Article
Energy & Fuels
Moumita Maiti, Prathibha Pillai, Aniruddha Sharma, Ajoy Kumar Bhaumik, Ajay Mandal
Summary: This study investigates the effect of two ionic liquids on the formation and dissociation of gas hydrates and finds that they are effective inhibitors. The inhibition performance of the ionic liquids increases with increasing alkyl chain length.
Article
Energy & Fuels
Moumita Maiti, Prathibha Pillai, Aniruddha Sharma, Ajoy Kumar Bhaumik, Ajay Mandal
Summary: In this study, the effect of two ionic liquids on the formation and dissociation of hydrates was investigated. The results showed that these ionic liquids were effective in inhibiting hydrate formation both thermodynamically and kinetically. The induction time and formation rate of hydrates were significantly increased in the presence of these ionic liquids compared to pure water. Additionally, the performance of the ionic liquids in hydrate inhibition increased with increasing alkyl chain length.
Article
Chemistry, Physical
Zhi Li, Yue Zhang, Yimao Shen, Xiaodeng Yang, Tianduo Li, Guangjin Chen
Summary: This study synthesized chitosan derivatives with different hydrophilic/hydrophobic properties and compared them with carboxymethyl chitosan derivatives to investigate their relationship with methane hydrate. The experimental results showed that the inhibitory effects of chitosan derivatives were significantly better than carboxymethyl chitosan derivatives. The length and properties of the chitosan derivatives' branched chains played a vital role in hydrate inhibition. Gas-induced agitation provided insights into the hydrate inhibition mechanism of chitosan derivatives.
JOURNAL OF MOLECULAR LIQUIDS
(2022)
Article
Energy & Fuels
Bo Liao, Jintang Wang, Jinsheng Sun, Kaihe Lv, Lei Liu, Qi Wang, Ren Wang, Xindi Lv, Yudou Wang, Zhangxin Chen
Summary: Studying the synergism effect of different hydrate inhibitors on methane hydrate formation is crucial for developing new gas hydrate inhibitors and drilling and completion fluid systems.
Article
Energy & Fuels
Hanie Mohsenzade, Shima Foroutan, Ali Dashti, Navid Ramezanian, Hadi Roosta
Summary: In this study, poly(N-vinylcaprolactam)s were synthesized as potent kinetic hydrate inhibitors, with modifications such as 3-mercaptopropionic acid and mercaptoacetic acid showing superior performance in reducing the growth rate of structure I and structure II hydrates. The synthesized polymers also outperformed commercial products in delaying induction time and increasing relative inhibition power values.
Article
Chemistry, Physical
Liwei Cheng, Zhi Li, Jinlong Cui, Ran Zhu, Jia Li, Huibo Qin, Bei Liu, Guangjin Chen, Fulong Ning
Summary: As an important hydrate control method, kinetic hydrate inhibitors (KHIs) have gained extensive attention in the oil and gas industry. The addition of synergistic reagents with high efficiency to improve the inhibition performance of KHIs is of great significance for the prevention and treatment of hydrates.
JOURNAL OF MOLECULAR LIQUIDS
(2023)
Article
Energy & Fuels
Ankur Singh, Ajay Suri
Summary: Hydrate formation experiments were conducted to evaluate the synergy between three natural proteins and four standard reference kinetic hydrate inhibitors. The results showed that casein peptone had the best synergy with PVCap, whey protein had the best synergy with HIOP-1800, and bovine serum albumin consistently showed synergy with the standard KHIs.
Article
Thermodynamics
Zhi Li, Yue Zhang, Yimao Shen, Liwei Cheng, Bei Liu, Kele Yan, Guangjin Chen, Tianduo Li
Summary: The synergistic mechanism of KHIs and THIs in preventing methane hydrate formation involves three stages, with gas adsorption playing a dominant role. The addition of THIs to solutions containing KHIs enhances methane attraction and weakens the driving force for hydrate formation. It is suggested that the methane adsorption capacity of hybrid inhibitors should be considered in future development.
Article
Chemistry, Physical
Florianne Castillo-Borja, Ulises Bravo-Sanchez
Summary: The study found that TMACl is the best inhibitor for preventing methane hydrate growth, as it reduces the number of hydrogen bonds between water molecules. Aprotic and protic ionic liquids act differently as inhibitors, with protic ionic liquids showing a competitive advantage in forming hydrogen bonds with water molecules.
