Adsorption behavior of carbon dioxide and methane in bituminous coal: A molecular simulation study

You, Jianxin; Tian, Liang; Zhang, Chao; Yao, Hongxing; Wu, Dou; Fan, Bojiang; Hu, Songqing

doi:10.1016/j.cjche.2016.05.008

Cited by 68 publications

(79 citation statements)

References 32 publications

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“…Investigation about the adsorption performances of CH 4 and CO 2 on coal could provide useful information to understand the adsorption mechanisms of CH 4 and CO 2 and verify the feasibility of the technology of CO 2 -ECBM. To date, many studies have addressed the adsorption behaviors of CH 4 and CO 2 on different rank coals by the means of laboratory experiment and numerical simulation analysis [2,[8][9][10][11][12][13][14][15][16][17]. Their results indicate that the adsorption amount and adsorption rate of CO 2 on coal are larger than those of CH 4 [2,13,16].…”

Section: Introductionmentioning

confidence: 99%

“…To date, many studies have addressed the adsorption behaviors of CH 4 and CO 2 on different rank coals by the means of laboratory experiment and numerical simulation analysis [2,[8][9][10][11][12][13][14][15][16][17]. Their results indicate that the adsorption amount and adsorption rate of CO 2 on coal are larger than those of CH 4 [2,13,16]. The adsorption abilities of CH 4 and CO 2 on coal are tightly related to the reservoir condition (pressure, temperature, and effective stress) and the physical-chemical property of coal (mineral composition, total organic carbon content, ash content, pore structure, surface functional group, and moisture content) [8-12, 14, 16, 17].…”

Section: Introductionmentioning

confidence: 99%

“…Various adsorption models including the Langmuir model, Brunauer-Emmett-Teller (BET) model, and pore-filling model are capable of dealing with the adsorption data of CH 4 and CO 2 on coal [2,14,15,17,18]. The values of selectivity factor of CO 2 over CH 4 , which is a key indicator to assess the displacement efficiency of CO 2 , are all higher than one on different rank coals [8,13,[15][16][17][18].…”

Section: Introductionmentioning

confidence: 99%

“…There are also some studies on the thermodynamic behaviors of CH 4 and CO 2 on coal [13,14,23,24]. Busch and Gensterblum [14] revealed that the isosteric adsorption heats of CH 4 and CO 2 on coal both gradually reduce with the increase of moisture content.…”

Section: Introductionmentioning

confidence: 99%

“…In addition, Q st of CH 4 is lower than that of CO 2 at the same adsorbed density. You et al [13] researched the adsorption behaviors of CH 4 , CO 2 , and their mixtures on bituminous coal by the means of numerical simulation. Their results showed that Q st of CH 4 and CO 2 both decrease with increasing adsorption amount, and this decline is due to the presence of heteroatom functional groups.…”

Section: Introductionmentioning

confidence: 99%

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Adsorption Equilibrium and Thermodynamic Analysis of CO₂ and CH₄ on Qinshui Basin Anthracite

Sun

et al. 2019

Geofluids

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Adsorption isotherms of CH4 and CO2 on Qinshui Basin anthracite were obtained at the temperatures of 283 K, 303 K, and 323 K using the gravimetric method. The feasibility of the displacement of CH4 by injecting CO2 on this anthracite was verified by calculating the selectivity factor of CO2 over CH4 (αCO2/CH4), adsorption affinities, and thermodynamic properties of CH4 and CO2. Results show that the values of αCO2/CH4 are more than 4.0. Henry’s constant (KH) of CH4 is smaller than that of CO2, and CH4 has a weaker affinity with coal surface. As temperature improves, KH of CO2 and CH4 decrease. Gibbs free energy change (ΔG) and surface potential (Ω) of CO2 are more negative than those of CH4, indicating that CO2 adsorption on anthracite is more spontaneous and favorable. The absolute values of Ω and ΔG of CH4 and CO2 increase with pressure rises. Isosteric heat of adsorption (Qst) of CH4 is lower than that of CO2. With increasing loading, Qst and entropy loss (ΔS) of CH4 decrease, while Qst and ΔS of CO2 increase. The higher ΔS of CO2 reveals that the adsorbed CO2 molecules constitute a more stable rearrangement than CH4 molecules. High temperature reduces ΔS of CH4 and CO2.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Adsorption Equilibrium and Thermodynamic Analysis of CO₂ and CH₄ on Qinshui Basin Anthracite

