Simplified local density model for adsorption of pure gases on activated carbon using Sutherland and Kihara potentials

Hasanzadeh, Mojtaba; Alavi, Farzad; Feyzi, Farzaneh; Dehghani, Mohammad Reza

doi:10.1016/j.micromeso.2010.08.011

Cited by 22 publications

(17 citation statements)

References 15 publications

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“…According to the previous analysis, clay and organic materials are mainly responsible for the gas adsorption on shale. It has also been known that the total amount of adsorbed methane is directly proportional to the organic matter content and the kerogen type of the shale (Jenkins and Boyer 2008;Prasad et al 2009;Elgmati et al 2011;Zhang et al 2012). In this study, kerogen types I, II and III were modelled with the SLD-PR model.…”

Section: Sld-pr Model Represents the Gas Adsorption On Clay Minerals mentioning

confidence: 99%

See 1 more Smart Citation

Methane Adsorption on Shale: Insights from Experiments and a Simplified Local Density Model

Zuo

Wang²,

Guo

et al. 2014

Adsorption Science & Technology

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We herein present a method for predicting adsorption isotherms of methane on shale using the simplified local density (SLD) theory: First, the adsorption isotherms of methane on shale samples were measured and then its adsorption on illite, illite/smectite mixed layer, chlorite, type I, type II and type III kerogen was described with the SLD theory. Second, based on the SLD parameters obtained from adsorption data on kerogen, clay minerals and the composition of the studied shale, we predicted adsorption capacity of the shale using a linear combination of the adsorption capacities of the pure substances weighted by their relative abundance.

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Section: Sld-pr Model Represents the Gas Adsorption On Clay Minerals mentioning

confidence: 99%

“…The value of acentric factor w is 0.0113 (Gasem et al 2001). The density r and energy parameter a of the adsorbed gas are position dependent, meaning that these parameters vary with coordinate Z; the fugacity of the adsorbed gas phase can be calculated using the following equation (Hasanzadeh et al 2010;Chareonsuppanimit et al 2012):…”

Section: Sld Modelmentioning

confidence: 99%

Methane Adsorption on Shale: Insights from Experiments and a Simplified Local Density Model

Zuo

Wang²,

Guo

et al. 2014

Adsorption Science & Technology

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“…Simulation of methane adsorption in diverse organic pores in shale reservoirs with multi-period… During adsorption, methane density is always higher at the position where the potential energy is the lowest (Liu et al 2018;Charoensuppanimit et al 2015;Hasanzadeh et al 2010). There are peak densities at symmetrical positions at both ends and inside the slit-shaped pore methane density distribution curve because the potential energy of the pore wall is strongest near the pore wall region.…”

Section: Methane Adsorption Characteristics Of Different Pore Typesmentioning

confidence: 99%

Simulation of methane adsorption in diverse organic pores in shale reservoirs with multi-period geological evolution

Chen

Zhang

et al. 2021

Int J Coal Sci Technol

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In shale reservoirs, the organic pores with various structures formed during the thermal evolution of organic matter are the main storage site for adsorbed methane. However, in the process of thermal evolution, the adsorption characteristics of methane in multi type and multi-scale organic matter pores have not been sufficiently studied. In this study, the molecular simulation method was used to study the adsorption characteristics of methane based on the geological conditions of Longmaxi Formation shale reservoir in Sichuan Basin, China. The results show that the characteristics of pore structure will affect the methane adsorption characteristics. The adsorption capacity of slit-pores for methane is much higher than that of cylindrical pores. The groove space inside the pore will change the density distribution of methane molecules in the pore, greatly improve the adsorption capacity of the pore, and increase the pressure sensitivity of the adsorption process. Although the variation of methane adsorption characteristics of different shapes is not consistent with pore size, all pores have the strongest methane adsorption capacity when the pore size is about 2 nm. In addition, the changes of temperature and pressure during the thermal evolution are also important factors to control the methane adsorption characteristics. The pore adsorption capacity first increases and then decreases with the increase of pressure, and increases with the increase of temperature. In the early stage of thermal evolution, pore adsorption capacity is strong and pressure sensitivity is weak; while in the late stage, it is on the contrary.

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“…The value of the acentric factor ω is 0.0113 for methane (Peng et al 1976). The fugacity of adsorbed gas phase can be calculated by the equation (Fitzgerald et al 2003;Hasanzadeh et al 2010): (17) The covolume b needs to be adjusted for describing the repulsive interaction of adsorbed fluid under high pressure. Then the equation (17) becomes: We used the expression introduced by Chen et al to obtain a ads (z) (Chen et al 1997).…”

Section: Sld Modelmentioning

confidence: 99%

A New Method to Calculate the Absolute Amount of Supercritical Methane Adsorption on Organic-Rich Shale

Luo

Zuo

Wei

2015

Adsorption Science & Technology

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ABSTRACT:We developed a new method to determine the absolute amount of adsorption. This method relies on the excess adsorption isotherm and density profile in the pore of one material. The simplified local density (SLD) model was introduced to compute the density profile and simplify the complex calculation of obtaining the absolute amount of adsorption. The SLD can accurately simulate the adsorption of supercritical methane on shale. The corresponding application of our method on the adsorption of methane on shale and AX-21 activated carbon was introduced. The absolute isotherms of adsorption calculated with our method were reasonable when compared to results using other methods.

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Simplified local density model for adsorption of pure gases on activated carbon using Sutherland and Kihara potentials

Cited by 22 publications

References 15 publications

Methane Adsorption on Shale: Insights from Experiments and a Simplified Local Density Model

Methane Adsorption on Shale: Insights from Experiments and a Simplified Local Density Model

Simulation of methane adsorption in diverse organic pores in shale reservoirs with multi-period geological evolution

A New Method to Calculate the Absolute Amount of Supercritical Methane Adsorption on Organic-Rich Shale

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