Re-carbonation of calcined limestone under oxy-circulating fluidized bed combustion conditions

Ye Bin Kim; You Ra Gwak; Sang In Keel; Jin Han Yun; See Hoon Lee

doi:10.9713/kcer.2018.56.6.856

Re-carbonation of calcined limestone under oxy-circulating fluidized bed combustion conditions

Ye Bin Kim
, You Ra Gwak
, Sang In Keel
, Jin Han Yun
, See Hoon Lee^*

^*Corresponding author for this work

Major of Mineral Resources and Energy Engineering

Jeonbuk National University
Korea Institute of Machinery and Materials

Research output: Contribution to journal › Journal article › peer-review

3 Scopus citations

Abstract

In order to investigate the re-carbonation behaviors of limestones in an oxy-circulating fluidized bed com-bustor (Oxy-CFBC), the re-carbonation characteristics of domestic 4 different limestone samples were analyzed in a thermogravimetric analyzer (TGA-N1000) with the higher concentration of CO₂. Effect of reaction temperature (600~900 ^oC) and CaCO₃ content (77~95%) of limestones were determined and the mass change of the CaO was observed. Under the temperature of 800 ^oC, the conversion rate increased with increasing reaction temperature. However, the conversion rate decreased with increasing reaction temperature over 800 ^oC. In the case of CaCO₃ content, the conversion was remarkably different at 870 ^oC. In addition, reaction rate equations for simulating the re-carbonation of limestone by using gas solid reaction models were proposed in this study.

Original language	English
Pages (from-to)	856-863
Number of pages	8
Journal	Korean Chemical Engineering Research
Volume	56
Issue number	6
DOIs	https://doi.org/10.9713/kcer.2018.56.6.856
State	Published - 2018.12

Keywords

Kinetics
Limestone
Oxy-fuel combustion
Re-carbornation
TGA

Quacquarelli Symonds(QS) Subject Topics

Engineering - Chemical

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10.9713/kcer.2018.56.6.856

Cite this

@article{59b9951110164fe8bf7ccd755b6bc7d9,

title = "Re-carbonation of calcined limestone under oxy-circulating fluidized bed combustion conditions",

abstract = "In order to investigate the re-carbonation behaviors of limestones in an oxy-circulating fluidized bed com-bustor (Oxy-CFBC), the re-carbonation characteristics of domestic 4 different limestone samples were analyzed in a thermogravimetric analyzer (TGA-N1000) with the higher concentration of CO2. Effect of reaction temperature (600\textasciitilde{}900 oC) and CaCO3 content (77\textasciitilde{}95\%) of limestones were determined and the mass change of the CaO was observed. Under the temperature of 800 oC, the conversion rate increased with increasing reaction temperature. However, the conversion rate decreased with increasing reaction temperature over 800 oC. In the case of CaCO3 content, the conversion was remarkably different at 870 oC. In addition, reaction rate equations for simulating the re-carbonation of limestone by using gas solid reaction models were proposed in this study.",

keywords = "Kinetics, Limestone, Oxy-fuel combustion, Re-carbornation, TGA",

author = "Kim, \{Ye Bin\} and Gwak, \{You Ra\} and Keel, \{Sang In\} and Yun, \{Jin Han\} and Lee, \{See Hoon\}",

year = "2018",

month = dec,

doi = "10.9713/kcer.2018.56.6.856",

language = "English",

volume = "56",

pages = "856--863",

journal = "Korean Chemical Engineering Research",

issn = "0304-128X",

number = "6",

}

TY - JOUR

T1 - Re-carbonation of calcined limestone under oxy-circulating fluidized bed combustion conditions

AU - Kim, Ye Bin

AU - Gwak, You Ra

AU - Keel, Sang In

AU - Yun, Jin Han

AU - Lee, See Hoon

PY - 2018/12

Y1 - 2018/12

N2 - In order to investigate the re-carbonation behaviors of limestones in an oxy-circulating fluidized bed com-bustor (Oxy-CFBC), the re-carbonation characteristics of domestic 4 different limestone samples were analyzed in a thermogravimetric analyzer (TGA-N1000) with the higher concentration of CO2. Effect of reaction temperature (600~900 oC) and CaCO3 content (77~95%) of limestones were determined and the mass change of the CaO was observed. Under the temperature of 800 oC, the conversion rate increased with increasing reaction temperature. However, the conversion rate decreased with increasing reaction temperature over 800 oC. In the case of CaCO3 content, the conversion was remarkably different at 870 oC. In addition, reaction rate equations for simulating the re-carbonation of limestone by using gas solid reaction models were proposed in this study.

AB - In order to investigate the re-carbonation behaviors of limestones in an oxy-circulating fluidized bed com-bustor (Oxy-CFBC), the re-carbonation characteristics of domestic 4 different limestone samples were analyzed in a thermogravimetric analyzer (TGA-N1000) with the higher concentration of CO2. Effect of reaction temperature (600~900 oC) and CaCO3 content (77~95%) of limestones were determined and the mass change of the CaO was observed. Under the temperature of 800 oC, the conversion rate increased with increasing reaction temperature. However, the conversion rate decreased with increasing reaction temperature over 800 oC. In the case of CaCO3 content, the conversion was remarkably different at 870 oC. In addition, reaction rate equations for simulating the re-carbonation of limestone by using gas solid reaction models were proposed in this study.

KW - Kinetics

KW - Limestone

KW - Oxy-fuel combustion

KW - Re-carbornation

KW - TGA

UR - https://www.scopus.com/pages/publications/85057713435

U2 - 10.9713/kcer.2018.56.6.856

DO - 10.9713/kcer.2018.56.6.856

M3 - Journal article

AN - SCOPUS:85057713435

SN - 0304-128X

VL - 56

SP - 856

EP - 863

JO - Korean Chemical Engineering Research

JF - Korean Chemical Engineering Research

IS - 6

ER -

Re-carbonation of calcined limestone under oxy-circulating fluidized bed combustion conditions

Abstract

Keywords

Quacquarelli Symonds(QS) Subject Topics

Access to Document

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