Adsorption characteristics of CO2 and CH4 on dry and wet coal from subcritical to supercritical conditions

Hae Jung Kim, Yao Shi, Junwei He, Hyeon Hui Lee, Chang-Ha Lee

Research output: Contribution to journalArticle

41 Citations (Scopus)

Abstract

Enhanced coal bed methane (ECBM) recovery has been proposed as an attractive way to store captured CO2 while recovering CH4. The adsorption and desorption behaviors of CO2 and CH4 on dry and wet coal (anthracite) were studied at 318 and 338K and up to 150atm. The sorption capacity of CO2 and CH4 on anthracite coal was higher at lower temperatures and dry coal condition, but smaller than those on bituminous coals at a similar condition. In wet coal, the sorption capacity and stability of high pressure CO2 stored at 318K could be lower than those at 338K in the supercritical region because higher density of CO2 at 318K could lead to the structural change of wet coal. The difference in the excess adsorbed amount between dry and wet coal was only noticeable under the subcritical conditions at 338K but became more significant under the supercritical conditions with pressure at 318K. In dry and wet coal, the CO2 desorption isotherms had different shapes, depending on temperature, but all the CH4 desorption isotherms showed a weak positive hysteresis. The mutual solubility between the CO2-rich (or CH4-rich) phase and aqueous phase as well as coal swelling should be considered in evaluating the sorption capacity of a wet coal seam. Fluid density in free volume was the important variable to estimate the CO2 storage capacity or ECBM recovery because the density variation significantly influenced the isotherm shape.

Original languageEnglish
Pages (from-to)45-53
Number of pages9
JournalChemical Engineering Journal
Volume171
Issue number1
DOIs
Publication statusPublished - 2011 Jun 15

Fingerprint

Coal
coal
adsorption
Adsorption
coal seam
desorption
isotherm
anthracite
Isotherms
sorption
Sorption
Desorption
Anthracite
methane
bituminous coal
Recovery
Bituminous coal
hysteresis
Free volume
structural change

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Environmental Chemistry
  • Chemical Engineering(all)
  • Industrial and Manufacturing Engineering

Cite this

Kim, Hae Jung ; Shi, Yao ; He, Junwei ; Lee, Hyeon Hui ; Lee, Chang-Ha. / Adsorption characteristics of CO2 and CH4 on dry and wet coal from subcritical to supercritical conditions. In: Chemical Engineering Journal. 2011 ; Vol. 171, No. 1. pp. 45-53.
@article{71172551d0c045ec83755ff323af1caa,
title = "Adsorption characteristics of CO2 and CH4 on dry and wet coal from subcritical to supercritical conditions",
abstract = "Enhanced coal bed methane (ECBM) recovery has been proposed as an attractive way to store captured CO2 while recovering CH4. The adsorption and desorption behaviors of CO2 and CH4 on dry and wet coal (anthracite) were studied at 318 and 338K and up to 150atm. The sorption capacity of CO2 and CH4 on anthracite coal was higher at lower temperatures and dry coal condition, but smaller than those on bituminous coals at a similar condition. In wet coal, the sorption capacity and stability of high pressure CO2 stored at 318K could be lower than those at 338K in the supercritical region because higher density of CO2 at 318K could lead to the structural change of wet coal. The difference in the excess adsorbed amount between dry and wet coal was only noticeable under the subcritical conditions at 338K but became more significant under the supercritical conditions with pressure at 318K. In dry and wet coal, the CO2 desorption isotherms had different shapes, depending on temperature, but all the CH4 desorption isotherms showed a weak positive hysteresis. The mutual solubility between the CO2-rich (or CH4-rich) phase and aqueous phase as well as coal swelling should be considered in evaluating the sorption capacity of a wet coal seam. Fluid density in free volume was the important variable to estimate the CO2 storage capacity or ECBM recovery because the density variation significantly influenced the isotherm shape.",
author = "Kim, {Hae Jung} and Yao Shi and Junwei He and Lee, {Hyeon Hui} and Chang-Ha Lee",
year = "2011",
month = "6",
day = "15",
doi = "10.1016/j.cej.2011.03.035",
language = "English",
volume = "171",
pages = "45--53",
journal = "Chemical Engineering Journal",
issn = "1385-8947",
publisher = "Elsevier",
number = "1",

