oxidative decomposition of CaS were studied using reagent grade CaS to determine a method for perfect conversion of CaS formed from a natural lime to CaSO4. The role of H2O in the oxidative decomposition of CaS carried out using a flow-type thermogravimetric apparatus at 1 atm was studied. At 900°C, the presence of H2O drastically accelerated the decomposition of CaS with O2. CaS directly reacted with H2O at 800°-1000°C and formed CaO, SO2, and H2. The evolution of SO2 in the 10% H2O-1% O2-He system indicated that there is a synergistic effect of H2O and O2 on the oxidative decomposition of CaS. H2O played an important role in the oxidative decomposition of CaS even if the O2 concentration was high.",

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

year = "2003",

month = mar,

day = "1",

language = "English",

volume = "48",

pages = "405--406",

journal = "ACS Division of Fuel Chemistry, Preprints",

issn = "0569-3772",

number = "1",

note = "Proceedings of the 2003 SPE/EPA/DOE Exploration Production Environmental Conference ; Conference date: 10-03-2003 Through 12-03-2003",

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TY - JOUR

T1 - Role of Water Vapor in Oxidative Decomposition of Calcium Sulfide

AU - Wu, Shengji

AU - Uddin, Md A.

AU - Nagamine, Shinsuke

AU - Sasaoka, Eiji

PY - 2003/3/1

Y1 - 2003/3/1

N2 - In gasifiers of coal, decomposition of limestone into CaO and CO2 depend on the concentration and pressure of CO2 and the temperature. The basic characters of the oxidative decomposition of CaS were studied using reagent grade CaS to determine a method for perfect conversion of CaS formed from a natural lime to CaSO4. The role of H2O in the oxidative decomposition of CaS carried out using a flow-type thermogravimetric apparatus at 1 atm was studied. At 900°C, the presence of H2O drastically accelerated the decomposition of CaS with O2. CaS directly reacted with H2O at 800°-1000°C and formed CaO, SO2, and H2. The evolution of SO2 in the 10% H2O-1% O2-He system indicated that there is a synergistic effect of H2O and O2 on the oxidative decomposition of CaS. H2O played an important role in the oxidative decomposition of CaS even if the O2 concentration was high.

AB - In gasifiers of coal, decomposition of limestone into CaO and CO2 depend on the concentration and pressure of CO2 and the temperature. The basic characters of the oxidative decomposition of CaS were studied using reagent grade CaS to determine a method for perfect conversion of CaS formed from a natural lime to CaSO4. The role of H2O in the oxidative decomposition of CaS carried out using a flow-type thermogravimetric apparatus at 1 atm was studied. At 900°C, the presence of H2O drastically accelerated the decomposition of CaS with O2. CaS directly reacted with H2O at 800°-1000°C and formed CaO, SO2, and H2. The evolution of SO2 in the 10% H2O-1% O2-He system indicated that there is a synergistic effect of H2O and O2 on the oxidative decomposition of CaS. H2O played an important role in the oxidative decomposition of CaS even if the O2 concentration was high.

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M3 - Conference article

AN - SCOPUS:0344984408

VL - 48

SP - 405

EP - 406

JO - ACS Division of Fuel Chemistry, Preprints

JF - ACS Division of Fuel Chemistry, Preprints

SN - 0569-3772

IS - 1

T2 - Proceedings of the 2003 SPE/EPA/DOE Exploration Production Environmental Conference

Y2 - 10 March 2003 through 12 March 2003

ER -