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
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.
Article
Energy & Fuels
Ankur Singh, Ajay Suri, Divyansh Chandravanshi
Summary: To ensure the smooth operation of the oil and gas industry, it is crucial to prevent hydrate blockages in pipelines. Synthetic kinetic hydrate inhibitors (KHIs) are commonly used, but they pose disposal concerns due to poor biodegradability. This study investigates the use of a natural and biodegradable polysaccharide, lambda carrageenan, as a standalone KHI and in combination with biodegradable solvents and commercial KHI polymers. The results show that lambda carrageenan exhibits hydrate inhibition performance comparable to commercial KHIs when used alone or in combination with solvents or polymers.
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
Engineering, Environmental
Yanzhen Liu, Yang Zhao, Yuxin Jia, Lunxiang Zhang, Lei Yang, Jiafei Zhao
Summary: Fine clay particles from a hydrate rich area in the South China Sea were found to adsorb kinetic hydrate inhibitors, leading to a weakened inhibition effect. Future dosage adjustments in marine environments should carefully consider the effects of clay-rich conditions.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Energy & Fuels
Yue Zhang, Zhi Li, Xiaodeng Yang, Tianduo Li
Summary: In recent years, the study of natural polymer products, such as methane hydrate inhibitors, has gained increasing attention in scientific research. This study successfully synthesized four chitosan derivatives and compared their methane hydrate inhibition effects with chitosan (CS) and carboxymethyl chitosan (CMCS). It was found that chitosan with high hydrophobicity effectively prevented the formation of methane hydrates, while the inhibition effect of CMCS could be improved by introducing specific chemical groups. This work provides inspiration for the further development of efficient and environmentally friendly kinetic hydrate inhibitors.
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)
Review
Engineering, Environmental
Ngoc N. Nguyen, Anh V. Nguyen
Summary: Gas hydrates present both opportunities and threats, and chemical additives are used to promote or inhibit hydrate formation. However, recent studies have shown that some known hydrate promoters can act as inhibitors, and vice versa, when their concentrations change. The dual nature of hydrate additives has not been thoroughly discussed in the literature.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Energy & Fuels
Amir Saberi, Abdolmohammad Alamdari, Ali Rasoolzadeh, Amir H. Mohammadi
Summary: This study investigated the impact of three chemicals at different concentrations on gas hydrate formation, and identified the optimal choices. Furthermore, the combination of PVP and MEG in an aqueous solution was found to have a simultaneous synergistic impact on both natural gas hydrate formation induction time and the rate of gas consumption.
Article
Energy & Fuels
Caifeng Yang, Mucong Zi, Guozhong Wu, Xue Zou, Kai Liu, Daoyi Chen
Summary: This study evaluated the influence of kinetic hydrate inhibitor (KHI) on methane - propane hydrate formation kinetics under different subcooling and concentration conditions. It proposed a "concentration effect" concept that highlighted the nonmonotonic relationship between KHI performance and concentration. Two hypotheses were proposed to explain this phenomenon, and the results showed that the concentration effect became less obvious under certain experimental conditions.
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
Polymer Science
Jianlong Wang, Jinsheng Sun, Hang Bian, Qibing Wang, Zhenbo Feng, Cheng Lu, Han Ren, Rongchao Cheng, Jintang Wang, Ren Wang
Summary: Natural gels have attracted global research attention for their greenness, environmental-friendliness, and good hydrate inhibition performance. This study evaluated the inhibition performance of xanthan gum and pectin on hydrate nucleation and growth in sediment environments and revealed the internal inhibition mechanisms. The study also investigated the effects of natural gels on sediment dispersion stability and low-temperature fluid rheology.
Article
Engineering, Environmental
Mucong Zi, Guozhong Wu, Jiang Wang, Daoyi Chen
Summary: This study systematically investigated the influence of light oil components and asphaltene on gas hydrate formation through experiments, as well as evaluated the performance of commercial kinetic hydrate inhibitors (KHIs) in different oil-water systems. The results showed that light oil can promote initial hydrate growth, while asphaltene, especially with light oil solvent, has an inhibition effect on gas hydrate formation.
CHEMICAL ENGINEERING JOURNAL
(2021)
Review
Energy & Fuels
Prajwal D. Jadhav, Pratham M. Shah, Debashis Kundu
Summary: Gas hydrate naturally forms in subsea beds and transportation pipelines with favorable conditions, while ionic liquids (IL) have emerged as novel inhibitors for gas hydrate formation and dissociation. This review focuses on thermodynamic and kinetic modeling of the gas hydrate/IL system, discussing inhibition aspects and the role of ILs. Future areas for modeling gas hydrate/IL systems and potential improvements are also highlighted.
