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.
Review
Chemistry, Multidisciplinary
Ihtisham Ul Haq, Ali Qasim, Bhajan Lal, Dzulkarnain B. Zaini, Khor Siak Foo, Muhammad Mubashir, Kuan Shiong Khoo, Dai-Viet N. Vo, Eric Leroy, Pau Loke Show
Summary: The formation of gas hydrates is a significant issue in oil and gas pipelines, as they cause blockage and disrupt normal flow. Injecting ionic liquids as hydrate inhibitors is a solution, and imidazolium-based ionic liquids have been found effective. These inhibitors act as thermodynamic inhibitors, hydrate inhibitors, and anti-agglomerates.
ENVIRONMENTAL CHEMISTRY LETTERS
(2022)
Review
Energy & Fuels
Qian Zhang, Malcolm A. Kelland, Hailong Lu
Summary: Kinetic hydrate inhibitors (KHIs) have been used for decades to solve the hydrate formation problem in oil and gas flowlines. Traditional amide-based polymers have been supplemented by non-amide KHIs, including amine-based, amine oxide-based, phosphonate-based, sulfonate-based, hydroxyl-based, acrylate-based, and urethane-based KHIs. The inhibition performance of non-amide polymers is related to their chemical structures and the hydrophobic groups connected to the functional groups. Non-amide KHIs with suitable hydrophobic groups show better inhibition performance than some commercial amide-containing KHIs.
Article
Chemistry, Multidisciplinary
Cuiping Tang, Abdolreza Farhadian, Avni Berisha, Mohamed A. Deyab, Jie Chen, Danial Iravani, Alireza Rahimi, Zhengcai Zhang, Deqing Liang
Summary: Gas hydrate and corrosion inhibitors are commonly used in oil and gas pipelines to ensure smooth flow, but compatibility issues arise when they are co-injected. Using anti-agglomerant hydrate inhibitors is an effective method to control gas hydrate plugging in deep-water hydrocarbon flow lines or drilling operations.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2022)
Article
Energy & Fuels
Maryam Seif, Arash Kamran Pirzaman, Bhajan Lal, Cornelius B. Bavoh
Summary: This study aims to develop a reliable and convenient model, based on the Dickens and Quinby-Hunt approach, to predict the equilibrium temperature of CH4/CO2 gas hydrates in the presence of organic and electrolyte inhibitors. The model, named Dickens' model, utilizes the NRTL and Margules methods to calculate the water activity of organic solutions, as well as the Pitzer model to calculate the water activity of electrolyte solutions. The results of the model are in good agreement with experimental data from the literature.
PETROLEUM SCIENCE AND TECHNOLOGY
(2023)
Article
Engineering, Chemical
Qian Zhang, Malcolm A. Kelland
Summary: Kinetic hydrate inhibitors (KHIs) have been used for over 25 years in oil and gas production flowlines to prevent gas hydrate formation. The main component in KHI formulations is a water-soluble polymer, with polymaleamides showing significant performance enhancement in inhibiting gas hydrate formation. Studies have improved our understanding of the optimal structural features for KHI polymers.
CHEMICAL ENGINEERING SCIENCE
(2021)
Article
Chemistry, Physical
Ihtisham Ul Haq, Bhajan Lal, Dzulkarnain B. Zaini
Summary: The thermodynamic hydrate inhibition behavior of two ammonium based ionic liquids (AIL) and their mixtures with methanol for CO2 hydrates was studied. The results show that TMABF(4) and TMABF(4) + methanol exhibit higher thermodynamic hydrate inhibition effect compared to TEABF(4), indicating their potential application in flow assurance.
JOURNAL OF MOLECULAR LIQUIDS
(2022)
Article
Chemistry, Multidisciplinary
Riku Matsuura, Saman Alavi, Ryo Ohmura
Summary: This study presents visual observations of the formation and growth of structure-H hydrate formed with methane and 1-methylpiperidine (MPD). The crystal growth dynamics were categorized into two types depending on the subcooling temperature, showing changes in crystal shape and size with different subcooling conditions. The implications of crystal morphology on suitable conditions for industrial utilization of this hydrate for gas capture applications are discussed.
