Estimation of Low-Temperature Mass-Transfer Properties of Methane and Carbon Dioxide in <i>n</i>-Decane, Hexadecane, and Bitumen Using the Pressure-Decay Technique

Pacheco-Roman, Francisco J.; Hejazi, S. Hossein; Maini, Brij B.

doi:10.1021/acs.energyfuels.6b00112

Cited by 11 publications

(6 citation statements)

References 28 publications

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“…Upreti and Mehrotra [ 21,22 ] considered concentration‐dependent diffusivity, D = D ( w ), in the primary mass transfer model (Equation ()), and reported the diffusivity of several gases in heavy oils using the principles of variational calculus. Based on analytical solutions of the mass transfer model, Zhang et al, [ 23 ] Sheikha et al, [ 24,25 ] and Pacheco‐Roman et al [ 26 ] developed graphical techniques to determine gas diffusivity from pressure decay data. Tendulkar et al [ 27 ] and Kundra et al [ 28,29 ] extended this approach to gas‐polymer systems.…”

Section: Methods For Diffusivity Determinationmentioning

confidence: 99%

Experimental determination of gas diffusivity in liquids—A review

Upreti

Mehrotra

2021

Can J Chem Eng

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Unit operations and processes abound with gas diffusion in liquids, which is a sophisticated phenomenon in which mass transfer is characterized by diffusion coefficient or diffusivity. Compared to diffusion in gas phase, the closely packed liquid molecules strongly influence diffusive mass transfer to the extent that it is impossible to have a general theory for a reasonably accurate estimation of diffusivity in liquids. This situation is further compounded by the fact that diffusivity cannot be measured directly but can only be estimated indirectly with the help of a number of observable properties (eg, mass, volume, pressure, etc). This fact gives rise to a myriad of experimental methods for the determination of gas diffusivity in liquids. These methods report gas diffusivities over widely varying ranges of temperature, pressure, and liquid composition. To provide a state‐of‐the‐art knowledge base for such methods is the objective of this work. The focus is on gas diffusion in binary gas‐liquid systems. Starting with necessary theoretical foundations, we provide a systematic categorization of these methods based on the property change utilized for diffusivity determination. The methods are then concisely described, and the diffusivity data are summarized for over 160 gas‐liquid systems at different temperature and pressure conditions. Empirical correlations are provided for different gas‐liquid systems, which could be used for interpolating gas diffusivity as a function of temperature, pressure, and composition.

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Section: Methods For Diffusivity Determinationmentioning

confidence: 99%

Experimental determination of gas diffusivity in liquids—A review

Upreti

Mehrotra

2021

Can J Chem Eng

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“…This result means that the diffusion of CO 2 in the oil-saturated core is dramatically enhanced by the increasing temperature. Additionally, as the viscosity of oil decreases with the increase of temperature (as shown in Figure b), the diffusivity of CO 2 increases with the decrease of viscosity. , The diffusion process on the molecular scale depends primarily on the movement of molecules of gas amongst oil molecules. Because the motion of gas molecules increases with temperature, the kinetic energy of the gas molecule increases as well.…”

Section: Resultsmentioning

confidence: 94%

Study on Diffusivity of CO₂ in Oil-Saturated Porous Media under High Pressure and Temperature

et al. 2019

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To figure out the influence of different factors on the diffusion of carbon dioxide (CO2) in oil-saturated porous media, an experimental method using a multifunctional core displacement instrument instead of a PVT Cell was proposed to monitor the pressure decay in ten cores (porous media) under high temperature from 20 to 80 °C and pressure from 15 to 30 MPa. Then, the traditional diffusion model and the improved diffusion model in this work without and with consideration of the influence of tortuosity were applied to calculate the diffusivity of CO2, respectively. Also, it can be found that the novel diffusion model can predict the pressure decay and the diffusivity of CO2 in porous media well, indicating that the proposed model in this work can be used as an effective method to predict the diffusion coefficient of CO2 in porous media. Additionally, the influences of tortuosity, temperature, and initial pressure on the diffusivity of CO2 in oil-saturated porous media were analyzed. The results showed that the tortuosity of porous media brings to a dramatic decrease of the diffusion coefficient, and the increasing temperature and higher initial pressure benefit the diffusion of CO2 in porous media.

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“…Nikkhou et al [2] reported the diffusion coefficient of CO 2 in heptane and hexadecane, deduced from the swelling of pendant drops at T = (313 to 393) K and pressures up to 8.6 MPa. Pacheco-Roman et al [3] used the pressure-decay method to determine the diffusivity of CO 2 in decane and hexadecane at T = (273 to 298) K and at p = 35 MPa. Additional data for CO 2 in hexadecane have been reported by Du et al [4] and Hao et al [5] using the Dynamic Pendant Droplet Volume Analysis (DPDVA) method and the NMR method, respectively.…”

Section: Introductionmentioning

confidence: 99%

Diffusion Coefficients of Methane in Methylbenzene and Heptane at Temperatures between 323 K and 398 K at Pressures up to 65 MPa

Taib

Trusler

2020

Int J Thermophys

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We reported experimental measurements of the diffusion coefficient of methane at effectively infinite dilution in methylbenzene and in heptane at temperatures ranging from (323 to 398) K and at pressures up to 65 MPa. The Taylor dispersion method was used and the overall combined standard relative uncertainty was 2.3%. The experimental diffusion coefficients were correlated with a simple empirical model as well as the Stokes–Einstein model with the effective hydrodynamic radius of methane depending linearly upon the solvent density. The new data address key gaps in the literature and may facilitate the development of an improved predictive model for the diffusion coefficients of dilute gaseous solutes in hydrocarbon liquids.

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Estimation of Low-Temperature Mass-Transfer Properties of Methane and Carbon Dioxide in n-Decane, Hexadecane, and Bitumen Using the Pressure-Decay Technique

Cited by 11 publications

References 28 publications

Experimental determination of gas diffusivity in liquids—A review

Experimental determination of gas diffusivity in liquids—A review

Study on Diffusivity of CO₂ in Oil-Saturated Porous Media under High Pressure and Temperature

Diffusion Coefficients of Methane in Methylbenzene and Heptane at Temperatures between 323 K and 398 K at Pressures up to 65 MPa

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Estimation of Low-Temperature Mass-Transfer Properties of Methane and Carbon Dioxide in n-Decane, Hexadecane, and Bitumen Using the Pressure-Decay Technique

Cited by 11 publications

References 28 publications

Experimental determination of gas diffusivity in liquids—A review

Experimental determination of gas diffusivity in liquids—A review

Study on Diffusivity of CO2 in Oil-Saturated Porous Media under High Pressure and Temperature

Diffusion Coefficients of Methane in Methylbenzene and Heptane at Temperatures between 323 K and 398 K at Pressures up to 65 MPa

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Product

Resources

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Study on Diffusivity of CO₂ in Oil-Saturated Porous Media under High Pressure and Temperature