How does porosity heterogeneity affect the transport properties of multibore filtration membranes?

Wypysek, Denis; Rall, Deniz; Neef, Tobias; Jarauta, Alex; Secanell, Marc; Weßling, Matthias

doi:10.1016/j.memsci.2021.119520

Cited by 6 publications

(4 citation statements)

References 43 publications

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“…Reservoir heterogeneities can be analyzed in terms of porosity variations in rock. Porosity heterogeneity distribution has been studied by some researchers such as Wypysek, et al, (2021). There are several approaches to quantitatively determine the degree of heterogeneity in reservoirs.…”

Section: -Introductionmentioning

confidence: 99%

WITHDRAWN: Introducing new heterogeneity indices based on integrated petrophysical heterogeneity analysis in Sarvak carbonate reservoir of an Iranian oilfield in Dezful Embayment

Mehdipour,

Rabbani,

Kadkhodaie-Ilkhchi

2023

Preprint

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Heterogeneity is a very significant factor in reservoir static modeling, reservoir simulation, and determining hydrocarbon recovery of petroleum reservoirs. In this study, we tried to quantify and calculate different heterogeneity indicators for one cored well in the Sarvak reservoir of an Iranian oilfield located in the Dezful embayment (Zagros Basin). The coefficient of variation (CV) of permeability, Dykstra-Parsons Coefficient, and Lorenz Coefficient were used for heterogeneity analysis in the cored intervals of the formation. In addition, the coefficient of variation (CV) based on the petrophysical porosity log was calculated for whole intervals which can be used for heterogeneity index, especially in un-cored intervals. In this study, we checked the relationship between the conventional heterogeneity indices with some parameters including residual oil (Sor), variography, reservoir quality index (RQI), synthetic velocity deviation log (VDL), and skewness for the first time. This study showed that the CV of porosity can be used as reliable heterogeneity index in un-cored intervals. In addition, skewness of porosity and permeability can be used as heterogeneity indicators instead of routine static heterogeneity approaches. The existence of the shale and dolomite influences the reservoir heterogeneity. Moreover, by increasing the range of variography, CV of porosity rises. The VDL (as diagenesis indicator) and Sor have an inverse relationship with the CV of porosity. Therefore, in un-cured intervals various parameters can be used as reservoir heterogeneity indices.

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Section: -Introductionmentioning

confidence: 99%

WITHDRAWN: Introducing new heterogeneity indices based on integrated petrophysical heterogeneity analysis in Sarvak carbonate reservoir of an Iranian oilfield in Dezful Embayment

Mehdipour,

Rabbani,

Kadkhodaie-Ilkhchi

2023

Preprint

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“…As previously mentioned, the difference in the pressure between the inside and outside of the membrane is an important factor that affects membrane filtration performance [36]; therefore, a high transmembrane pressure difference is very beneficial for the membrane filtration process [37]. If the pressure inside the membrane is kept constant, it is beneficial to increase the pressure on the membrane surface.…”

Section: Membrane Surface Pressurementioning

confidence: 99%

Computational Fluid Dynamics Simulation to Investigate Diffuser Outlet Factors in Anaerobic Membrane Bioreactors Treating Wastewater

et al. 2023

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Anaerobic membrane bioreactors (AnMBRs) require biogas recycling to stir the mixed liquid and flush particles away from the membrane surfaces for stable operation. With the fixed gas cycling rate, gas diffuser configuration is an important factor that affects stirring and flushing performance. This study investigated the effect of different outlet diameters on biogas diffusers in AnMBR by using computational fluid dynamics (CFD) to analyze gas–liquid flow in a numerical model constructed based on an experimental AnMBR. According to the CFD results, as the outlet diameter increased from 2.5 to 5.0 mm, the average velocity increased from 0.15 to 0.31 m/s and the average wall shear stress (WSS) increased from 0.21 to 1.10 Pa on the membrane surface. The increase in gas velocity enhances the stirring effect, and the increase in WSS improves the flushing performance. However, when it was further increased to 10.0 mm, the average velocity and average WSS was 0.27 m/s and 0.22 Pa, respectively, indicating that too large an outlet diameter leads to a concentrated gas distribution, which reduces the performance of stirring and flushing. Furthermore, these results provide a basis for optimizing diffuser configuration, which is significant for promoting the practical application of AnMBR in wastewater treatment.

