Adsorption behaviors of near-critical carbon dioxide on organic-rich shales: Modeling, multifractality, and kinetics

Li, Zhen; Zhang, Jinchuan; Mo, Xuanxue; Xu, Xiaokai; Zhang, Yu; Wang, Dongsheng; Tong, Zhongzheng; Tang, Xuan

doi:10.1016/j.cej.2021.132526

Cited by 26 publications

(17 citation statements)

References 107 publications

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“…The adsorption kinetic curves of g-CO 2 at a pressure of 5.5 MPa (Group I) are shown in Figure a. The adsorption kinetic curves are smooth (no fluctuations), which is consistent with the reported smooth adsorption kinetic curves of CO 2 − and CH 4 on shales. The excess adsorption capacity (Γ ad ) increases fast within a short time and gradually reaches an equilibrium.…”

Section: Resultssupporting

confidence: 85%

“…Correspondingly, pressure decreases slowly until it reaches a stable level. The data of the S 3 –S 4 stage were used to analyze the adsorption kinetics in the literature, and the time of the S 3 point is usually reset as zero for the adsorption kinetics study. − However, the adsorption amount at the S 3 point is not zero, because there are some gases in the shale before the S 3 –S 4 stage. When the pressure of 7.85 MPa is larger than P c in the near-critical region, the pressure of the S 3 –S 4 stage cannot reach a stable level even for an extended time, as shown in Figure c.…”

Section: Data Processingmentioning

confidence: 99%

“…The adsorption kinetics of CO 2 determines the CH 4 production rate and CO 2 storage rate. However, there are few studies on the adsorption kinetics of CO 2 . − …”

Section: Introductionmentioning

confidence: 99%

“…Compared with adsorption isotherms, studies on the adsorption kinetics of CO 2 in shale are still lacking. − Shale has a wide range of pore size distribution (PSD) from micropores to macropores. − The diffusion phenomenon is expressed as a controlling factor of the gas flow rate from micropores to macropores . The gas diffusion coefficient is an important parameter for evaluating shale gas production .…”

Section: Introductionmentioning

confidence: 99%

“…The gas diffusion coefficient is an important parameter for evaluating shale gas production . Therefore, the focus of adsorption kinetics is to obtain the diffusivity by using the unipore model and the modified unipore model (MM) to simulate the adsorption kinetic curve. − However, due to the experimental difficulty, most of the studies of adsorption kinetics experiments are carried out at low pressures for gaseous CO 2 . Davarpanah et al investigated CO 2 kinetic adsorption on shale samples from the Pazanan oilfield in southwest Iran in the pressure range of 2.5–6.5 MPa at a temperature beyond 40 °C.…”

Section: Introductionmentioning

confidence: 99%

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Adsorption Kinetic Behavior of Gaseous and Supercritical CO₂ in the Near-Critical Region on Shale

Qing

Tang

et al. 2022

Ind. Eng. Chem. Res.

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In this paper, the adsorption kinetic behaviors of g-CO2 and SC-CO2 on the WF shale in the pressure (5.5 MPa to 8 MPa) and temperature (32 to 45 °C) ranges were obtained in order to investigate CO2 adsorption kinetic behavior in the near-critical region. It is observed that the adsorption kinetic curves are quite different in different pressure and temperature ranges, which can be classified into “normal”, “normal-fluctuation”, and “abnormal-fluctuation” curves. These adsorption kinetic behaviors of CO2 are determined by the change rate of CO2 physical parameters, corresponding to three obvious regions on the change rate curve of CO2 physical parameters. The adsorption kinetic behavior of CO2 exhibits fluctuation in the near-critical region. Under the conditions very close to the critical pressure and temperature of CO2, the excess adsorption capacity (Γad) of SC-CO2 fluctuates from maximum to negative.

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Section: Resultssupporting

confidence: 85%

Section: Data Processingmentioning

confidence: 99%

“…The adsorption kinetics of CO 2 determines the CH 4 production rate and CO 2 storage rate. However, there are few studies on the adsorption kinetics of CO 2 . − …”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Adsorption Kinetic Behavior of Gaseous and Supercritical CO₂ in the Near-Critical Region on Shale

Qing

Tang

et al. 2022

Ind. Eng. Chem. Res.

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Pore Structure Monofractal and Multifractal Characteristics of High-Mature Organic-Rich Shale Using N2 Adsorption–Desorption Measurements

Wei,

Pang,

Yang

et al. 2024

Nat Resour Res

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Searching for a cost-effective method of determining sorption properties for the industrial use of CO2 capture

Staf

Kyselová

2023

Chem. Pap.

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The study focuses on laboratory testing of carbon-dioxide adsorption. It compares three methods used to determine the capacity of the adsorbents proposed for CO2 capture. The tests have been performed on two samples, namely natural clinoptilolite and a 13X molecular sieve. Two methods were dynamic and one was static. The first dynamic method evaluated the capacity based on the change in CO2 volume fraction before and after a fixed-bed adsorber. For the same purpose, the second dynamic method used a gravimetric procedure. The static method detected a change in pressure during CO2 adsorption. The capacities determined for carbon-dioxide mole fractions of 5, 10, 13 and 20% at temperatures of 30 and 40 °C at atmospheric pressure were compared. The apparatus with a fixed-bed adsorber made it possible to perform tests also for overpressures of 2 and 5 bar and lower temperatures. The capacity obtained on the three apparatuses showed good agreement. The maximum capacity (3.32 mmol g−1) was determined for the 13X sample at 10 °C and a partial CO2 pressure of 120 kPa and, conversely, the lowest (0.12 mmol g−1) for clinoptilolite at 40 °C and a partial CO2 pressure of 5 kPa. There was no significant difference in capacity standard deviations between the apparatus (0.014–0.036 mmol g−1). The fixed-bed apparatus required one to three orders of magnitude more gas for the experiment and was more challenging to operate and evaluate the data.

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Adsorption behaviors of near-critical carbon dioxide on organic-rich shales: Modeling, multifractality, and kinetics

Cited by 26 publications

References 107 publications

Adsorption Kinetic Behavior of Gaseous and Supercritical CO₂ in the Near-Critical Region on Shale

Adsorption Kinetic Behavior of Gaseous and Supercritical CO₂ in the Near-Critical Region on Shale

Pore Structure Monofractal and Multifractal Characteristics of High-Mature Organic-Rich Shale Using N2 Adsorption–Desorption Measurements

Searching for a cost-effective method of determining sorption properties for the industrial use of CO2 capture

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Adsorption behaviors of near-critical carbon dioxide on organic-rich shales: Modeling, multifractality, and kinetics

Cited by 26 publications

References 107 publications

Adsorption Kinetic Behavior of Gaseous and Supercritical CO2 in the Near-Critical Region on Shale

Adsorption Kinetic Behavior of Gaseous and Supercritical CO2 in the Near-Critical Region on Shale

Pore Structure Monofractal and Multifractal Characteristics of High-Mature Organic-Rich Shale Using N2 Adsorption–Desorption Measurements

Searching for a cost-effective method of determining sorption properties for the industrial use of CO2 capture

Contact Info

Product

Resources

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Adsorption Kinetic Behavior of Gaseous and Supercritical CO₂ in the Near-Critical Region on Shale

Adsorption Kinetic Behavior of Gaseous and Supercritical CO₂ in the Near-Critical Region on Shale