Gas holdup and flow regime in a bubble column that includes enhanced oil recovery chemicals

Orlando, A. E.; Barca, Luiz Fernando; Heindel, Theodore J.; Klein, Tânia Suaiden; Medronho, Ricardo de Andrade

doi:10.1016/j.petrol.2021.108675

Cited by 5 publications

(2 citation statements)

References 31 publications

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“…Although increasing the surfactant concentration above the CMC and the addition of nanoparticles significantly decreased the ripening function A of the CO 2 foams shown in Figure b compared to foams generated at surfactant concentrations below the CMC, the coarsening rates were significantly high, as indicated from the n exponents ( n > 0.27) of A . This phenomenon matches the findings reported by Orlando et al and is attributed to the ability of the foaming solution/dispersion to generate foam bubbles of small radiuses because they were possessing low surface tension measurements of ∼37 mN/m with CO 2 at ambient conditions . Hence, the total surface area of the foam bubbles was high, and the gas diffusion between foam bubbles was more significant than the gas diffusion between larger foam bubbles.…”

Section: Resultssupporting

confidence: 90%

“…This phenomenon matches the findings reported by Orlando et al and is attributed to the ability of the foaming solution/dispersion to generate foam bubbles of small radiuses because they were possessing low surface tension measurements of ∼37 mN/m with CO 2 at ambient conditions. 51 Hence, the total surface area of the foam bubbles was high, and the gas diffusion between foam bubbles was more significant than the gas diffusion between larger foam bubbles. Finally, on the basis of the modeling results, the optimum foaming systems required for the generation of stable CO 2 were the utilization of 250 and 500 ppm of FAU nanoparticles dispersed with CTAB at a concentration of 750 ppm because they were able to stabilize the CO 2 foam by both retarding the bubble evolution as a result of coalescence and coarsening.…”

Section: Ctab Concentrationmentioning

confidence: 99%

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Stabilization of Carbon Dioxide Foam by a Low Concentration of Cetyltrimethylammonium Bromide-Grafted Nano-Faujasite Zeolite. Part 2: Modeling

Mheibesh,

Hashlamoun,

Nassar

2023

Energy Fuels

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There is a dire need for a descriptive model that adequately evaluates the foam stabilizing and destabilizing processes in the presence of nanoparticles. In this study, we are using the population balance model (PBM) to investigate the effects of implementing sole cetyltrimethylammonium bromide (CTAB) as well as CTAB grafted or physically mixed with faujasite (FAU) nanoparticles on the evolution of CO 2 foam bubbles and liquid holdup. In this method, the sizes of the generated CO 2 foam bubbles of all foaming systems were monitored experimentally and converted into a log-normal population of bubble sizes at every time scale. Then, the obtained population bubble sizes were incorporated into the PBM to obtain approximate solutions and empirical forms describing the coalescence and ripening kernels of foam bubbles with respect to liquid hold-up. Our modeling results indicated that the primary CO 2 foam stabilization mechanism was different based on the applied concentration levels of CTAB and its interaction with FAU nanoparticles. Below the critical micelle concentration (CMC), the virgin surfactant and physically mixed surfactant/nanoparticles showed a high coalescence rate in contrast to the CTAB-grafted FAU nanoparticles. For instance, our findings indicated that the CTAB-grafted FAU nanofluids at a concentration of 100 ppm had a 1000 times lower bubble coalescence rate than the physical mixing of 100 ppm of CTAB with 500 ppm of FAU nanoparticles. Hence, grafting the surfactant on the surface of nanoparticles before application in CO 2 foaming can significantly reduce the breakage of foam bubbles at a surfactant concentration below the CMC. Above the CMC, on the other hand, the PBM indicated that reducing the CO 2 bubbles coarsening was the major CO 2 foam bubble stabilization mechanism. As a broader impact, our modeling results and developed empirical forms of foam coalescence and ripening functions are helpful in accurately predicting the real phenomena that are responsible for foam stabilization at a wide range of conditions.

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Section: Resultssupporting

confidence: 90%

Section: Ctab Concentrationmentioning

confidence: 99%

Stabilization of Carbon Dioxide Foam by a Low Concentration of Cetyltrimethylammonium Bromide-Grafted Nano-Faujasite Zeolite. Part 2: Modeling

Mheibesh,

Hashlamoun,

Nassar

2023

Energy Fuels

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CFD simulations of a bubble column containing enhanced oil recovery chemicals

Orlando,

Haelssig,

Klein

et al. 2024

Can J Chem Eng

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Chemical enhanced oil recovery (EOR) methods return produced water containing polymers and surfactants which poses a water treatment challenge at offshore facilities. The present work shows that numerical simulations of gas‐water systems containing these chemicals remain challenging. Computational fluid dynamics (CFD) was used to predict gas holdup in a laboratory bubble column containing brine and EOR chemicals. The synthetic produced water was treated as non‐Newtonian in the simulations to match the experimentally‐determined physical properties. Two‐ and three‐dimensional numerical simulations were performed, and the latter were shown to be more appropriate through statistical analysis. Three classical drag models were assessed, and the results indicated that none of them could account for the high liquid viscosities and low surface tensions encountered in the system. A modification to the drag model of Tomiyama et al. (1988) was proposed to account for drag increases at low bubble Reynolds numbers when liquid apparent viscosity is high and surface tension is low. The importance of considering the interaction between apparent viscosity and surface tension was also shown through statistical analysis. CFD predictions of gas holdup showed that the proposed drag modification reduced errors from approximately 30% to less than 10% when compared to the experimental data. Radial profiles of the axial liquid velocity were also assessed and are apparently related to gas holdup prediction.

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Gas holdup at dynamic equilibrium region of a bubble column: Effect of bubble generator performance

Gong

Yang

2022

Chemical Engineering Journal

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Gas holdup and flow regime in a bubble column that includes enhanced oil recovery chemicals

Cited by 5 publications

References 31 publications

Stabilization of Carbon Dioxide Foam by a Low Concentration of Cetyltrimethylammonium Bromide-Grafted Nano-Faujasite Zeolite. Part 2: Modeling

Stabilization of Carbon Dioxide Foam by a Low Concentration of Cetyltrimethylammonium Bromide-Grafted Nano-Faujasite Zeolite. Part 2: Modeling

CFD simulations of a bubble column containing enhanced oil recovery chemicals

Gas holdup at dynamic equilibrium region of a bubble column: Effect of bubble generator performance

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