Review
Chemistry, Applied
Yue Qin, Liyan Shang, Zhenbo Lv, Jianyu He, Xu Yang, Zhien Zhang
Summary: This paper reviews the recent applications of porous media in methane hydrate formation and analyzes the influence of porous media systems on the phase equilibria and formation kinetics of hydrates. The nature of the media on methane hydrate formation in porous media systems is comprehensively summarized, and the effect of various promoters on methane hydrate formation is evaluated. Mechanisms for methane hydrate formation in various porous media systems are proposed, and the future perspectives and challenges of hydrate-based technologies in tackling global climate change are discussed.
JOURNAL OF ENERGY CHEMISTRY
(2022)
Article
Thermodynamics
Xuemin Zhang, Jiaxian Wang, Huijie Yang, Jinping Li, Yinhui Li, Qingbai Wu
Summary: The study investigates the formation process of CO2 hydrate and finds that CO2 liquefaction significantly promotes the formation of hydrate. The liquefied amount is a critical factor in affecting the formation process, and an optimal liquefaction amount exists to promote the formation of hydrate in porous media.
APPLIED THERMAL ENGINEERING
(2022)
Article
Energy & Fuels
Huiru Sun, Bingbing Chen, Ziming Yang, Yongchen Song, Mingjun Yang
Summary: This study focused on the effects of hydrate saturation change and multiphase flow on NGHs production behaviors at different exploitation stages. The results showed that initial hydrate saturation and water-gas flowrate were negatively correlated with the onset time of blockage and amount of hydrate reformation.
Article
Energy & Fuels
Xuke Ruan, Chun-Gang Xu, Ke-Feng Yan, Xiao-Sen Li
Summary: The study experimentally and numerically investigated the effects of permeability and hydrate dissociation surface area on the kinetics of hydrate decomposition in porous media, finding that these factors are crucial for gas production from hydrates and the controlling factor for dissociation kinetics can switch from permeability to hydrate dissociation surface area depending on hydrate saturation and accumulation habits in porous media.
FRONTIERS IN ENERGY RESEARCH
(2021)
Article
Energy & Fuels
Zhiang Wen, Yanbin Yao, Wanjing Luo, Xin Lei
Summary: Monitoring the formation process of CO2 hydrate in sandstone cores revealed a memory effect, with secondary synthesis showing significantly higher rates and saturation levels compared to primary synthesis. This memory effect is attributed to changes in water molecular structure and the different pore occupation models during primary and secondary synthesis.
Article
Engineering, Environmental
Xuan Kou, Xiao-Sen Li, Yi Wang, Rui Xu, Zhao-Yang Chen
Summary: This study achieved the controllable process of heterogeneous hydrate phase transition at a macroscale and successfully realized different distribution patterns of hydrates. The observations revealed that water and gas transfer in pores governed the kinetic of heterogeneous hydrate phase transition. A new sequence of nucleation-growth-migration driven by water migration for heterogeneous hydrate formation was proposed, and it was found that the phase transition rates between heterogeneous and homogeneous hydrate differed by 2 to 3 times due to mass migration. These findings are important for explaining the enrichment of methane hydrate in marine sediment and developing targeted approaches to natural gas hydrate production, as well as indicating the feasibility of hydrocarbon capture, storage, and transport using hydrate-based technologies.
CHEMICAL ENGINEERING JOURNAL
(2023)
Review
Green & Sustainable Science & Technology
Xuemin Zhang, Huijie Yang, Tingting Huang, Jinping Li, Pengyu Li, Qingbai Wu, Yingmei Wang, Peng Zhang
Summary: This review comprehensively summarizes the progress and important findings in the study of the formation-decomposition mechanism and stability of CO2 hydrate in porous media. It discusses the influence of various key factors and highlights the advantages of MD simulation in predicting hydrate formation and decomposition processes.
RENEWABLE & SUSTAINABLE ENERGY REVIEWS
(2022)
Article
Energy & Fuels
Ming Li, Abraham Rojas Zuniga, Paul L. Stanwix, Zachary M. Aman, Eric F. May, Michael L. Johns
Summary: In this study, a novel suite of NMR techniques was used to determine the in-situ composition during both CH4 hydrate generation and subsequent CO2-CH4 hydrate exchange in a model porous medium. The data obtained from MRI and NMR provided quantitative in-situ composition analysis as well as pore-scale occupation data, which will enable future systematic studies of this complex exchange process.
