Article
Chemistry, Physical
Mohadeseh Ilkhani, Ali Esfandyari Bayat, Saeed Harati
Summary: This study experimentally determined and compared the influences of stabilized methane foams using different nanoparticles on enhanced oil recovery from a limestone porous medium at different temperatures, finding that SiO2 and ZnO NPs had the best stability at 0.01 wt%, and TiO2 and Al2O3 NPs at 0.05 wt%, with up to 10% incremental oil recovery compared to foams without NPs at 85 degrees C.
JOURNAL OF MOLECULAR LIQUIDS
(2022)
Article
Energy & Fuels
Wei Yu, Xianmin Zhou
Summary: The geometric confinement has a significant impact on the foam coarsening dynamics in porous media. This study presents experimental and modeling research on coarsening-induced foam structural evolution in a porous microfluidic chip. The findings provide insights for predicting the foam structure in various applications, such as foam-assisted enhanced oil recovery and CO2 geological sequestration. The coarsening of edge bubbles dominates the foam coarsening process, and a mass transfer model is proposed to fit the coarsening rate of edge bubbles.
FRONTIERS IN ENERGY RESEARCH
(2022)
Article
Chemistry, Physical
Depeng Kong, Dongsheng Wang, Jian Chen, Jiaqing Zhang, Xu He, Bingqing Li, Xiaoqin He, Huan Liu
Summary: Foam extinguishing agents are considered to be important for suppressing fires, and foam stability plays a key role in determining fire-fighting efficiency. This study focuses on the foam stability of mixed foam extinguishing agents, especially under thermal conditions. The effects of mixed types and ratios on foaming ability, drainage, coarsening, and insulation characteristics are systematically studied. The results provide helpful guidance for achieving high effective utilization of different foam extinguishing agents.
JOURNAL OF MOLECULAR LIQUIDS
(2023)
Article
Polymer Science
Youjie Sheng, Yunchuan Peng, Shanwen Zhang, Ying Guo, Li Ma, Qiuhong Wang, Hanling Zhang
Summary: The study explores the influence of silica nanoparticles on the thermal stability of gel foams based on a mixture of fluorocarbon and hydrocarbon surfactants. Results indicate that NP concentration significantly affects the molecular interactions, surface tension, conductivity, and viscosity of the dispersions. Addition of NPs reduces the foaming ability of the solution and slows down coarsening, drainage, and decay of the gel foams under thermal action, ultimately enhancing their thermal stability.
Article
Energy & Fuels
V. Bubnovich, H. Hernandez, M. Toledo, C. Flores
Summary: Experimental investigation was conducted on combustion characteristics and flame stabilization within a two-layer porous media burner. The combustion wave propagation rate was found to increase with increased inlet velocity and decreased equivalence ratio. A porous burner with flame stabilized between two porous ceramics was successfully built, showing complete combustion with low CO and NOx emissions.
Review
Energy & Fuels
Khaled Z. Abdelgawad, Abdulrauf R. Adebayo, Abubakar Isah, Nasiru S. Muhammed
Summary: The flow dynamics of foam in porous media is an active research area in enhanced oil recovery and aquifer remediation. Foam strength and stability are crucial for its performance, but there are conflicting reports on the correlation between foam strength and the absolute permeability of the media. This review focuses on the commonly used parameters to characterize foam strength and stability, and their correlations with the absolute permeability of reservoir rocks.
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2022)
Article
Chemistry, Physical
Youjie Sheng, Canbin Yan, Yunchuan Peng, Yang Li, Li Ma, Qiuhong Wang, Wei Gao, Shanwen Zhang
Summary: This study investigates the synergistic effect of nanoparticles and surfactants on foam stability. The results show that the addition of nano-ATH improves the foam stability of the dispersions, providing a theoretical basis for the development of fire extinguishing agents using nano-ATH.
JOURNAL OF MOLECULAR LIQUIDS
(2022)
Article
Chemistry, Physical
Ping Ping, Bingqing Li, Jian Chen, Xu He, Dongsheng Wang, Jiaqing Zhang, Depeng Kong
Summary: This study examines the effect of temperature on the stability and film thinning behavior of aqueous film forming foam (AFFF). The results show that temperature significantly influences the foam stability and foam film stability. The foam lifetime decreases exponentially with increasing temperature, indicating decreased stability at higher temperatures. Additionally, a predictive model of film thickness under different temperatures is proposed and verified, considering the effect of temperature on foam fluid viscosity. The changing film surface adsorption, film surface elasticity, and film viscosity under higher temperature are found to cause the exponential decrease in film lifetime.
JOURNAL OF MOLECULAR LIQUIDS
(2023)
Review
Chemistry, Physical
P. Johnson, V Starov, A. Trybala
Summary: This review focuses on the interaction between foam and porous media, specifically on the flow within the substrate. It has been found that foam flow through pore channels is similar to its behavior within microchannels, suggesting that studying these properties within a model channel is the most effective approach. The article highlights the need for further research in understanding the interaction of foam and/or liquid within porous networks, and discusses methods such as using microchannels to simulate individual pores and building up to a 3D structure of interlinking pores to better represent foam and liquid flow in porous media. Advanced imaging techniques for observing flow through porous materials are also discussed.
CURRENT OPINION IN COLLOID & INTERFACE SCIENCE
(2022)
Article
Energy & Fuels
Jiali Wang, Zhongbin Ye, Nanjun Lai, Yuaojie Huang, Hongwei Xu
Summary: The research showed that increasing the modification degree of nanoparticles and surfactants can improve the synergistic foam stabilization effect. The best performance was observed when the SiO2 ratio was 2%, the AOS:SiO2 ratio was 0.2, increasing the half-life of the foaming liquid to 79.7 minutes.