CRYSTAL GROWTH & DESIGN
(2021)
Article
Environmental Sciences
Zhiwei Zhu, Yuncheng Cao, Zihan Zheng, Nengyou Wu, Duofu Chen
Summary: This study applied the van der Waals-Platteeuw model to investigate the formation of CH4-H-2 hydrates in marine serpentinization environments, taking into account the effects of salinity. The model accurately predicted the three-phase equilibrium temperature and pressure for CH4-H-2 hydrates in pure water and provided theoretical insights for gas hydrate research in areas with marine serpentinization.
FRONTIERS IN MARINE SCIENCE
(2023)
Article
Energy & Fuels
Zheng Liu, Baojiang Sun, Zhiyuan Wang, Jianbo Zhang, Xuerui Wang
Summary: A model was established to predict the risk of hydrate reformation in production pipelines during offshore gas hydrate development, studying the region and higher-risk drainage pipe. A new hydrate management strategy by adding additional pumps and heaters was proposed to effectively address potential hydrate reformation risks.
Article
Chemistry, Physical
Ningru Sun, Yanjun Li, Nianxiang Qiu, Joseph S. Francisco, Shiyu Du
Summary: Hydrate Based Gas Separation (HBGS) technology is being developed as a solution for air pollution caused by flue gas. The study shows that the presence of H2S, SO2, and N2O in mixed gases can promote the formation of CO2 hydrate, and the ratio between CO2 and impurity gases can predict the gas recovery yield under different conditions.
JOURNAL OF MOLECULAR LIQUIDS
(2023)
Article
Engineering, Chemical
Fanny Thomas, Didier Dalmazzone, Jeffrey F. Morris
Summary: The wetting characteristics of ice-like clathrate hydrates at atmospheric pressure were studied using a new experimental method to measure the contact angle of various liquids. The results showed that the hydrate surface is water-wetting.
CHEMICAL ENGINEERING SCIENCE
(2021)
Article
Energy & Fuels
Na Wei, Cuiying Xie, Wantong Sun, Haitao Li, Lin Jiang, Shenghui Zhang
Summary: Gas hydrates formed under high pressure and low temperature conditions can seriously impact the safety of drilling and completion operations, as well as marine equipment, particularly in the process of oil and gas transportation. Therefore, the use of thermodynamic inhibitors to prevent the formation of natural gas hydrate (NGH) has become crucial in the oil and gas industry. Experimental research has shown that the addition of inhibitors can reduce the formation temperature of NGH and increase the induction time, ultimately mitigating the potential risks associated with hydrate formation during oil and gas production and transportation.
FRONTIERS IN ENERGY RESEARCH
(2021)
Article
Engineering, Environmental
Abdolreza Farhadian, Parisa Naeiji, Mikhail A. Varfolomeev, Kiana Peyvandi, Airat G. Kiiamov
Summary: The study identified a gap in knowledge regarding the effect of micellization on hydrate formation, showing that waterborne polyurea/urethanes do not promote methane hydrate formation unlike SDS. The molecular structure of additives plays a crucial role in determining the inhibition effect of their micelles on hydrate formation.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Chemistry, Physical
Mohammad M. Ghiasi, Amir H. Mohammadi, Sohrab Zendehboudi
Summary: This study modeled the three-phase equilibria of methane hydrate in IL aqueous solutions using LSSVM, ANFIS, and CART models, revealing that the LSSVM approach outperforms CART and ANFIS models in representing dissociation temperatures. The findings suggest that the effects of ILs on methane hydrate stability conditions can aid in effective hydrate management.
