Measuring and modelling supercritical adsorption of CO2 and CH4 on montmorillonite source clay

Hwang, Junyoung; Joss, Lisa; Pini, Ronny

doi:10.1016/j.micromeso.2018.06.050

Cited by 48 publications

(44 citation statements)

References 73 publications

(134 reference statements)

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“…The constant b was obtained by the method of weighted least squares, where the uncertainty in the measured weight, u(MP 1 ) , was accounted for; the uncertainty in b was then obtained by error propagation in terms of u(MP 1 ) values (see e.g. [16]). For each adsorbent, estimates of V s have been computed from the constant b and are reported in Table 2, together with their uncertainty, u(V s ) .…”

Section: Helium Gravimetry and Adsorbent Densitymentioning

confidence: 99%

Measurement and interpretation of unary supercritical gas adsorption isotherms in micro-mesoporous solids

2021

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Gas adsorption at high pressures in porous solids is commonly quantified in terms of the excess amount adsorbed. Despite the wide spectrum of adsorbent morphologies available, the analysis of excess adsorption isotherms has mostly focused on microporous materials and the role of mesoporosity remains largely unexplored. Here, we present supercritical CO2 adsorption isotherms measured at $$T=308$$ T = 308 K in the pressure range $$p=0.02{-}21$$ p = 0.02 - 21 MPa on three adsorbents with distinct fractions of microporosity, $$\phi_2$$ ϕ 2 , namely a microporous metal-organic framework ($$\phi_2=70$$ ϕ 2 = 70 %), a micro-mesoporous zeolite ($$\phi_2=38$$ ϕ 2 = 38 %) and a mesoporous carbon ($$\phi_2<0.1$$ ϕ 2 < 0.1 %). The results are compared systematically in terms of excess and net adsorption relative to two distinct reference states–the space filled with gas in the presence/absence of adsorbent–that are defined from two separate experiments using helium as the probing gas. We discuss the inherent difficulties in extracting from the supercritical adsorption isotherms quantitative information on the properties of the adsorbed phase (its density or volume), because of the nonuniform distribution of the latter within and across the different classes of pore sizes. Yet, the data clearly reveal pore-size dependent adsorption behaviour, which can be used to identify characteristic types of isotherm and to complement the information obtained using the more traditional textural analysis by physisorption.

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Section: Helium Gravimetry and Adsorbent Densitymentioning

confidence: 99%

Measurement and interpretation of unary supercritical gas adsorption isotherms in micro-mesoporous solids

2021

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“…Our framework therefore provides a new way to understand the temperature-dependent behavior of supercritical methane adsorption in shales and allows researchers to more accurately estimate gas resources in subsurface shale formations. It is worth to emphasize that the clay minerals in shale also have the capacity to adsorb methane and thus contribute the total methane adsorption uptake in shales (Ji et al, 2012;Fan et al, 2014;Heller et al, 2014 andHwang et al, 2019), and more research works are needed to clarify the contribution of clay minerals for the maximum methane adsorption uptake in shales.…”

Section: Maximum Adsorption Uptakementioning

confidence: 99%

New perspectives on supercritical methane adsorption in shales and associated thermodynamics

Tang

Ripepi

Rigby

et al. 2019

Journal of Industrial and Engineering Chemistry

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“…Equation 5 can be applied to excess quantities directly, but only up to moderate densities. 37,60,61 In this study, we have used the density range, ρ b ≤ 0.1 × ρ liq , corresponding to about 5 MPa for CO 2 and 8 MPa for CH 4 . Under these conditions, GCMC simulation results on shale rocks 62 confirm that there is no significant deviation between excess and absolute quantities.…”

Section: Isosteric Enthalpy Of Adsorptionmentioning

confidence: 99%

Supercritical CO₂ and CH₄ Uptake by Illite-Smectite Clay Minerals

Hwang

Pini

2019

Environ. Sci. Technol.

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Clay minerals abound in sedimentary formations and the interaction of reservoir gases with their sub-micron features has direct relevance to many geo-energy applications. The quantification of gas uptake over a broad range of pressures is key towards assessing the significance of these physical interactions on enhancing storage capacity and gas recovery. We report a systematic investigation of the sorption properties of three source clay minerals-Na-rich montmorillonite (SWy-2), illite-smectite mixed layer (ISCz-1), and illite (IMt-2)-using CO 2 and CH 4 up to 30 MPa at 25 to 115 • C. The textural characterization of the clays by gas physisorption indicates that micropores are only partly accessible to N 2 (77 K) and Ar (87 K), while larger uptakes are measured with CO 2 (273 K) in the presence of illite. The supercritical excess sorption experiments confirm these findings, while revealing differences in uptake capacities that originate from the clay-specific pore size distribution. The Lattice Density Functional Theory (LDFT) model describes accurately the measured sorption isotherms by using a distribution of properly weighted slit pores and clay-specific solid-fluid interaction energies, which agree with isosteric heats of adsorption obtained experimentally. The model indicates that the maximum degree of pore occupancy is universal to the three 1 clays and the two gases, and it depends solely on temperature, reaching values near unity at the critical temperature. These observations greatly support the model's predictive capability for estimating gas adsorption on clay-bearing rocks and sediments.

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Measuring and modelling supercritical adsorption of CO2 and CH4 on montmorillonite source clay

Cited by 48 publications

References 73 publications

Measurement and interpretation of unary supercritical gas adsorption isotherms in micro-mesoporous solids

Measurement and interpretation of unary supercritical gas adsorption isotherms in micro-mesoporous solids

New perspectives on supercritical methane adsorption in shales and associated thermodynamics

Supercritical CO₂ and CH₄ Uptake by Illite-Smectite Clay Minerals

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Measuring and modelling supercritical adsorption of CO2 and CH4 on montmorillonite source clay

Cited by 48 publications

References 73 publications

Measurement and interpretation of unary supercritical gas adsorption isotherms in micro-mesoporous solids

Measurement and interpretation of unary supercritical gas adsorption isotherms in micro-mesoporous solids

New perspectives on supercritical methane adsorption in shales and associated thermodynamics

Supercritical CO2 and CH4 Uptake by Illite-Smectite Clay Minerals

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Product

Resources

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Supercritical CO₂ and CH₄ Uptake by Illite-Smectite Clay Minerals