Influence of Supercritical CO2 Fluid on CH4 and CO2 Diffusion in Vitrinite-Rich Coals and Inertinite-Rich Coals

Article Energy & Fuels

Microscopic pore structure changes in coal induced by a CO2-H2O reaction system

Shasha Gao et al.

Summary: The experiment demonstrated that CO2-H2O-coal interaction could significantly alter the pore structure of coal, forming new types of pores, increasing the number and size of pores, thereby enhancing coal bed methane recovery.

JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING (2022)

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Article Energy & Fuels

Effects of Sub- and Supercritical CO2 on Coal Diffusivity and Surface Thermodynamics

Wenfeng Guang et al.

Summary: The diffusion mechanism of CH4 and CO2 on the coal matrix is important for enhanced coal seam gas recovery and CO2 sequestration. Different-phase CO2 has different effects on gas mass transfer and surface thermodynamics in the coal matrix.

ENERGY & FUELS (2022)

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Article Energy & Fuels

CO2 Adsorption/Desorption, Induced Deformation Behavior, and Permeability Characteristics of Different Rank Coals: Application for CO2-Enhanced Coalbed Methane Recovery

Jiangang Ren et al.

Summary: The amount of CO2 adsorption/desorption, swelling/shrinkage deformation, and permeability in different rank coals vary significantly, with high-rank coal showing the largest sensitivity to CO2 swelling.

ENERGY & FUELS (2022)

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Review Geosciences, Multidisciplinary

Coal measure metallogeny: Metallogenic system and implication for resource and environment

Yong Li et al.

Summary: Coal and its derivatives are crucial for stable energy supply and economic development in China. The study of coal measure metallogeny is important for promoting the transition of coal from fuel to raw materials and achieving high-quality development.

SCIENCE CHINA-EARTH SCIENCES (2022)

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Article Thermodynamics

Direct evidence of CO2 softening effects on coal using nanoindentation

Guanglei Zhang et al.

Summary: This study reveals the effects of CO2 on the micro and nano-scale properties of coal, confirms the softening effects of CO2 on coal, and indicates that these changes are reversible to some extent.

ENERGY (2022)

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Article Thermodynamics

Enhanced coalbed methane recovery by the modification of coal reservoir under the supercritical CO2 extraction and anaerobic digestion br

Weizhong Zhao et al.

Summary: Coal reservoir can be modified through Sc-CO2 extraction and Sc-CO2-AD treatment to enhance CBM recovery. Sc-CO2 extraction increases coal pore volume and porosity, and weakens adsorption capacity. After Sc-CO2-AD treatment, coal porosity continues to increase, permeability is improved, and adsorption capacity for methane decreases.

ENERGY (2022)

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Article Energy & Fuels

Diffusion of guest molecules in coal: Insights from simulation

Song Yu et al.

Summary: This study investigated the diffusion behaviors of CH4, CO2, N-2, H2O, and O-2 under different temperature and pressure conditions using molecular mechanics, Monte Carlo, and molecular dynamics methods. The results show that the self-diffusion and transport diffusion coefficients of different gases vary under different ensembles. The diffusion coefficient of water generally increases with temperature, while the diffusion activation energy increases with pressure.

FUEL (2022)

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Article Chemistry, Physical

Bridging confined phase behavior of CH4-CO2 binary systems across scales

Lingfu Liu et al.

Summary: The phase behavior of confined fluids differs significantly from bulk fluid due to the importance of fluid-wall interactions under confinement. This study examines the confined phase behavior of a CH4-CO2 binary system using Monte Carlo simulations, a cubic equation of state, and the lattice Boltzmann method. The study provides insights into the effect of confinement on density, phase distribution, and adsorption isotherms, and offers a modified equation of state for mixtures in confinement.

JOURNAL OF SUPERCRITICAL FLUIDS (2022)

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Article Energy & Fuels

Influence of sequestered supercritical CO2 treatment on the pore size distribution of coal across the rank range

Kang Chen et al.

Summary: The influence of supercritical CO2 (SC-CO2) fluids on coal pore structure and mineral content is significant, leading to reductions in micropore volume, increases in average pore diameter and macropore volume, as well as alterations in mineral content. The impact of SC-CO2 is related to coal rank, with the greatest effect on lignite's macropore volume and anthracite's micropore volume. Mineral dissolution may contribute to the reduction in micropores and increase in mesopores and macropores.

