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)
Article
Multidisciplinary Sciences
Arul Bharathi, Omar Nashed, Bhajan Lal, Khor Siak Foo
Summary: This study investigated the thermodynamic inhibition effects of the mixture of monoethlyene glycol and glycine on the carbon dioxide hydrate phase boundary condition through experiments and modeling. The results showed that the 15 wt.% mixture of MEG and Gly exhibited the highest inhibition effect, while the synergistic effect was higher at 10 wt.%. The modified Dickens model successfully predicted the phase equilibrium data of CO2 hydrates with a maximum error of +/- 0.52 K.
SCIENTIFIC REPORTS
(2021)
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
Biochemistry & Molecular Biology
Sharon Monaci, Daniela Minudri, Lorenzo Guazzelli, Andrea Mezzetta, David Mecerreyes, Maria Forsyth, Anthony Somers
Summary: Corrosion is a major problem that affects structures and buildings, leading to premature failure and economic loss. Biobased lignin and ionic liquids have shown potential as corrosion inhibitors. This study investigated the inhibitory properties of new biobased lignin ionic liquids and found that one of them exhibited promising performance.
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
Ali Rasoolzadeh, Ali Bakhtyari, Mohammad Reza Sedghamiz, Jafar Javanmardi, Khashayar Nasrifar, Amir H. Mohammadi
Summary: A rigorous predictive model for calculating water activity in the presence of ionic liquids (ILs) is proposed and applied in the prediction of gas hydrate stability conditions. The model accounts for both short-range interactions and long-range electrostatic interactions and has been validated with data, demonstrating its superiority.
JOURNAL OF MOLECULAR LIQUIDS
(2022)
Article
Chemistry, Analytical
Simon Doblinger, Catherine E. Hay, Liliana C. Tome, David Mecerreyes, Debbie S. Silvester
Summary: This research investigates the use of mixed membranes composed of conductive poly(IL)s and ionic liquids in amperometric gas sensors. The study finds that the membranes exhibit high robustness and non-flowing properties, while also showing excellent and reproducible analytical responses towards gases. The results demonstrate the potential of these membranes as designer gas sensor materials for robust sensor devices.
ANALYTICA CHIMICA ACTA
(2022)
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
Energy & Fuels
Ali Rasoolzadeh, Ali Bakhtyari, Khayyam Mehrabi, Jafar Javanmardi, Khashayar Nasrifar, Amir H. Mohammadi
Summary: This study presents a new method for calculating water activity in gas hydrate systems using the van der Waals-Platteeuw model. The model incorporates both short-range and long-range interactions and has been tested against a comprehensive database, showing excellent performance. It is capable of accurately predicting gas hydrate dissociation temperatures in complex systems.
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
Energy & Fuels
Lanyun Wang, Yuan Yang, Yan Wang, Yongliang Xu, Yao Li, Jianping Wei, Xiaodong Feng, Kun Zhang
Summary: The slow formation rate and low storage capacity of gas hydrates, as well as the harsh conditions and contaminating promoters, pose major challenges to the application of carbon capture and storage (CCS) technology based on hydrate formation. In this study, three types of graphene nanoparticles (nonfunctionalized graphene, graphene oxide, and amino graphene) were tested as additives to accelerate CO2 and CH4 hydrate formation. The results showed that nonfunctionalized graphene promoted the thermodynamics of CO2 hydrate formation, while graphene oxide and amino graphene had no effect or even inhibited the formation. However, graphene oxide and amino graphene effectively enhanced gas consumption. Overall, nonfunctionalized graphene shortened the induction time, while graphene oxide and amino graphene showed potential as additives to improve gas consumption. The presence of oxidized and amine groups was found to inhibit gas hydrate nucleation.
Article
Chemistry, Physical
Chandrakant Mukesh, Shokat Sarmad, Ajaikumar Samikannu, Dariush Nikjoo, William Siljebo, Jyri-Pekka Mikkola
Summary: In this study, porous ionic liquids (ILs) utilizing microporous ZIF-8 moieties and functional ILs were prepared and thoroughly characterized. The prepared porous ILs exhibited low viscosity, high thermal stability, and reusability, and showed enhanced CO2 sorption capacity compared to neat ILs.
JOURNAL OF MOLECULAR LIQUIDS
(2022)
Article
Chemistry, Multidisciplinary
Jocasta Avila, Chiara Corsini, Cintia M. Correa, Martin Rosenthal, Agilio Padua, Margarida Costa Gomes
Summary: This Perspective highlights the pathways to prepare porous ionic liquids using easily accessible materials for reduced environmental impact. The study demonstrates that suspensions of porous solids are stable in eutectic mixtures, which indicates their potential in preparing porous ionic liquids. Porous ionic liquids maintain the wide electrochemical window observed in their precursor pure ionic liquids, making them suitable for green electrochemical reactions, especially those involving gases with enhanced solubility in the porous suspensions. Furthermore, their capacity as gas-rich media suggests potential sustainable biomedical and pharmaceutical applications, provided that non-toxic, biocompatible ionic liquids and porous solids are utilized.
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, 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
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)