Article
Energy & Fuels
Yi Lu, Yu Feng, Dawei Guan, Xin Lv, Qingping Li, Lunxiang Zhang, Jiafei Zhao, Lei Yang, Yongchen Song
Summary: This study investigated the formation condition of nanobubbles and its effect on the dissociation of methane hydrate through molecular dynamics simulations. Two different initial configurations were used to examine the influence of liquid water proportion on the dissociation path and nanobubble formation. The results revealed four main dissociation stages under low liquid water proportion, with nanobubbles forming when the methane supersaturation condition was met. The formation of nanobubbles broke the mass transfer limitation, leading to an increased hydrate dissociation rate. Small nanobubbles formed at the end of the dissociation process contributed to the collapse of the final hydrate slice by shortening the diffusion distance of methane molecules to the gas phase. One surviving nanobubble was observed at the end of the simulation for systems with methane mole percent in water of 0.4 and 0.9, respectively.
Article
Engineering, Environmental
Yu Feng, Yang Zhao, Yuze Han, Yanzhen Liu, Lunxiang Zhang, Jiafei Zhao, Lei Yang, Yongchen Song
Summary: The formation and dissociation behavior of CO2 hydrates in the presence of clay particles were investigated using low-field nuclear magnetic resonance. It was found that montmorillonite particles significantly promoted the conversion of water into hydrate, while illite particles had a weaker promoting effect. According to the DLVO theory, the total interaction potential between montmorillonite particles was much higher than that between illite particles.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Thermodynamics
Saeid Sinehbaghizadeh, Agus Saptoro, Sepideh Amjad-Iranagh, Amir H. Mohammadi
Summary: This study investigates the influence of different biogas compositions on clathrate hydrate formation and proposes a kinetic model for predicting the progress of biogas crystal growth. The results indicate that the concentration of dissolved gas in liquid water is a key factor in the growth rate, with H2S and SO2 molecules slightly promoting biogas hydrate formation and N2 and H2 molecules reducing the generation rate of biogas hydrate.
Article
Energy & Fuels
Yue Qin, Ruixin Bao, Liyan Shang, Li Zhou, Lingxin Meng, Wenhao Zhu, Jian Zhu, Yong Chen
Summary: In recent years, there has been increased interest in porous media due to their ability to enhance the kinetics of hydrate formation. This study investigates the promoting effect of two different porous media, activated alumina and glass beads, on methane hydrate formation. The results show that smaller particle sizes lead to better promotion of hydrate formation, with faster kinetics and higher gas consumption. Activated alumina particles outperform glass beads due to their abundant micropores and unique electric double layer distribution. The gas storage density of hydrates is also affected by particle size, with the 1 mm alumina system achieving a higher gas storage density compared to the 1 mm glass bead system. The study also reveals that the movement of the porous media bed and hydrate layer is influenced by capillary force and methane gas driving force. These findings provide valuable insights into the formation and occurrence of hydrates in the presence of porous media and surfactants.
ENERGY SOURCES PART A-RECOVERY UTILIZATION AND ENVIRONMENTAL EFFECTS
(2022)
Article
Green & Sustainable Science & Technology
Amin Hosseini Zadeh, Ijung Kim, Seunghee Kim
Summary: Hydrate-based CO2 sequestration (HBCS) is a new method to store large amounts of CO2 in geological sediments as crystalline solids. This study investigates the characteristics and kinetics of CO2 hydrate formation and dissociation under different conditions. The results suggest that hydrate nucleation and growth are limited in a porous medium due to solid particles, limited CO2 mass transfer, and heat transfer. Limited CO2 diffusion, hydrate nucleation, and better protection of hydrates are key factors for successful formation in the porous medium.
INTERNATIONAL JOURNAL OF GREENHOUSE GAS CONTROL
(2023)
Review
Energy & Fuels
Sergey Misyura, Pavel Strizhak, Anton Meleshkin, Vladimir Morozov, Olga Gaidukova, Nikita Shlegel, Maria Shkola
Summary: Gas hydrates have potential as energy sources and applications in gas separation, capture technologies, and seawater desalination. However, these technologies face challenges due to high power consumption, low growth rates, and lack of understanding about the combined effects of surfactants and the kinetics of CO2 hydrate dissociation. The presented review suggests ways to improve efficiency, such as using surfactants and enhancing heat and mass transfer, which can increase growth rates and transform water into gas hydrates. Considering the kinetics is important for gas hydrate storage, transportation technologies, and climate warming models in permafrost regions.