JOURNAL OF MOLECULAR LIQUIDS
(2021)
Article
Energy & Fuels
Ankur Singh, Ajay Suri
Summary: This study investigates the synergistic effects of three plant-based polysaccharides with four kinetic hydrate inhibitors (KHIs), and experimental results show that the polysaccharides can effectively enhance the hydrate inhibition performance.
Article
Thermodynamics
Jiyue Sun, Lei Jiang, I. Ming Chou, Ngoc N. Nguyen, Anh V. Nguyen, Ying Chen, Juezhi Lin, Chuanjun Wu
Summary: This study investigated the thermodynamics and kinetics of methane hydrate formation in the presence of cetyltrimethylammonium bromide (CTAB) solutions. The cage occupancy and hydration number of the hydrates were determined, showing a range of 3.1-3.6 and 5.9-6.1, respectively. CTAB was found to have no impact on the phase equilibria of methane hydrate, and the kinetic rate constants for different CTAB solutions were also determined. Additionally, large-scale reactor experiments demonstrated the ability of CTAB to promote hydrate formation.
Article
Energy & Fuels
Fulong Ning, Dongdong Guo, Shahab Ud Din, Heen Zhang, Wenjia Ou, Bin Fang, Yongsheng Liang, Ling Zhang, Kyungbook Lee, Carolyn A. Koh
Summary: This study investigates the effects of different types and concentrations of anti-agglomerants/surfactants on the formation kinetics of CH4 hydrate. The results show that anti-agglomerants/surfactants can promote hydrate formation in pure water and high water cut systems, while they slow down or prevent hydrate nucleation and growth in low water cut systems.
Review
Engineering, Chemical
Cornelius B. Bavoh, Omar Nashed, Amirun Nissa Rehman, Nurul Akmal Aqidah Binti Othaman, Bhajan Lal, Khalik M. Sabil
Summary: The study provides a comprehensive overview of the use of ILs as THIs, reviewing available thermodynamic hydrate inhibition data and discussing phase behavior modeling studies. The findings suggest that IL cations, anions, and chain length characteristics play a crucial role in controlling their hydrate inhibition impacts, with potential for enhanced performance by exploring novel IL families with optimized interactions. The research presented in this work is relevant for future breakthroughs in IL-related hydrate inhibition technologies.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2021)
Article
Engineering, Environmental
Chen Chen, Haoyu Yuan, Xiaoming Wang, Na Wang, Yan Lin, Yan He, Fei Wang
Summary: Sulfonated magnetic polymer nanoparticles are proposed as a promoter for methane hydrate formation, showing excellent performance and reliability, making them suitable for application in methane hydrate-based technology.
CHEMICAL ENGINEERING JOURNAL
(2023)
Review
Energy & Fuels
Ankur Singh, Ajay Suri
Summary: This review comprehensively discusses the performance and influencing factors of cyclic-amide-based kinetic hydrate inhibitors, presenting the top ten KHIs with the highest performance in terms of cloud point and induction time. The synergistic effects of guanidinium salts and phosphonium salts on these KHIs are also highlighted.
Article
Environmental Sciences
Sirisha Nallakukkala, Adeel Ur Rehman, Dzulkarnain B. Zaini, Bhajan Lal
Summary: This article reviews the latest advances in heavy metal removal treatment systems for industrial wastewater, with a particular focus on the innovative gas hydrate-based method. The advantages and limitations of conventional physicochemical techniques are also evaluated. The study suggests that gas hydrate-based treatment technology may be the future of water management.
Article
Chemistry, Multidisciplinary
Sirisha Nallakukkala, Hani Abulkhair, Abdulmohsen Alsaiari, Iqbal Ahmad, Eydhah Almatrafi, Omar Bamaga, Bhajan Lal, Azmi Mohd Shariff
Summary: This study analyzed the suitability of methane, carbon dioxide, and propane for hydrate formation, and concluded that CO2-C3H8 is the preferred hydrate former for hydrate-based desalination.
