The study on the effect of the substitution of K2CO3 with Ca(OH)2 on kinetics on CO2-lignite coal gasification

Roosse Lee; Dong Hyun Heo; Jung Min Sohn

doi:10.1007/s11164-015-2367-9

The study on the effect of the substitution of K₂CO₃ with Ca(OH)₂ on kinetics on CO₂-lignite coal gasification

Roosse Lee
, Dong Hyun Heo
, Jung Min Sohn^*

^*Corresponding author for this work

Major of Mineral Resources and Energy Engineering

Jeonbuk National University

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

5 Scopus citations

Abstract

Three kinds of lignite were mixed with K₂CO₃ and Ca(OH)₂ and were gasified with CO₂ to investigate the effect that the addition of Ca(OH)₂ had on the gasification kinetics. K₂CO₃ and Ca(OH)₂ were impregnated and dried, their mixing ratio was varied, and the gasification experiments were conducted over a temperature range from 850 to 950 °C at atmospheric pressure. The modified volumetric reaction model was applied as the gas-solid reaction model to analyze the carbon conversion results and thus obtain the kinetic parameters. The results indicate that the catalytic activity based on carbon conversion followed the order of K₂CO₃ 5 wt% + Ca(OH)₂ 3 wt% > K₂CO₃ 8 wt% > K₂CO₃ 3 wt% + Ca(OH)₂ 5 wt% > K₂CO₃ 1 wt% + Ca(OH)₂ 7 wt%. The reaction rate was also influenced by the type of lignite, with a higher reactivity observed for Adaro lignite. The highest reaction rate constant was of 44.25 min^-1 with Adaro lignite and K₂CO₃ 5 wt% + Ca(OH)₂ 3 wt% at 950 °C. The lowest activation energy of 44.49 kJ/min was calculated for Mongolia lignite with K₂CO₃ 8 wt%. The reaction rate was enhanced by partly substituting K₂CO₃ with Ca(OH)₂, but further substitution resulted in a decrease in the reaction rate compared to that of K₂CO₃ alone.

Original language	English
Pages (from-to)	305-318
Number of pages	14
Journal	Research on Chemical Intermediates
Volume	42
Issue number	1
DOIs	https://doi.org/10.1007/s11164-015-2367-9
State	Published - 2016.01.1

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

SDG 13 Climate Action

Keywords

Activation energy
Ca(OH)
CO gasification
KCO
Lignite
Reaction rate

Quacquarelli Symonds(QS) Subject Topics

Chemistry

Access to Document

10.1007/s11164-015-2367-9

Cite this

@article{896d7eaada474f4a93e8de9e076abb78,

title = "The study on the effect of the substitution of K2CO3 with Ca(OH)2 on kinetics on CO2-lignite coal gasification",

abstract = "Three kinds of lignite were mixed with K2CO3 and Ca(OH)2 and were gasified with CO2 to investigate the effect that the addition of Ca(OH)2 had on the gasification kinetics. K2CO3 and Ca(OH)2 were impregnated and dried, their mixing ratio was varied, and the gasification experiments were conducted over a temperature range from 850 to 950 °C at atmospheric pressure. The modified volumetric reaction model was applied as the gas-solid reaction model to analyze the carbon conversion results and thus obtain the kinetic parameters. The results indicate that the catalytic activity based on carbon conversion followed the order of K2CO3 5 wt\% + Ca(OH)2 3 wt\% > K2CO3 8 wt\% > K2CO3 3 wt\% + Ca(OH)2 5 wt\% > K2CO3 1 wt\% + Ca(OH)2 7 wt\%. The reaction rate was also influenced by the type of lignite, with a higher reactivity observed for Adaro lignite. The highest reaction rate constant was of 44.25 min-1 with Adaro lignite and K2CO3 5 wt\% + Ca(OH)2 3 wt\% at 950 °C. The lowest activation energy of 44.49 kJ/min was calculated for Mongolia lignite with K2CO3 8 wt\%. The reaction rate was enhanced by partly substituting K2CO3 with Ca(OH)2, but further substitution resulted in a decrease in the reaction rate compared to that of K2CO3 alone.",