FUEL (2021)

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Article Energy & Fuels

Insights into scale translation of methane transport in nanopores

Lingfu Liu et al.

Summary: Accurate prediction of flow behavior in shale matrix is crucial for efficient development of shale gas reservoirs due to the majority of pores being in the nano-size range. Molecular dynamics (MD) simulations capture microscale physics, but their computational expense limits them to small systems. The lattice Boltzmann method (LBM) bridges this gap and is used in this study to simulate methane transport in nano-size pores, incorporating force terms for adsorption effects and non-ideal fluid behavior. Parameters for optimal gas flow simulation in slit pores are determined, with results showing good agreement with MD simulations. Preconditioning schemes are proposed to improve LBM stability in complex geometries, motivating its use in scale translation of mass transport physics in permeable media.

JOURNAL OF NATURAL GAS SCIENCE AND ENGINEERING (2021)

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Article Energy & Fuels

Impacts of Long-Term Exposure to Supercritical Carbon Dioxide on Physicochemical Properties and Adsorption and Desorption Capabilities of Moisture-Equilibrated Coals

Han Zhang et al.

Summary: The long-term exposure of coal to scCO2-H2O significantly decreases mesopores in all coal types, while having minor effects on micropore surface area and volume. Additionally, the main oxygenic functional groups of coal are reduced and the Neimark fractal dimension increases after exposure, indicating increased pore surface roughness.

ENERGY & FUELS (2021)

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Article Energy & Fuels

Application of synchrotron ATR-FTIR microspectroscopy for chemical characterization of bituminous coals treated with supercritical CO2

Guanglei Zhang et al.

Summary: Injecting CO2 into deep coal seams has the potential to sequester CO2 and enhance coalbed methane recovery. Research has shown that this process leads to chemical changes in the coal structure, increasing its aromaticity. High-volatile and low-volatile bituminous coals exhibited a significant increase in aromaticity after treatment with ScCO2.

FUEL (2021)

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Article Energy & Fuels

Variation in permeability during CO2-CH4 displacement in coal seams: Part 1-Experimental insights

Yong Li et al.

FUEL (2020)

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Article Energy & Fuels

Nanoscale pore structure and mechanical property analysis of coal: An insight combining AFM and SEM images

Yong Li et al.

FUEL (2020)

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Article Energy & Fuels

Mechanistic insight into the optimal recovery efficiency of CBM in sub-bituminous coal through molecular simulation

Xiao-Qiang Liu et al.

FUEL (2020)

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Article Energy & Fuels

Influences of path control effects on characteristics of gas migration in a coal reservoir

Hongbing Wang et al.

FUEL (2020)

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Article Energy & Fuels

Effect of supercritical-CO2 interaction time on the alterations in coal pore structure

K. H. S. M. Sampath et al.

JOURNAL OF NATURAL GAS SCIENCE AND ENGINEERING (2020)

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Article Engineering, Environmental

Impact of surface chemistry and pore structure on water vapor adsorption behavior in gas shale

Jiajia Bai et al.

CHEMICAL ENGINEERING JOURNAL (2020)

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Article Energy & Fuels

Effects of supercritical CO2 on micropores in bituminous and anthracite coal

Shiqi Liu et al.

FUEL (2019)

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Article Energy & Fuels

Influences of dynamic entrainer-blended supercritical CO2 fluid exposure on high-pressure methane adsorption on coals

Dengfeng Zhang et al.

JOURNAL OF NATURAL GAS SCIENCE AND ENGINEERING (2019)

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Article Engineering, Environmental

Investigation of multi-gas transport behavior in shales via a pressure pulse method

Jiajia Bai et al.

CHEMICAL ENGINEERING JOURNAL (2019)

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Article Energy & Fuels

Kinetic behavior of heterogeneous sorption deformation on coal: Effect of maceral/micro-lithotype distribution

Farui Shi et al.

INTERNATIONAL JOURNAL OF COAL GEOLOGY (2019)

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Article Chemistry, Multidisciplinary

Effects of temperature and pressure on pore morphology of different rank coals: Implications for CO2 geological storage

Changjiang Liu et al.