Correction
Chemistry, Multidisciplinary
Sirisha Nallakukkala, Hani Abulkhair, Abdulmohsen Alsaiari, Iqbal Ahmed, Eydhah Almatrafi, Omar Bamaga, Bhajan Lal, Azmi Mohd Shariff
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)
Review
Chemistry, Multidisciplinary
Abdulrab Abdulwahab Almashwali, Cornelius B. Bavoh, Bhajan Lal, Siak Foo Khor, Quah Chong Jin, Dzulkarnain Zaini
Summary: This review article summarizes the prior studies on hydrate formation and mitigation in oil-dominated multiphase systems, providing relevant insights for developing the best solution to manage hydrate formation in oil-dominated systems for the oil and gas industry.
Article
Engineering, Chemical
Amirun Nissa Rehman, Cornelius B. Bavoh, Bhajan Lal, Khalik M. Sabil, Jitendra S. Sangwai
Summary: This study investigates the effects of amino acid solutions on CO2 hydrate formation and dissociation kinetics. The findings show that amino acid solutions can stabilize hydrate dissociation but inhibit CO2 hydrate formation.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2022)
Correction
Chemistry, Multidisciplinary
Abdulrab Abdulwahab Almashwali, Cornelius B. Bavoh, Bhajan Lal, Siak Foo Khor, Quah Chong Jin, Dzulkarnain Zaini
Article
Engineering, Chemical
Omar Nashed, Nur Khairunnisa Talib, Bhajan Lal, Ouahid Ben Ghanem, Dzeti Farhah Mohshim, Khalik M. Sabil, Azmi Mohd Shariff
Summary: This study investigated three types of amino acid-based ionic liquids and found that they exhibit alkaline nature, increase the conductivity of water, and have volumetric properties that change with temperature. An empirical correlation was developed to accurately predict the volumetric properties with R-2 > 0.9762.
ASIA-PACIFIC JOURNAL OF CHEMICAL ENGINEERING
(2023)
Article
Chemistry, Physical
Omar Nashed, Behzad Partoon, Bhajan Lal, Khalik Mohamad Sabil, Sana Yaqub, Azmi Mohd Shariff
Summary: Hydrate-based technology has not been commercially applied due to issues such as formation conditions and slow reaction kinetics. This study investigated the impact of high thermal conductive metallic nanofluids, specifically silver (Ag) and copper (Cu), on the formation of CH4 and CO2 hydrates. The results showed that while Ag and Cu promoted CH4 hydrate formation, they either inhibited or had little influence on CO2 hydrates.
Article
Green & Sustainable Science & Technology
Muhammad Saad Khan, Bhajan Lal, Hani Abulkhair, Iqbal Ahmed, Azmi Mohd Shariff, Eydhah Almatrafi, Abdulmohsen Alsaiari, Omar Bamaga
Summary: This study investigates the use of tryptophan as a biodegradable gas hydrate promotor for desalination. The results show that tryptophan efficiently promotes hydrate formation, reducing induction time and increasing formation rates. Furthermore, increasing the concentration of tryptophan enhances the formation kinetics of CO2 hydrates.
Article
Chemistry, Multidisciplinary
Jai Krishna Sahith Sayani, Niall J. English, Muhammad Saad Khan, Bhajan Lal, Venkateswara Rao Kamireddi
Summary: This study investigates the impact of hydrogen sulfide gas on the phase behavior of methane and carbon dioxide hydrate formation. Simulation using PVTSim software, experimental approach, and literature comparison were utilized to determine the thermodynamic equilibrium conditions. The results indicate that the increase in H2S composition in the gas mixture leads to decreased stability of methane and carbon dioxide hydrates.
Article
Thermodynamics
Ali Qasim, Alamin Idris, Asim Mushtaq, Muhammad Saad Khan, Jai Krishna Sahith Sayani, Aliyu Adebayo Sulaimon, Bhajan Lal, Iqbal Ahmed Moujdin
Summary: This study discusses the effects of hydrogen bonding energy interaction and freezing point depression on five quaternary ammonium salts (QAS) in gas hydrate systems. Methane and carbon dioxide, commonly encountered in flow assurance pipelines, are included in the studied hydrate system. The study reports the thermodynamic influence, average suppression temperature, of the studied system for different mass concentrations and investigates its relationship with the hydrogen bonding energy interaction and freezing point temperature of QAS. The work establishes the relationship between hydrogen bonding energy and average suppression temperature, as well as depression in freezing point with average suppression temperature.