keywords = "Activation energy, Ca(OH), CO gasification, KCO, Lignite, Reaction rate",

author = "Roosse Lee and Heo, \{Dong Hyun\} and Sohn, \{Jung Min\}",

note = "Publisher Copyright: {\textcopyright} 2015 Springer Science+Business Media Dordrecht.",

year = "2016",

month = jan,

day = "1",

doi = "10.1007/s11164-015-2367-9",

language = "English",

volume = "42",

pages = "305--318",

journal = "Research on Chemical Intermediates",

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T1 - The study on the effect of the substitution of K2CO3 with Ca(OH)2 on kinetics on CO2-lignite coal gasification

AU - Lee, Roosse

AU - Heo, Dong Hyun

AU - Sohn, Jung Min

PY - 2016/1/1

Y1 - 2016/1/1

N2 - Three kinds of lignite were mixed with K2CO3 and Ca(OH)2 and were gasified with CO2 to investigate the effect that the addition of Ca(OH)2 had on the gasification kinetics. K2CO3 and Ca(OH)2 were impregnated and dried, their mixing ratio was varied, and the gasification experiments were conducted over a temperature range from 850 to 950 °C at atmospheric pressure. The modified volumetric reaction model was applied as the gas-solid reaction model to analyze the carbon conversion results and thus obtain the kinetic parameters. The results indicate that the catalytic activity based on carbon conversion followed the order of K2CO3 5 wt% + Ca(OH)2 3 wt% > K2CO3 8 wt% > K2CO3 3 wt% + Ca(OH)2 5 wt% > K2CO3 1 wt% + Ca(OH)2 7 wt%. The reaction rate was also influenced by the type of lignite, with a higher reactivity observed for Adaro lignite. The highest reaction rate constant was of 44.25 min-1 with Adaro lignite and K2CO3 5 wt% + Ca(OH)2 3 wt% at 950 °C. The lowest activation energy of 44.49 kJ/min was calculated for Mongolia lignite with K2CO3 8 wt%. The reaction rate was enhanced by partly substituting K2CO3 with Ca(OH)2, but further substitution resulted in a decrease in the reaction rate compared to that of K2CO3 alone.

AB - Three kinds of lignite were mixed with K2CO3 and Ca(OH)2 and were gasified with CO2 to investigate the effect that the addition of Ca(OH)2 had on the gasification kinetics. K2CO3 and Ca(OH)2 were impregnated and dried, their mixing ratio was varied, and the gasification experiments were conducted over a temperature range from 850 to 950 °C at atmospheric pressure. The modified volumetric reaction model was applied as the gas-solid reaction model to analyze the carbon conversion results and thus obtain the kinetic parameters. The results indicate that the catalytic activity based on carbon conversion followed the order of K2CO3 5 wt% + Ca(OH)2 3 wt% > K2CO3 8 wt% > K2CO3 3 wt% + Ca(OH)2 5 wt% > K2CO3 1 wt% + Ca(OH)2 7 wt%. The reaction rate was also influenced by the type of lignite, with a higher reactivity observed for Adaro lignite. The highest reaction rate constant was of 44.25 min-1 with Adaro lignite and K2CO3 5 wt% + Ca(OH)2 3 wt% at 950 °C. The lowest activation energy of 44.49 kJ/min was calculated for Mongolia lignite with K2CO3 8 wt%. The reaction rate was enhanced by partly substituting K2CO3 with Ca(OH)2, but further substitution resulted in a decrease in the reaction rate compared to that of K2CO3 alone.

KW - Activation energy

KW - Ca(OH)

KW - CO gasification

KW - KCO

KW - Lignite

KW - Reaction rate

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DO - 10.1007/s11164-015-2367-9

M3 - Journal article

AN - SCOPUS:84958105119

SN - 0922-6168

VL - 42

SP - 305

EP - 318

JO - Research on Chemical Intermediates

JF - Research on Chemical Intermediates

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