JOURNAL OF MOLECULAR LIQUIDS
(2021)
Article
Thermodynamics
Jong-Ho Cha, Chihyeon Ha, Songlee Han, Yeon Ki Hong, Seong-Pil Kang, Jeong Won Kang, Ki-Sub Kim
JOURNAL OF CHEMICAL AND ENGINEERING DATA
(2016)
Article
Engineering, Chemical
Seong-Pil Kang, Taesung Jung, Jong-Won Lee
CHEMICAL ENGINEERING SCIENCE
(2016)
Article
Energy & Fuels
Wonhee Lee, Ju-Young Shin, Ki-Sub Kim, Seong-Pil Kang
Article
Energy & Fuels
Wonhee Lee, Ju-Young Shin, Ki-Sub Kim, Seong-Pil Kang
Article
Thermodynamics
Jong-Ho Cha, Seong-Pil Kang, Songlee Han, Jeong Won Kang, Ki-Sub Kim
FLUID PHASE EQUILIBRIA
(2016)
Article
Energy & Fuels
Jakyung Kim, Hyunho Kim, Young Hoon Sohn, Daejun Chang, Yutaek Seo, Seong-Pil Kang
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2017)
Article
Engineering, Environmental
Wonhee Lee, Yeon-Soo Kim, Seong-Pil Kang
CHEMICAL ENGINEERING JOURNAL
(2018)
Article
Energy & Fuels
Wonhee Lee, Ki-Sub Kim, Seong-Pil Kang, Jong-Nam Kim
Article
Energy & Fuels
Seong-Pil Kang, Dongwon Lee, Jong-Won Lee
Article
Energy & Fuels
Wonhee Lee, Youngil Choi, Yeonggyu Kim, Jong-Se Lim, Seong-Pil Kang
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2019)
Article
Engineering, Chemical
Songlee Han, Murali Kannan Maruthamuthu, Wonhee Lee, Soon Ho Hong, Seong-Pil Kang
CHEMICAL ENGINEERING SCIENCE
(2020)
Editorial Material
Energy & Fuels
Wonhee Lee, Seong-Pil Kang
Summary: The paper examined the desalination application of TBAB semiclathrate hydrates, concluding that TBAB hydrate formation is a favorable method for desalination, but failed to consider the possible effects of other co-existing anions.
Article
Engineering, Chemical
Jeongtak Kim, Byeonggwan Lee, Kyuchul Shin, Seong-Pil Kang, Ki Hun Park, Minjun Cha, Saman Alavi, John A. Ripmeester
Summary: It was found that water-NH4F solutions can form clathrates consisting of solid solutions of water and NH4F, which have the same structure as the canonical clathrate hydrates, and can incorporate different guest molecules such as methanol. The research provides insight into the potential of NH4F-doped hydrate lattice, aided by catalytic methanol, for use in hydrate-based gas separation processes.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2021)
Article
Engineering, Chemical
Songlee Han, Young-Woo Rhee, Seong-Pil Kang
Article
Thermodynamics
Haolei Yang, Xiaoqiang Bian, Lianguo Wang
Summary: A new association model, CPA-MHV1, combining the SRK equation of state with the CPA equation based on Michelsen's improved Huron-Vidal mixing rule, is developed. The model is used to investigate the vapor-liquid equilibrium of binary mixtures involving CH4, CO2, and H2O, as well as ternary mixtures containing NaCl. The results show that considering the solvation between CO2 and H2O yields the best performance, while CH4 with a pseudo-association scheme has the highest comprehensive prediction performance.
FLUID PHASE EQUILIBRIA
(2024)
Article
Thermodynamics
Vikas K. Sinha, Atanu K. Metya, Chandan K. Das
Summary: In this study, the solid-liquid coexistence curve for water was developed using coarse-grained mW and machine-learned ML-BOP water models. The ML-BOP model exhibited lower densities, a broader density-temperature hysteresis loop, and higher free energy compared to the mW model. The pressure dependence fusion curve for both models aligned with previous literature. This analysis demonstrates that the free energy method accurately captures the solid-liquid transformation and the thermodynamic melting point of water.
FLUID PHASE EQUILIBRIA
(2024)
Article
Thermodynamics
Curtis Hays Whitson
Summary: This article tells the story of an extraordinary individual who made numerous and valued contributions, portrayed through a few images and short stories.
FLUID PHASE EQUILIBRIA
(2024)
Article
Thermodynamics
Joe Hajjar, Sabine Enders
Summary: A generalized theoretical framework is introduced for multicomponent reactive nonuniform systems, combining the modified and generalized Cahn-Hilliard equation with a chemical kinetics model. The framework allows for the modelling and investigation of the combined reaction and diffusion in reactive liquid-liquid systems. It is found that for reacting mixtures with much smaller reaction rates than diffusion rates, the mixture will remain in phase equilibrium upon reaction and the interfacial chemical reaction will not affect the overall system dynamics, which are only influenced by the kinetics of the bulk phases.
FLUID PHASE EQUILIBRIA
(2024)
Article
Thermodynamics
Keycianne da Cruz Silva, Leticia Daniela de Souza, Vinicius Azevedo Gomes, Leandro Rodrigues de Lemos
Summary: Phase diagrams of four aqueous two-phase systems were determined experimentally, and conclusions were drawn regarding the effect of temperature on system enthalpy change and the influence of macromolecules on phase separation.