JOURNAL OF CHEMICAL AND ENGINEERING DATA
(2023)
Article
Chemistry, Physical
Khor Siak Foo, Omar Nashed, Bhajan Lal, Cornelius Borecho Bavoh, Azmi Mohd Shariff, Raj Deo Tewari
Summary: This study investigates the effects of nonionic surfactants as kinetic hydrate inhibitors through experimental and modeling studies. The results show that Tween-80 effectively delays the hydrate nucleation time and is more effective than the commercial inhibitor PVP. The developed models can predict the methane hydrate induction time and rate of hydrate formation accurately. These findings are valuable for the safe transportation of hydrocarbons.
COLLOIDS AND INTERFACES
(2022)
Article
Thermodynamics
J. N. Zappey, E. E. Moore, O. Benes, J. -c. Griveau, R. J. M. Konings
Summary: In this study, the heat properties of technetium metal were measured and analyzed using various thermal measurement methods, including its superconductivity, zero-degree Debye temperature, electronic heat capacity coefficient, and the standard entropy of the superconducting state.
JOURNAL OF CHEMICAL THERMODYNAMICS
(2024)
Article
Thermodynamics
Pengshuai Zhang, Jixiu Deng, Xiaoyu Jiang, Liang Xu, Yu Huang, Han Sun, Mi Gao, Xianghan Wang, Yulong Gao, Kangning Fan, Lu Zhang, Shuoye Yang
Summary: In this study, the solubility of daminozide in twelve neat solvents was determined using the gravimetrical method. Various models were employed to analyze the experimental solubility, and the miscibility of daminozide in the selected solvents was discussed based on Hansen solubility parameters. The results showed that the dissolution mechanism of daminozide in all solvents was entropy-driven.
JOURNAL OF CHEMICAL THERMODYNAMICS
(2024)
Article
Thermodynamics
Jinju Ma, Hao Wu, Dongxu Yi, Wei Liu, Xinding Yao, Tao Li, Baozeng Ren
Summary: In this study, the solubility and compatibility of Agomelatine in different solvents were investigated through experimental and simulation methods. The results showed that Agomelatine forms more stable hydrogen bonds with alcohol solvents compared to other ester solvents. Additionally, the study analyzed the acidity and basicity characteristics of Agomelatine as well as the reasons for differences in solubility.
JOURNAL OF CHEMICAL THERMODYNAMICS
(2024)
Article
Thermodynamics
Angelica V. Sharapova, Marina V. Ol'khovich, Svetlana V. Blokhina
Summary: This study determined the key physico-chemical properties of cardiovascular carvedilol (CVD) in terms of solubility and distribution coefficients in modeling solvents and biphasic systems. The results showed that the solubility of CVD varied significantly depending on the solvent and pH conditions, and the dissolution process deviated from ideality in saturated solutions.
JOURNAL OF CHEMICAL THERMODYNAMICS
(2024)
Article
Thermodynamics
Wenxi Song, Na Wang, Mingzhe Tan, Meng Wang, Xin Huang, Ting Wang, Hongxun Hao
Summary: The solubility and thermodynamic behavior of climbazole in different solvents were investigated in this study. The results showed that solubility is influenced by temperature and solvent properties. Furthermore, the solvent effect was evaluated and the molecular mechanism behind the solubility behavior was revealed using solvation energy relationship models and molecular simulation methods.
JOURNAL OF CHEMICAL THERMODYNAMICS
(2024)
Article
Thermodynamics
Yuqi Su, Weijie Jia, Junshuai Chen, Songtao Cao, Maogang He, Ying Zhang
Summary: This paper presents a novel measurement method based on the finite volume method (FVM) for measuring the concentration-dependent mutual diffusion coefficient D(C) in binary solution. The measurement principle was derived by integrating Fick's second law and establishing discretization equation. The method was validated through experiments and a semi-empirical correlation was built to study the temperature and concentration influences on the diffusion coefficient D.
JOURNAL OF CHEMICAL THERMODYNAMICS
(2024)
Article
Thermodynamics
Bo Tang, Xiaoyu Yao, Xueqiang Dong, Bowen Sheng, Yanxing Zhao, Jun Shen, Maoqiong Gong
Summary: In this study, metal-bellows variable volumetry was used to measure the saturated vapor pressures and critical parameters of R1234ze(Z) and R1336mzz(Z). New vapor pressure correlations were formulated based on the obtained data. The low uncertainties of the measured values indicate the reliability and reproducibility of the data. The results provide important thermophysical data for the use and optimization of R1234ze(Z) and R1336mzz(Z) in HTHP systems.