}

Adsorption characteristics of CO2 and CH4 on dry and wet coal from subcritical to supercritical conditions. / Kim, Hae Jung; Shi, Yao; He, Junwei; Lee, Hyeon Hui; Lee, Chang-Ha.

In: Chemical Engineering Journal, Vol. 171, No. 1, 15.06.2011, p. 45-53.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Adsorption characteristics of CO2 and CH4 on dry and wet coal from subcritical to supercritical conditions

AU - Kim, Hae Jung

AU - Shi, Yao

AU - He, Junwei

AU - Lee, Hyeon Hui

AU - Lee, Chang-Ha

PY - 2011/6/15

Y1 - 2011/6/15

N2 - Enhanced coal bed methane (ECBM) recovery has been proposed as an attractive way to store captured CO2 while recovering CH4. The adsorption and desorption behaviors of CO2 and CH4 on dry and wet coal (anthracite) were studied at 318 and 338K and up to 150atm. The sorption capacity of CO2 and CH4 on anthracite coal was higher at lower temperatures and dry coal condition, but smaller than those on bituminous coals at a similar condition. In wet coal, the sorption capacity and stability of high pressure CO2 stored at 318K could be lower than those at 338K in the supercritical region because higher density of CO2 at 318K could lead to the structural change of wet coal. The difference in the excess adsorbed amount between dry and wet coal was only noticeable under the subcritical conditions at 338K but became more significant under the supercritical conditions with pressure at 318K. In dry and wet coal, the CO2 desorption isotherms had different shapes, depending on temperature, but all the CH4 desorption isotherms showed a weak positive hysteresis. The mutual solubility between the CO2-rich (or CH4-rich) phase and aqueous phase as well as coal swelling should be considered in evaluating the sorption capacity of a wet coal seam. Fluid density in free volume was the important variable to estimate the CO2 storage capacity or ECBM recovery because the density variation significantly influenced the isotherm shape.

AB - Enhanced coal bed methane (ECBM) recovery has been proposed as an attractive way to store captured CO2 while recovering CH4. The adsorption and desorption behaviors of CO2 and CH4 on dry and wet coal (anthracite) were studied at 318 and 338K and up to 150atm. The sorption capacity of CO2 and CH4 on anthracite coal was higher at lower temperatures and dry coal condition, but smaller than those on bituminous coals at a similar condition. In wet coal, the sorption capacity and stability of high pressure CO2 stored at 318K could be lower than those at 338K in the supercritical region because higher density of CO2 at 318K could lead to the structural change of wet coal. The difference in the excess adsorbed amount between dry and wet coal was only noticeable under the subcritical conditions at 338K but became more significant under the supercritical conditions with pressure at 318K. In dry and wet coal, the CO2 desorption isotherms had different shapes, depending on temperature, but all the CH4 desorption isotherms showed a weak positive hysteresis. The mutual solubility between the CO2-rich (or CH4-rich) phase and aqueous phase as well as coal swelling should be considered in evaluating the sorption capacity of a wet coal seam. Fluid density in free volume was the important variable to estimate the CO2 storage capacity or ECBM recovery because the density variation significantly influenced the isotherm shape.

UR - http://www.scopus.com/inward/record.url?scp=79957605414&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=79957605414&partnerID=8YFLogxK

U2 - 10.1016/j.cej.2011.03.035

DO - 10.1016/j.cej.2011.03.035

M3 - Article

VL - 171

SP - 45

EP - 53

JO - Chemical Engineering Journal

JF - Chemical Engineering Journal

SN - 1385-8947

IS - 1

ER -