Article
Thermodynamics
Randi Neerup, Sebastian N. B. Villadsen, Kaj Thomsen, Philip L. Fosbol
Summary: In this study, the solubility and density of NaHCO3 in four glycol-water systems were measured. The solubility of NaHCO3 in all glycol mixtures increases with increasing temperatures, with local minima observed in the concentration range of 80-90 wt % glycol. The density results show a linear increase up to approximately 80 wt % glycol concentration, with minima observed above 80 wt %.
JOURNAL OF CHEMICAL AND ENGINEERING DATA
(2021)
Article
Engineering, Chemical
Anton P. Semenov, Yinghua Gong, Vladimir I. Medvedev, Andrey S. Stoporev, Vladimir A. Istomin, Vladimir A. Vinokurov, Tianduo Li
Summary: Gas hydrate inhibition is an important topic in flow assurance. The hybrid inhibition strategy involving kinetic hydrate inhibitors (KHIs) and thermodynamic hydrate inhibitors (THIs) has been developed through extensive experimental studies. Methane hydrate equilibrium conditions were determined for aqueous solutions of methanol, MEG, and DEG (<50 mass%). The kinetics of methane hydrate nucleation and growth were studied for aqueous solutions of commercial vinyl lactam KHI and its blends with alcohols. A blend of KHI and MEG is optimal for hybrid inhibition, showing enhanced delay of gas uptake and reduced rate of methane hydrate growth.
CHEMICAL ENGINEERING SCIENCE
(2023)
Article
Chemistry, Multidisciplinary
Xiluo Hao, Chengfeng Li, Qingguo Meng, Jianye Sun, Li Huang, Qingtao Bu, Congying Li
Summary: The three-phase coexistence line of CO2 hydrate was determined using molecular dynamics simulations. The influence of the water model on the equilibrium prediction was found to be greater than that of the CO2 model. Adjusting the parameters based on the solubility of CO2 in water improved the accuracy of the simulations.
Article
Thermodynamics
Sanehiro Muromachi, Kiyofumi Suzuki, Norio Tenma
Summary: This study reports phase equilibrium data for urea + methane + water and urea + carbon dioxide + water systems, and finds that urea can be used as a thermodynamic hydrate inhibitor in subsea methane hydrate systems. The inhibition effect of urea is slightly weaker than that of methanol, but it can reach applicable hydrate inhibition temperatures under specific conditions. Based on the present equilibrium data and seafloor conditions, urea can be used for methane gas production and hydrate-based carbon capture and storage systems.
FLUID PHASE EQUILIBRIA
(2023)
Article
Energy & Fuels
Sareh Hamidpour, Jafar Javanmardi, Ali Rasoolzadeh, Amir H. Mohammadi
Summary: This study aimed to determine the complete inhibition region (CIR) of methane hydrate in the presence of triethylene glycol (TEG) as a thermodynamic hydrate inhibitor (THI) and polyvinyl caprolactam (PVCap-7k) as a low-dosage hydrate inhibitor (LDHI). It was found that the combined utilization of TEG and PVCap-7k has a thermodynamic promotion effect on methane hydrate and leads to a wide CIR with strong kinetic inhibition performance.
Article
Thermodynamics
Nabaparna Chakraborty, K. C. Juglan, Harsh Kumar
Summary: Acoustic and volumetric parameters of a liquid mixture containing water, biotin, and various ethylene glycols were evaluated at different temperatures. Experimental data was used to calculate various thermodynamic properties, providing insights into molecular interactions in the mixture.
JOURNAL OF CHEMICAL THERMODYNAMICS
(2021)
Article
Energy & Fuels
Hari Prakash Veluswamy, Praveen Linga
Summary: The study investigated the impact of salt on the kinetics of natural gas hydrate formation, showing that the presence of salt significantly slows down the formation rate of mixed natural gas hydrate and delays the completion time.