JOURNAL OF CHEMICAL THERMODYNAMICS
(2024)
Article
Thermodynamics
Vivek Pathania, Ankita Garg, Navneet Kaur, Neha
Summary: The interaction between Isoniazid and beta-cyclodextrin in solutions was investigated to understand the molecular interactions between different components. The results showed that the interaction between Isoniazid and beta-cyclodextrin affected the volume and compressibility of the solutions, and the hydration behavior of Isoniazid in the solutions was influenced by the cosolvent.
JOURNAL OF CHEMICAL THERMODYNAMICS
(2024)
Article
Thermodynamics
Mauricio Vega-Teijido, Marc E. Segovia, Martina Kieninger, Oscar N. Ventura
Summary: A composite chemical model, SVECV-f12, has been developed to accurately reproduce barrier heights of hydrocarbon species. The model successfully corrects systematic errors between experimental and theoretical values and is used for predicting formation enthalpies and hydrogenation/isomerization enthalpies.
JOURNAL OF CHEMICAL THERMODYNAMICS
(2024)
Article
Thermodynamics
Kemal Ozcan, Aylin Boztepe, Erdog an Tarcan, Cagatay Tasdemirci
Summary: In this study, the enthalpy of combustion of methane, the main component of natural gas, was measured using a reference gas calorimeter. The experimental results were compared with the values specified in ISO 6976:2016. The average enthalpy of combustion was determined as -55518.2 kJ kg-1 with an error of 0.2%.
JOURNAL OF CHEMICAL THERMODYNAMICS
(2024)
Article
Thermodynamics
Kouki Mekaru, Takuto Miyagi, Ayaka Mishima, Isami Uehara, Ryo Ohmura, Keita Yasuda
Summary: This study investigated the four-phase equilibrium conditions of carbon dioxide + cyclopentane double clathrate hydrate forming systems coexisting with sodium chloride aqueous solution or pure water. The results showed that the double clathrate hydrate is more thermodynamically stable than simple clathrate hydrates under a given sodium chloride concentration.
JOURNAL OF CHEMICAL THERMODYNAMICS
(2024)
Article
Thermodynamics
Yameng Wan, Xiaoqiang Gao, Ruiai Wang, Fanfan Li, Yanxun Li, Haixia He
Summary: This study evaluated the solubility of Iminostilbene (IMB) in twelve organic solvents and found that the solubility increased with temperature and showed a specific order in different solvents. The analysis of molecular interactions and solubility parameters provided insights into the dissolution behavior. The UNIQUAC model was used to fit the solubility data, and the thermodynamic properties of the mixing and dissolution processes were thoroughly evaluated.
JOURNAL OF CHEMICAL THERMODYNAMICS
(2024)
Article
Thermodynamics
Yinan Liu, Mingcheng Li, Chunying Zhu, Xiqun Gao, Youguang Ma
Summary: This study successfully prepared amine-based functionalized deep eutectic solvents and investigated the effects of solvent composition, water content, and temperature on the properties of the solvent through density and viscosity measurements. The results contribute to a better understanding of hydration and intermolecular interactions in deep eutectic solvents.
JOURNAL OF CHEMICAL THERMODYNAMICS
(2024)
Correction
Thermodynamics
Deepak Parmar, Kavitha Kumari, Naveen Kumar, Manju Rani, Mustapha Sahal, Sanjeev Maken
JOURNAL OF CHEMICAL THERMODYNAMICS
(2024)
Article
Thermodynamics
Ruslan N. Nagrimanov, Aliya R. Ibragimova, Boris N. Solomonov
Summary: In this study, the heats of solution of hydrocarbons and alcohols with 2-methyltetrahydrofuran are systematically analyzed. Structure-property relationships are developed to calculate the enthalpy of solvation of aliphatic alcohols in 2-methyltetrahydrofuran. Specific interactions in the alcohol-2-methyltetrahydrofuran systems are determined to better understand intermolecular interactions in 2-methyltetrahydrofuran solutions. This research provides valuable insights into the properties and energies of these interactions, facilitating the transition to more environmentally friendly solvents.
JOURNAL OF CHEMICAL THERMODYNAMICS
(2024)