Sun

et al. 2019

Geofluids

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In‐situ temperature‐depth profile evaluation of South African unmineable coal seams to determine CO₂ sequestration potential

Premlall,

Kipyegon

2023

Can J Chem Eng

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This study aimed to investigate the sorption behaviour of South African coal seams with relation to the effect of temperature during CO2 sequestration. The excess adsorption isotherms of CO2 adsorption were undertaken using a high‐pressure volumetric system for four coals of different coal rank (denoted by Somkele [SK], anthracite KZN [AN], Tshikondeni [TD], and Syferfontein [SF]). The volumetric pressure step method was conducted at increments of system temperature of 35, 45, 55, and 65°C for pure CO2 adsorption at incremental pressures up to 93 bar. The results showed that high temperatures have a very significant negative effect on the amount of CO2 adsorbed on the coal samples. The high‐rank coal samples (SK and AN) demonstrated elevated CO2 adsorption capacity across all tested temperatures due to their high vitrinite content. The medium‐rank coals (TD and SF) exhibited comparatively lower CO2 adsorption capacity, attributed to the presence of adsorption hindrances such as higher ash content and volatile and mineral matter. The isosteric heat of adsorption revealed an increasing trend with coverage for all coal samples, with higher rank coals displaying greater slopes. The determined range of the isosteric heat of adsorption, spanning from 10 to 59 kJ/mol, indicated that the adsorption process is primarily of a physisorption nature. Three theoretical models (Langmuir, Freundlich, and Temkin) were evaluated and fitted to the sorption experimental data. The Temkin model exhibited superior fitting compared to the Langmuir and Freundlich isotherms. The Temkin isotherm parameters suggest that the adsorption of CO2 onto coal is a physisorption process.

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Molecular simulation and experimental studies on CO2 and N2 adsorption to bituminous coal

Zhu

Guo

Xie

et al. 2020

Environ Sci Pollut Res

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Adsorption behavior of carbon dioxide and methane in bituminous coal: A molecular simulation study

Cited by 68 publications

References 32 publications

Adsorption Equilibrium and Thermodynamic Analysis of CO₂ and CH₄ on Qinshui Basin Anthracite

Adsorption Equilibrium and Thermodynamic Analysis of CO₂ and CH₄ on Qinshui Basin Anthracite

In‐situ temperature‐depth profile evaluation of South African unmineable coal seams to determine CO₂ sequestration potential

Molecular simulation and experimental studies on CO2 and N2 adsorption to bituminous coal

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Adsorption behavior of carbon dioxide and methane in bituminous coal: A molecular simulation study

Cited by 68 publications

References 32 publications

Adsorption Equilibrium and Thermodynamic Analysis of CO2 and CH4 on Qinshui Basin Anthracite

Adsorption Equilibrium and Thermodynamic Analysis of CO2 and CH4 on Qinshui Basin Anthracite

In‐situ temperature‐depth profile evaluation of South African unmineable coal seams to determine CO2 sequestration potential

Molecular simulation and experimental studies on CO2 and N2 adsorption to bituminous coal

Contact Info

Product

Resources

About

Adsorption Equilibrium and Thermodynamic Analysis of CO₂ and CH₄ on Qinshui Basin Anthracite

Adsorption Equilibrium and Thermodynamic Analysis of CO₂ and CH₄ on Qinshui Basin Anthracite

In‐situ temperature‐depth profile evaluation of South African unmineable coal seams to determine CO₂ sequestration potential