Article
Energy & Fuels
Ajay Suri, Ankur Singh
Summary: This paper investigates the synergy between three kinetic hydrate inhibitors (KHIs) and a common solvent. The results show that the performance of the inhibitors is greatly enhanced when blended with the solvent, with the best performance achieved within a certain concentration range. The blends outperform the individual inhibitors and are environmentally friendly.
Article
Energy & Fuels
Ankur Singh, Ajay Suri
Summary: Before injecting any kinetic hydrate inhibitor (KHI) into a flow line, it is necessary to dissolve the KHI, which is usually a polymer, in a suitable solvent such as water, methanol, or glycol. This study investigates the synergistic effect of three KHIs (PVP, PVCap, and Pectin) with monoethylene glycol (MEG) as the solvent. The results show that blending MEG with the KHIs significantly enhances hydrate inhibition, with Pectin-MEG blend demonstrating the best performance.
Article
Chemistry, Multidisciplinary
Sepehr Keshvari, Saeid Abedi Farizhendi, Mohammad M. Ghiasi, Amir H. Mohammadi
Summary: The use of AdaBoost metalearning methodology in combination with tree-based models has successfully estimated the equilibrium dissociation temperature of clathrate hydrates, providing more reliable results compared to other methods.
Article
Energy & Fuels
Ye Zhang, Gaurav Bhattacharjee, Mohana Dharshini Vijayakumar, Praveen Linga
Summary: Gas storage technologies are important for energy security and resilience. The use of clathrate hydrates, specifically Solidified Natural Gas (SNG), for natural gas storage is attractive due to its non-explosive nature and high volume density. Recent research has shown that the additive 1,3-dioxolane (DIOX) can improve the thermodynamic and kinetic performance of hydrate formation.
Article
Chemistry, Physical
Khayyam Mehrabi, Jafar Javanmardi, Ali Rasoolzadeh, Amir H. Mohammadi
Summary: This study experimentally measured the dissociation conditions of methane hydrates in the presence of diethanolamine (DEA) and diethanolamine + ethylene glycol (EG) aqueous solutions. It was found that DEA thermodynamically inhibits methane hydrate formation, shifting stability temperatures by about 4.2 K. Although DEA is weaker than EG, it can still be used as a gas sweetening agent and hydrate inhibitor.
JOURNAL OF MOLECULAR LIQUIDS
(2021)
Article
Energy & Fuels
Yang Liu, Cong Chen, Zherui Chen, Weizhong Li, Yan Qin, Bo Dong
Summary: In this study, molecular dynamics simulations were used to investigate the impact of NaCl, KCl, and ethylene glycol on hydrate growth. It was found that these thermodynamic inhibitors delayed the accelerated growth stage of hydrate, reduced the growth rate, and lowered the methane concentration in the water solution. The ions of NaCl and KCl behaved differently during the growth stage while ethylene glycol molecules tended to occupy specific cages and occur in pairs or clusters. Additionally, the inhibitors exhibited a dual role of inhibition in the growth stage and destruction in the impingement stage.
Article
Energy & Fuels
Changrui Shi, Shuai Wang, Huiquan Liu, Lunxiang Zhang, Mingjun Yang, Yongchen Song, Jiafei Zhao, Zheng Ling
Summary: This study presents a simple and scalable strategy to produce aerogels as efficient promoters for methane hydrate formation. The as-made aerogels significantly improve the formation kinetics of methane hydrate and show high storage capacity and cycling stability. The study also investigates the molecular mechanisms behind the enhanced formation of methane hydrate through the interaction between oxygen-containing surface functional groups and water molecules.
Article
Thermodynamics
Julia Trancoso, Daniel Qvistgaard, Marie V. Danielsen, Eleni Panteli, Even Solbraa, Georgios M. Kontogeorgis, Nicolas von Solms
Summary: This study measured vapor-liquid equilibrium data for the system triethylene glycol + water + methane under different conditions, expanding the experimental database for subsea gas processing technologies. A comparison with literature data revealed inconsistencies in one data set. The cubic-plus-association (CPA) equation-of-state modeling capability was reevaluated in this study.