Article
Chemistry, Physical
Amir Erfani, Farshad Varaminian
JOURNAL OF MOLECULAR LIQUIDS
(2017)
Article
Energy & Fuels
Amir Erfani, Elham Fallah-Jokandan, Farshad Varaminian
JOURNAL OF NATURAL GAS SCIENCE AND ENGINEERING
(2017)
Article
Thermodynamics
Amir Erfani, Shahin Khosharay, Clint P. Aichele
JOURNAL OF CHEMICAL THERMODYNAMICS
(2019)
Article
Chemistry, Physical
Amir Erfani, Nicholas H. Flynn, Joshua D. Ramsey, Clint P. Aichele
JOURNAL OF MOLECULAR LIQUIDS
(2019)
Review
Biochemistry & Molecular Biology
Amir Erfani, Joshua Seaberg, Clint Philip Aichele, Joshua D. Ramsey
Article
Polymer Science
Amir Erfani, Nicholas H. Flynn, Clint P. Aichele, Joshua D. Ramsey
JOURNAL OF APPLIED POLYMER SCIENCE
(2020)
Article
Chemistry, Multidisciplinary
Amir Erfani, Kosma Szutkowski, Clint P. Aichele, Jeffery L. White
Summary: Investigations on diffusion behavior of water/cyclohexane mixtures confined in solid nanoporous glass hosts reveal unexpected anomalous diffusion influenced by loading and composition, which cannot be extrapolated from pure-component liquids in confinement.
Article
Polymer Science
Amir Erfani, Payam Zarrintaj, Joshua Seaberg, Joshua D. Ramsey, Clint P. Aichele
Summary: Zwitterionic materials can increase protein stability by preventing nonspecific interactions, as demonstrated in a study where a microgel loaded with enzyme showed excellent reusability and increased enzymatic stability. The immobilized enzyme exhibited higher activity at pH 8.5, with a significant increase in temperature at which it loses activity compared to the free enzyme.
JOURNAL OF APPLIED POLYMER SCIENCE
(2021)
Article
Engineering, Biomedical
Amir Erfani, Jeremy M. Schieferstein, Paul Reichert, Chakravarthy N. Narasimhan, Cinthia Pastuskovas, Vaishali Parab, Denarra Simmons, Xiaoyu Yang, Apoorv Shanker, Paula Hammond, Patrick S. Doyle
Summary: This work presents a platform technology that combines the stability of crystalline antibodies with injectability and tunability of soft hydrogel particles for subcutaneous administration of monoclonal antibodies (mAbs). The composite alginate hydrogel particles, generated via a gentle centrifugal encapsulation process, achieve stable, high concentration, and injectable formulations of the mAbs. The study also evaluates the biocompatibility and pharmacokinetics of the crystalline antibody-laden alginate hydrogel particles in animal models.
ADVANCED HEALTHCARE MATERIALS
(2023)
Article
Chemistry, Physical
Amir Erfani, Abanoub Hanna, Payam Zarrintaj, Saeed Manouchehri, Katie Weigandt, Clint P. Aichele, Joshua D. Ramsey
Summary: This study successfully synthesized a biodegradable zwitterionic poly(carboxybetaine) microgel for encapsulating and releasing antibodies, demonstrating good cell compatibility. The released antibodies from the microgel were highly active, suitable for localized antibody delivery with minimized non-specific interactions.
Meeting Abstract
Chemistry, Multidisciplinary
Amir Erfani, Nathan Pickering, Jeffery White, Joshua Ramsey, Clint Aichele
ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY
(2019)
Meeting Abstract
Chemistry, Multidisciplinary
Amir Erfani, Nathan Pickering, Clint Aichele, Jeffery White
ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY
(2019)
Meeting Abstract
Chemistry, Multidisciplinary
Amir Erfani, Nicholas Flynn, Clint Aichele, Joshua Ramsey
ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY
(2019)
Meeting Abstract
Chemistry, Multidisciplinary
Elham Fazelpour, Christopher Fennell, Amir Erfani, Clint Aichele
ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY
(2019)
Meeting Abstract
Chemistry, Multidisciplinary
Amir Erfani, Nicholas Flyn, Josh Ramsey, Clint Aichele
ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY
(2018)