Article
Energy & Fuels
Xingxun Li, Cunning Wang, Qingping Li, Qi Fan, Guangjin Chen, Changyu Sun
Summary: In this study, the growth behavior of methane hydrate film on pore interior surfaces was directly visualized and studied using a transparent high-pressure glass microfluidic chip with a porous structure. The results showed that the thickening growth process of the film is mainly determined by water molecule diffusion in the confined pores.
Article
Engineering, Chemical
Qing Han, Mengqing Shi, Linkai Han, Di Liu, Mingwei Tong, Yuxin Xie, Zhonghua Xiang
Summary: Developing highly efficient bifunctional oxygen electrocatalysts is crucial for zinc-air flow batteries. Metal-organic frameworks (MOFs) and covalent organic polymers (COPs) have emerged as promising alternatives due to their designable and controllable atomic-level structures. However, their catalytic performances are limited by conductivity and catalytic activity. In this study, nanosheet FeNi-MOF and iron phthalocyanine rich COP hybrid materials are assembled through the pi-pi stacking effect to create highly efficient bifunctional electrocatalysts. The resulting catalyst exhibits superior catalytic performance and stability, making it a promising candidate for zinc-air flow batteries.
CHEMICAL ENGINEERING SCIENCE
(2024)
Article
Engineering, Chemical
Daria Grigorash, Dmytro Mihrin, Rene Wugt Larsen, Erling H. Stenby, Wei Yan
Summary: The article introduces a new approach to describe the cross-association between molecules, allowing for the simulation of weakly bound molecular complexes with different conformations in mixtures. By incorporating this approach into the equation of state, accurate predictions of vapor-liquid equilibrium and liquid-liquid equilibrium can be made. The new method is validated through experiments on alcohol and acid mixtures, with the results compared to experimental data, demonstrating its accuracy and reliability.
CHEMICAL ENGINEERING SCIENCE
(2024)
Article
Engineering, Chemical
Mohammed Al-Sharabi, Daniel Markl, Vincenzino Vivacqua, Prince Bawuah, Natalie Maclean, Andrew P. E. York, Axel Zeitler
Summary: This study used terahertz pulsed imaging to investigate the transport process of different solvents into ceramic catalytic materials. The results showed that the heating rate of the samples influenced the water transport rate, while the viscosity of 1-octanol slowed down its transport.
CHEMICAL ENGINEERING SCIENCE
(2024)
Article
Engineering, Chemical
Chukwunonso Anyaoku, Sati Bhattacharya, Rajarathinam Parthasarathy
Summary: This study aimed to enhance understanding of settling dynamics in viscoelastic fluids by developing a semi-empirical correlation and a dimensionless ratio, which accurately described the characteristics of settling suspensions.
CHEMICAL ENGINEERING SCIENCE
(2024)
Article
Engineering, Chemical
Antti I. Koponen, Janika Viitala, Atsushi Tanaka, Baranivignesh Prakash, Olli-Ville Laukkanen, Ari Jasberg
Summary: This study focuses on the development of foam application chemicals for the paper and board industry. The research explores the rheology of the polyvinyl alcohol foam used in the process. Measurements were conducted to determine the foam viscosity and slip flow. The results suggest that slip flow contributes significantly to the total flow rate, and the obtained viscosity and slip models provide a solid foundation for industrial processes.
CHEMICAL ENGINEERING SCIENCE
(2024)
Article
Engineering, Chemical
Dalei Sun, Jinghui Cai, Yating Yang, Zhiwu Liang
Summary: In this study, Fe-doped alpha-Bi2O3 catalysts with different Fe/Bi molar ratios were synthesized and utilized in the carbonylation of isobutyl amine with CO2. The results showed that Fe doping significantly enhanced the catalytic abilities of alpha-Bi2O3.
CHEMICAL ENGINEERING SCIENCE
(2024)
Article
Engineering, Chemical
Yuan Tian, Xinxin Wang, Yanrong Liu, Wenping Hu
Summary: This paper predicts the solubility of nitrogen gas in ionic liquids (ILs) using two quantitative structure-property relationship (QSPR) models. By combining machine learning methods and ionic fragments contribution method, the accuracy and reliability of the prediction models are improved.
CHEMICAL ENGINEERING SCIENCE
(2024)
Article
Engineering, Chemical
Liwang Wang, Wei Liu, Pan Yang, Yulong Chang, Xiaoxu Duan, Lingyu Xiao, Yaoming Hu, Jiwei Wu, Liang Ma, Hualin Wang
Summary: This study investigates the effective phase interfacial area (ae) of hydro-jet cyclones at different injection angles. The results show that a 45 degrees upward incidence angle yields the most favorable flow field characteristics for efficient mass transfer. The significant enhancement in ae of the hydro-jet cyclones offers the advantage of reducing equipment volume and cost savings.