JOURNAL OF CO2 UTILIZATION (2019)

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Article Energy & Fuels

Influence of Fluid Exposure on Surface Chemistry and Pore-Fracture Morphology of Various Rank Coals: Implications for Methane Recovery and CO2 Storage

Wei Li et al.

ENERGY & FUELS (2017)

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Article Energy & Fuels

Sorption Kinetics of CH4 and CO2 Diffusion in Coal: Theoretical and Experimental Study

Paul Naveen et al.

ENERGY & FUELS (2017)

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Article Energy & Fuels

Effect of maceral composition and coal rank on gas diffusion in Australian coals

Alireza Keshavarz et al.

INTERNATIONAL JOURNAL OF COAL GEOLOGY (2017)

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Article Meteorology & Atmospheric Sciences

State of the Climate in 2016

D. S. Arndt et al.

BULLETIN OF THE AMERICAN METEOROLOGICAL SOCIETY (2017)

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Article Energy & Fuels

Influence of high-pressure CO2 exposure on adsorption kinetics of methane and CO2 on coals

Qianqian Wang et al.

JOURNAL OF NATURAL GAS SCIENCE AND ENGINEERING (2016)

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Article Energy & Fuels

Effects of Coal Functional Groups on Adsorption Microheat of Coal Bed Methane

Fubao Zhou et al.

ENERGY & FUELS (2015)

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Article Energy & Fuels

Physical and structural effects of carbon dioxide storage on vitrinite-rich coal particles under subcritical and supercritical conditions

P. Mavhengere et al.

INTERNATIONAL JOURNAL OF COAL GEOLOGY (2015)

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Article Energy & Fuels

Multifractal analysis of Hg pore size distributions of tectonically deformed coals

Wei Li et al.

INTERNATIONAL JOURNAL OF COAL GEOLOGY (2015)

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Article Energy & Fuels

Impact of pore structure on gas adsorption and diffusion dynamics for long-flame coal

Huihui Liu et al.

JOURNAL OF NATURAL GAS SCIENCE AND ENGINEERING (2015)

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Article Chemistry, Physical

Investigation of oxygen-containing group promotion effect on CO2-coal interaction by density functional theory

Xia Huang et al.

APPLIED SURFACE SCIENCE (2014)

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Article Energy & Fuels

Molecular concept and experimental evidence of competitive adsorption of H2O, CO2 and CH4 on organic material

Yves Gensterblum et al.

FUEL (2014)

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Article Geochemistry & Geophysics

The use of solvent extractions and solubility theory to discern hydrocarbon associations in coal, with application to the coal-supercritical CO2 system

Jonathan J. Kolak et al.

ORGANIC GEOCHEMISTRY (2014)

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Proceedings Paper Chemistry, Applied

The investigation of CO2 storage potential in the Zululand Basin in South Africa

Nontobeko Chabangu et al.

12TH INTERNATIONAL CONFERENCE ON GREENHOUSE GAS CONTROL TECHNOLOGIES, GHGT-12 (2014)

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Article Chemistry, Physical

Effect of the surface oxygen groups on methane adsorption on coals

Shixiong Hao et al.

APPLIED SURFACE SCIENCE (2013)

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Article Engineering, Environmental

Molecular Simulation Studies of CO2 Adsorption by Carbon Model Compounds for Carbon Capture and Sequestration Applications

Yangyang Liu et al.

ENVIRONMENTAL SCIENCE & TECHNOLOGY (2013)

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Article Chemistry, Physical

Modified Redlich-Kwong equation of state for supercritical carbon dioxide

Ehsan Heidaryan et al.

JOURNAL OF SUPERCRITICAL FLUIDS (2013)

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Article Energy & Fuels

Molecular simulation of CO2 adsorption in micro- and mesoporous carbons with surface heterogeneity

Yangyang Liu et al.

INTERNATIONAL JOURNAL OF COAL GEOLOGY (2012)

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Article Chemistry, Physical

A novel correlation approach to estimate thermal conductivity of pure carbon dioxide in the supercritical region

Azad Jarrahian et al.

JOURNAL OF SUPERCRITICAL FLUIDS (2012)

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Proceedings Paper Energy & Fuels

Effects of CO2 storage in coal on coal properties

Tshifhiwa Maphala et al.

6TH TRONDHEIM CONFERENCE ON CO2 CAPTURE, TRANSPORT AND STORAGE (2012)

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Article Energy & Fuels

Supercritical Pure Methane and CO2 Adsorption on Various Rank Coals of China: Experiments and Modeling

Deng-Feng Zhang et al.