FLUID PHASE EQUILIBRIA
(2024)
Article
Thermodynamics
Yuanqing Wu, Shuyu Sun
Summary: The sparse-grid guided PINN training method improves the accuracy of the PINN surrogate model by rearranging collocation points and reduces the training time complexity. Experimental results demonstrate its clear advantages in terms of convergence, stability, and accuracy.
FLUID PHASE EQUILIBRIA
(2024)
Article
Thermodynamics
Peter Englezos
Summary: This article discusses the research progress and challenges in the field of canonical clathrate or gas hydrate phase equilibria, as well as the application of computational methods and models. It also explores the potential of machine learning techniques in hydrate and thermodynamic calculations.
FLUID PHASE EQUILIBRIA
(2024)
Article
Thermodynamics
Ying-Chieh Hung, Shao-Wei Su, Jia-Wei Yan, Gui-Bing Hong
Summary: In this study, VLE data for five binary systems were measured and successfully correlated using models. The predictive models were used to predict the binary VLE phase diagram and explain the mechanism of separation efficiency. The strength of electrostatic interactions and temperature-dependent separation behavior were determined through the analysis of molecular surface charge distribution.
FLUID PHASE EQUILIBRIA
(2024)
Article
Thermodynamics
Matevz Turk, Tomaz Urbic
Summary: By molecular dynamics and Monte Carlo simulations, this study determined the regions and hierarchy of anomalies in a purely repulsive core-softened system. It was found that in two dimensional systems, a size of 100 particles is sufficient for obtaining accurate details.
FLUID PHASE EQUILIBRIA
(2024)
Article
Thermodynamics
Adnan Jaradat, Rakan Al-Salman, Abdalla Obeidat
Summary: The vapor-liquid equilibrium of six primary alcohols were studied using molecular dynamics simulations and compared with experimental results. The study found that neglecting the Lennard-Jones interaction significantly reduced the critical temperature values and determining the critical temperature using surface tension gave more accurate results. The TraPPE-UA potential field showed good accuracy in predicting the critical temperature.
FLUID PHASE EQUILIBRIA
(2024)
Article
Thermodynamics
Michele Valsecchi, Amparo Galindo, George Jackson
Summary: The thermodynamic properties of aqueous mixtures of polyethylene glycol (PEG) are described using the SAFT-gamma Mie group-contribution equation of state. The model successfully predicts the miscibility gaps in a temperature range and shows good agreement with experimental results.
FLUID PHASE EQUILIBRIA
(2024)
Article
Thermodynamics
Roman Tomaschitz
Summary: Analytic closed-form expressions for the liquid and vapor saturation densities defining the coexistence curve are obtained. The coexistence curves of nitrogen, ethene, and sulfur hexafluoride are derived using high-precision data, and the critical power-law scaling of the order parameter and coexistence-curve diameter is examined. The Log-Log slopes of various quantities are used to determine the ideal power-law scaling regime and illustrate the slope evolution in the subcritical regime.
FLUID PHASE EQUILIBRIA
(2024)
Article
Thermodynamics
Nivaar Brijmohan, Kuveneshan Moodley, Caleb Narasigadu
Summary: An artificial neural network-based QSPR model was developed to estimate binary interaction parameters for the temperature-dependant form of the NRTL model. This model serves as a supplement to overcome limitations of group contribution methods in solvent screening and has been proven to be effective in improving the robustness of the screening process.
FLUID PHASE EQUILIBRIA
(2024)
Article
Thermodynamics
Marco Campestrini, Paolo Stringari, Salem Hoceini
Summary: In this paper, the solubility of benzene in different phases of methane was predicted using the GERG-2008 equation of state and the Gibbs free energy equation. The obtained results were in good agreement with experimental data and emphasized the significance of accurately representing the density of the fluid phase for predicting the solubility of solids in fluids.
FLUID PHASE EQUILIBRIA
(2024)
Article
Thermodynamics
Nefeli Novak, Georgios M. Kontogeorgis, Marcelo Castier, Ioannis G. Economou
Summary: This paper discusses theoretical considerations on electrolyte thermodynamic models for single and mixed solvent solutions. The authors find that there is no consensus among researchers on many fundamental issues in this field. They point out the need to convert electrolyte terms to the framework of the physical model and emphasize the importance of the Born term for liquid-liquid equilibrium calculations.
FLUID PHASE EQUILIBRIA
(2024)