CHEMICAL ENGINEERING SCIENCE
(2024)
Article
Engineering, Chemical
Chuanjun Wu, Jiangzhi Chen, Jiyue Sun, I-Ming Chou, Shenghua Mei, Juezhi Lin, Lei Jiang
Summary: In this study, the solubility of H2S hydrate in water was measured using Raman spectroscopy. The results showed that the solubility increases with temperature under certain equilibrium conditions, and the solubility also depends on pressure and temperature under different equilibrium conditions. A thermodynamic model based on the van der Waals-Platteeuw theory was developed to predict the solubility, demonstrating its accuracy.
CHEMICAL ENGINEERING SCIENCE
(2024)
Article
Engineering, Chemical
Lorenzo Brivio, Serena Meini, Mattia Sponchioni, Davide Moscatelli
Summary: This study investigates the influence of three main parameters and proposes a kinetic model to predict the optimal operating conditions for high yield of dimethyl terephthalate (DMT) in the chemical recycling process of polyethylene terephthalate (PET).
CHEMICAL ENGINEERING SCIENCE
(2024)
Article
Engineering, Chemical
Hongju Lin, Fanhui Liao, Yanchang Chu, Mingyu Xie, Lun Pan, Yuanyuan Wang, Lijian Leng, Donghai Xu, Le Yang, Gangfeng Ouyang
Summary: A honeycomb NiCo/C-Na catalyst with a micro-meso-macroporous structure has been fabricated and shown to have significantly higher catalytic activity for the decarboxylation of fatty acids. It also proves to be efficient in upgrading sludge HTL bio-crude, resulting in a biofuel with decreased viscosity and increased density.
CHEMICAL ENGINEERING SCIENCE
(2024)
Article
Engineering, Chemical
Xiaoxian Li, Rui Li, Min Lin, Mingde Yang, Yulong Wu
Summary: A series of coated non-noble metal porous carbon catalysts were synthesized and applied to the aqueous-phase deoxygenation of algal bio-oil. One of the catalysts showed excellent deoxygenation selectivity and catalytic activity at 250 degrees C. The catalyst exhibited good hydrothermal stability and the reaction mechanism was proposed based on product analysis and active site analysis.
CHEMICAL ENGINEERING SCIENCE
(2024)
Article
Engineering, Chemical
M. V. Chudakova, M. V. Popov, P. A. Korovchenko, E. O. Pentsak, A. R. Latypova, P. B. Kurmashov, A. A. Pimenov, E. A. Tsilimbaeva, I. S. Levin, A. G. Bannov, A. V. Kleymenov
Summary: A series of catalysts with different potassium contents were prepared using solution combustion synthesis and characterized using various techniques. The results showed that the potassium content affected the phase composition and texture of the catalysts. The addition of a small amount of potassium resulted in a change in particle size distribution, leading to higher hydrogen yield. The Ni-1%K2O/Al2O3 catalyst exhibited the highest hydrogen yield at temperatures of 675 and 750 degrees Celsius.
CHEMICAL ENGINEERING SCIENCE
(2024)
Article
Engineering, Chemical
Aliakbar Roosta, Nima Rezaei
Summary: In this study, we modified the electrolyte cubic plus association equation of state (e-CPA EoS) and integrated it with two electrical conductivity models to estimate the electrical conductivity of 11 monovalent electrolyte solutions in water. The modified e-CPA model demonstrated better performance and the hybridization with electrical conductivity models resulted in two predictive models for estimating the electrical conduction of dilute and concentrated electrolyte solutions. These predictive models showed relative average percentage deviations (AARD) of 11.15% and 13.87% over wide ranges of temperature and electrolyte concentration.
CHEMICAL ENGINEERING SCIENCE
(2024)
Article
Engineering, Chemical
Haoren Niu, Jianzheng Wang, Qingzhu Jia, Qiang Wang, Jin Zhao, Fangyou Yan
Summary: A study developed two quantitative structure-property relationship models for the complexation performance of alpha- and beta-cyclodextrins and validated their stability and predictive ability through internal and external validation. The models showed robustness and satisfactory performance, as demonstrated by the experimental results and model validations. These models can effectively predict the binding constants between cyclodextrins and various types of molecules, providing valuable tools for cyclodextrin design.
CHEMICAL ENGINEERING SCIENCE
(2024)