ENERGY & FUELS (2011)

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Article Energy & Fuels

Chemical structures of coal lithotypes before and after CO2 adsorption as investigated by advanced solid-state 13C nuclear magnetic resonance spectroscopy

Xiaoyan Cao et al.

INTERNATIONAL JOURNAL OF COAL GEOLOGY (2011)

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Article Chemistry, Physical

Viscosity of pure carbon dioxide at supercritical region: Measurement and correlation approach

Ehsan Heidaryan et al.

JOURNAL OF SUPERCRITICAL FLUIDS (2011)

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Article Energy & Fuels

Relationships between the Critical Properties of Gases and Their High Pressure Sorption Behavior on Coals

Richard Sakurovs et al.

ENERGY & FUELS (2010)

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Article Energy & Fuels

Coal lithotypes before and after saturation with CO2; insights from micro- and mesoporosity, fluidity, and functional group distribution

M. Mastalerz et al.

INTERNATIONAL JOURNAL OF COAL GEOLOGY (2010)

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Article Materials Science, Multidisciplinary

Study of structural change in Wyodak coal in high-pressure CO2 by small angle neutron scattering

Mojtaba Mirzaeian et al.

JOURNAL OF MATERIALS SCIENCE (2010)

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Article Energy & Fuels

Pore Accessibility of Methane and Carbon Dioxide in Coals

Jun-Seok Bae et al.

ENERGY & FUELS (2009)

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Editorial Material Multidisciplinary Sciences

Onshore Geologic Storage of CO2

Franklin M. Orr

SCIENCE (2009)

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Article Chemistry, Physical

Modification of the adsorption properties of high surface area graphites by oxygen functional groups

Montserrat R. Cuervo et al.

CARBON (2008)

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Article Energy & Fuels

Meso- and Micropore Characteristics of Coal Lithotypes: Implications for CO2 Adsorption

Maria Mastalerz et al.

ENERGY & FUELS (2008)

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Article Engineering, Chemical

Numerical simulation of multicomponent gas diffusion and flow in coals for CO2 enhanced coalbed methane recovery

X. R. Wei et al.

CHEMICAL ENGINEERING SCIENCE (2007)

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Review Energy & Fuels

Measurement and interpretation of supercritical CO2 sorption on various coals

Nikolai Siemons et al.

INTERNATIONAL JOURNAL OF COAL GEOLOGY (2007)

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Article Energy & Fuels

Argonne coal structure rearrangement caused by sorption of CO2

A. L. Goodman et al.

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Article Energy & Fuels

The interactions of coal with CO2 and its effects on coal structure

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Methane/CO2 sorption modeling for coalbed methane production and CO2 sequestration

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Sequestration of carbon dioxide in coal with enhanced coalbed methane recovery - A review

CM White et al.

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Article Energy & Fuels

Development of the meso- and macroporous structure of coals with rank as analysed with small angle neutron scattering and adsorption experiments

D Prinz et al.

FUEL (2004)

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Article Energy & Fuels

Selective transport of CO2, CH4, and N2 in coals:: insights from modeling of experimental gas adsorption data

XJ Cui et al.

FUEL (2004)

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Article Energy & Fuels

Methane and carbon dioxide adsorption-diffusion experiments on coal: upscaling and modeling

A Busch et al.

INTERNATIONAL JOURNAL OF COAL GEOLOGY (2004)

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Article Energy & Fuels

An inter-laboratory comparison of CO2 isotherms measured on argonne premium coal samples

AL Goodman et al.

ENERGY & FUELS (2004)

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Article Energy & Fuels

Behavior and effect of different coal microlithotypes during gas transport for carbon dioxide sequestration into coal seams

CÖ Karacan et al.

INTERNATIONAL JOURNAL OF COAL GEOLOGY (2003)

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Article Energy & Fuels

Characterization of organically bound oxygen forms in lignites, peats, and pyrolyzed peats by X-ray photoelectron spectroscopy (XPS) and solid-state 13C NMR methods

SR Kelemen et al.

ENERGY & FUELS (2002)

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Influence of Supercritical CO2 Fluid on CH4 and CO2 Diffusion in Vitrinite-Rich Coals and Inertinite-Rich Coals

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