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“…The experimental gas flow rate is 2–4 L/min, combined with the specifications of the hollow fiber membrane contactor, the laminar flow interface is selected in the hydrodynamic model, and the gas flow in the shell can be expressed as the following formula 18 :

ρ_{normalg} (\nabla ∙ \overset{true\to}{v_{g}}) \overset{true\to}{v_{g}} = - \nabla p_{normalg} + \nabla ∙ [η_{normalg} (\nabla ∙ \overset{true\to}{v_{g}} + \nabla ∙ {\overset{v_{normalg}}{true}}^{T})],

η_{normalg} (\nabla ∙ \overset{true\to}{v_{g}} + \nabla ∙ {\overset{v_{normalg}}{true}}^{T}) = σ^{'} .

…”

Section: Model Developmentmentioning

confidence: 99%

3D models guide the design of hollow fiber membrane contactors with complex internal structures for CO₂ capture

Yin,

Liu,

Gao

et al. 2023

AIChE Journal

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Membrane contactors have good prospects in the field of CO2 capture. In this study, the effects of operation conditions (gas velocity, liquid flow, CO2 pressure, amine concentration, and CO2 loading) on CO2 absorption flux (JCO2) for CO2 absorption into N‐methyl‐4‐piperidinol (MPDL) solution in membrane contactors were investigated through experiments and simulations. A three‐dimensional (3D) model was developed using COMSOL Multiphysics software to study the comprehensive CO2 mass transfer process in the multifiber membrane contactor and the effect of the number of fibers on the flow and CO2 concentration distribution without simplifying the geometry compared with those of traditional one‐dimensional (1D) and two‐dimensional (2D) models. Non‐ideal effects occurring in hollow fiber membrane contactors can be explained using a 3D modeling. By comparing the simulated with the experimental , the effectiveness of the model was determined. The simulation results emphasize that the spatial concentration distribution has a great correlation with the corresponding velocity distribution. Additionally, reducing the uneven velocity distribution of gas and liquid is a very important factor to improve the mass transfer performance of CO2. Increasing the number of fibers with a constant total volumetric flux can reduce the thickness of the boundary layer and promote the mass transfer.

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How does porosity heterogeneity affect the transport properties of multibore filtration membranes?

Cited by 6 publications

References 43 publications

WITHDRAWN: Introducing new heterogeneity indices based on integrated petrophysical heterogeneity analysis in Sarvak carbonate reservoir of an Iranian oilfield in Dezful Embayment

WITHDRAWN: Introducing new heterogeneity indices based on integrated petrophysical heterogeneity analysis in Sarvak carbonate reservoir of an Iranian oilfield in Dezful Embayment

Computational Fluid Dynamics Simulation to Investigate Diffuser Outlet Factors in Anaerobic Membrane Bioreactors Treating Wastewater

3D models guide the design of hollow fiber membrane contactors with complex internal structures for CO₂ capture

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How does porosity heterogeneity affect the transport properties of multibore filtration membranes?

Cited by 6 publications

References 43 publications

WITHDRAWN: Introducing new heterogeneity indices based on integrated petrophysical heterogeneity analysis in Sarvak carbonate reservoir of an Iranian oilfield in Dezful Embayment

WITHDRAWN: Introducing new heterogeneity indices based on integrated petrophysical heterogeneity analysis in Sarvak carbonate reservoir of an Iranian oilfield in Dezful Embayment

Computational Fluid Dynamics Simulation to Investigate Diffuser Outlet Factors in Anaerobic Membrane Bioreactors Treating Wastewater

3D models guide the design of hollow fiber membrane contactors with complex internal structures for CO2 capture

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Product

Resources

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3D models guide the design of hollow fiber membrane contactors with complex internal structures for CO₂ capture