JOURNAL OF CHEMICAL AND ENGINEERING DATA
(2022)
Article
Thermodynamics
Shalendra Clinton Subramoney, Wayne Michael Nelson, Paramespri Naidoo, Christophe Coquelet, Dominique Richon, Deresh Ramjugernath
FLUID PHASE EQUILIBRIA
(2015)
Article
Thermodynamics
Shalendra Clinton Subramoney, Wayne Michael Nelson, Paramespri Naidoo, Christophe Coquelet, Dominique Richon, Deresh Ramjugernath
FLUID PHASE EQUILIBRIA
(2015)
Article
Thermodynamics
Muhammad Saad Qureshi, Petri Uusi-Kyyny, Dominique Richon, Kaj Nikiforow, Ville Alopaeus
FLUID PHASE EQUILIBRIA
(2015)
Article
Thermodynamics
Peterson Thokozani Ngema, Paramespri Naidoo, Amir H. Mohammadi, Dominique Richon, Deresh Ramjugernath
FLUID PHASE EQUILIBRIA
(2016)
Article
Thermodynamics
Mohamed Kamel Hadj-Kali, Salim Mokraoui, Olivier Baudouin, Quentin Duval, Dominique Richon
FLUID PHASE EQUILIBRIA
(2016)
Article
Thermodynamics
Petri Uusi-Kyyny, Simona Ionita, Muhammad Saad Qureshi, Ville Alopaeus, Dominique Richon
JOURNAL OF CHEMICAL AND ENGINEERING DATA
(2016)
Article
Thermodynamics
Peterson Thokozani Ngema, Paramespri Naidoo, Amir H. Mohammadi, Dominique Richon, Deresh Ramjugernath
JOURNAL OF CHEMICAL AND ENGINEERING DATA
(2016)
Article
Thermodynamics
Muhammad Saad Qureshi, Jouni Touronen, Petri Uusi-Kyyny, Dominique Richon, Ville Alopaeus
JOURNAL OF CHEMICAL THERMODYNAMICS
(2016)
Article
Thermodynamics
Mikael Mannisto, Petri Uusi-Kyyny, Dominique Richon, Ville Alopaeus
JOURNAL OF CHEMICAL AND ENGINEERING DATA
(2017)
Article
Thermodynamics
Deresh Ramjugernath, Alain Valtz, Dominique Richon, Mark D. Williams-Wynn, Christophe Coquelet
JOURNAL OF CHEMICAL AND ENGINEERING DATA
(2017)
Article
Thermodynamics
Muhammad Saad Qureshi, Tom Le Nedelec, Hernando Guerrero-Amaya, Petri Uusi-Kyyny, Dominique Richon, Ville Alopaeus
JOURNAL OF CHEMICAL THERMODYNAMICS
(2017)
Article
Thermodynamics
Deresh Ramjugernath, Alain Valtz, Dominique Richon, Mark D. Williams-Wynn, Christophe Coquelet
JOURNAL OF CHEMICAL AND ENGINEERING DATA
(2018)
Article
Engineering, Chemical
Mohamed K. Hadj-Kali, Mamoun Althuluth, Salim Mokraoui, Irfan Wazeer, Emad Ali, Dominique Richon
CHEMICAL ENGINEERING COMMUNICATIONS
(2020)
Article
Engineering, Chemical
Petri Uusi-Kyyny, Muhammad Saad Qureshi, Juha-Pekka Pokki, Ville Alopaeus, Dominique Richon
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2019)
Article
Thermodynamics
Jouni Touronen, Mikael Mannisto, Dominique Richon, Petri Uusi-Kyyny, Ville Alopaeus
JOURNAL OF CHEMICAL AND ENGINEERING DATA
(2020)