ENERGY SOURCES PART A-RECOVERY UTILIZATION AND ENVIRONMENTAL EFFECTS
(2021)
Article
Biochemical Research Methods
Omotola Okesanjo, Guillaume Aubry, Sven Behrens, Hang Lu, J. Carson Meredith
Summary: Surfactant-free capillary foams (CFs) are highly tolerant to oil and have unique stability and flow properties. They can flow through a microporous environment and recover a large percentage of foam pumped through it. CF flow lacks steady state and exhibits phenomena such as increasing apparent viscosity, reconfigurable flow paths, and intermittent clogging of the micromodel from oil-particle composites and trapped bubbles in pores. CFs surprisingly exhibit similar bubble generation and destruction mechanisms to classical foams despite the absence of surfactants.
Article
Chemistry, Inorganic & Nuclear
Qian Shi, Kaiyun Chen, Zhonghai Yu, Zhiyong Dai, Jingxiao Wang, Yuanliang Chen, Lan Ma, Rui Han, Kun Cao, Fanghua Tian, Sen Yang, Yin Zhang
Summary: A three-dimensional crosslinked CFs@CNT/CoSx nanocomposite was synthesized by in situ growing carbon nanotubes on carbon nanofibers and a facile sulfurization process. The composite exhibits high specific surface areas and abundant ion diffusion channels, resulting in excellent sodium ion storage performance.
DALTON TRANSACTIONS
(2022)
Article
Thermodynamics
Gongxing Yan, Ali Shawabkeh, Rishabh Chaturvedi, R. Nur-Firyal, Mohammad Mehdizadeh Youshanlouei
Summary: In this study, a cavity with cool walls was used to cool a porous medium, and a magnetic field was applied. The findings showed that increasing Hartmann number decreased the heat transfer coefficient, while adding titanium oxide nanoparticles slightly increased the heat transfer coefficient.
CASE STUDIES IN THERMAL ENGINEERING
(2022)
Article
Energy & Fuels
Leandro F. Lopes, Juliana M. F. Facanha, Luis Maqueira, Felipe R. T. Ribeiro, Aurora Perez-Gramatges
Summary: Micromodel experiments were conducted to evaluate the impact of different coarsening reduction strategies on the stability of CO2-foams. Results showed that adding silica nanoparticles and using a mixture of CO2 and N2 as foaming gas can effectively reduce gas mobility, decrease pressure drop, improve foam texture, and increase gas trapping.
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2021)
Article
Environmental Sciences
Qingjian Li, Valentina Prigiobbe
Summary: This study presents an experimental investigation on nanoparticle transport by foam, showing the synergistic behavior between surfactants and nanoparticles in forming strong foam. The results suggest that high-quality foam with approximately 90% gas fraction can efficiently carry nanoparticles, and the efficiency increases with flow velocity. The mechanistic model coupling foam and nanoparticles transport with agglomeration and extended-DLVO theory agrees well with the measurements, making it a valuable tool for designing and predicting operations involving foam as a carrier of nanoparticles in subsurface applications.
JOURNAL OF CONTAMINANT HYDROLOGY
(2021)
Review
Engineering, Chemical
Wei Yu, Tao Wang, Ah-Hyung Alissa Park, Mengxiang Fang
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2020)
Article
Chemistry, Multidisciplinary
Wei Yu, Xianmin Zhou, Mazen Yousef Kanj
Summary: The study reveals that in porous media, trapped foam undergoes coarsening dynamics where larger bubbles grow at the expense of smaller bubbles. The foam coarsening kinetics are influenced by liquid film permeability, gas-liquid interfacial tension, and the molar volume of the dispersed phase. Foams prepared with less water-soluble gases and lower foam quality exhibit slower coarsening kinetics compared to those with higher water-soluble gases and higher foam quality.
Article
Energy & Fuels
Jiaqi Wang, Xinyu Zhang, Kun Ge, Wei Yu, Haoqi Wei, Jiaxing Liu
Summary: The commercial development of natural gas hydrates (NGH) is crucial for meeting future energy demands. Analyzing the efficiency of different production methods under various well configurations is essential for NGH exploitation. A simulation model was established based on the physical properties of hydrate reservoirs in the South China Sea. By comparing and analyzing natural gas production behavior using rapid depressurization and stepwise depressurization with a horizontal well, it was found that gravity enhances heat and mass transfer capacities in a horizontal well configuration, reducing water yield. Stepwise depressurization with a horizontal well is advantageous, as it significantly reduces water production, increases external energy input, and allows for quick reservoir heating.
Article
Chemistry, Multidisciplinary
Wei Yu, Jack Hau Yung Lo, Mazen Yousef Kanj
Summary: Foam characterization is crucial in various applications, and the standard method may not provide sufficient information. In this study, a method that combines vibration viscometry and foam column test is proposed to simultaneously measure foam viscosity and height. The correlation between foam structure, height, and viscosity during the decay process is investigated. This method is more sensitive and time-efficient than traditional height-based methods.
Article
Chemistry, Physical
Wei Yu, Ming Gao, Guanhe Rim, Mark L. Rivers, Ammar Alahmed, Aqil Jamal, Ah-Hyung Alissa Park
Summary: A novel MOF-based hybrid sorbent is synthesized through an innovative in-situ microencapsulated synthesis, allowing the deployment of functional nanocrystals without handling ultrafine particles and selectively rejecting undesired compounds to protect encapsulated MOFs.
GREEN ENERGY & ENVIRONMENT
(2023)