Article
Engineering, Chemical
Yanping Duan, Pengfei Wang, Wenge Yang, Xia Zhao, Hong Hao, Ruijie Wu, Jie Huang
Summary: This study prepared a new kinetic hydrate inhibitor P(VCap-BMA) and found that it exhibited synergistic inhibitory effects when compounded with low doses of methanol or ethylene glycol. Additionally, the P(VCap-BMA) - methanol system showed better inhibitory effects compared to the PVCap - methanol system. These findings provide valuable insights for the research and application of novel hydrate inhibitors.
CHINESE JOURNAL OF CHEMICAL ENGINEERING
(2021)
Article
Energy & Fuels
Guilherme Muhlstedt, Jonathan Felipe Galdino, Diogo E. Andrade, Cezar O. R. Negrao
Summary: Gas hydrates may form in deep-water drilling operations when light compounds flow into the wellbore due to a kick. By inducing hydrate formation with tetrahydrofuran in water-based drilling fluid, researchers found that the resulting hydrate slurry is a time-dependent elastoviscoplastic material with irreversible microstructural changes under shear. The study also revealed that the hydrate slurry exhibits different rheological properties depending on whether it is formed statically or dynamically.
Article
Engineering, Chemical
Qian Zhang, Malcolm A. Kelland, Evan M. Lewoczko, Caleb A. Bohannon, Bin Zhao
Summary: The use of zwitterionic polymers as kinetic hydrate inhibitors (KHIs) in gas and oil industry has shown promising results, with the key performance parameter being the length of the alkyl chain on the monomer unit side chains. Copolymers of the zwitterionic monomers and NIPMAM exhibit better increase in KHI performance with increasing concentration, suggesting the importance of strong hydrogen-bonding groups for high KHI performance.
CHEMICAL ENGINEERING SCIENCE
(2021)
Article
Chemistry, Applied
Muhammad Atif, Kang He, Muhammad Irfan, Yuchen Wang, Fei Hu, Lijuan Chen, Yanmei Wang
Summary: A smart thin stimuli responsive coating based on copolymers was developed to control protein adsorption properties by investigating the effects of pH, ionic strength, and chain length. The experimental observations showed that the coating exhibited switchable ability in response to changes in environmental conditions, and could efficiently adsorb and desorb proteins at different conditions.
PROGRESS IN ORGANIC COATINGS
(2021)
Article
Thermodynamics
Daniela F. S. Freitas, Gabriela C. Mattos, Luis C. Mendes
Summary: Biodegradable ternary systems based on poly(vinyl alcohol)/poly(N-vinyl-2-pyrrolidone)/octadecylamine-containing zirconium phosphate were studied. The synthesis and intercalation of lamellar zirconium phosphate were accomplished. The interaction between PVA and ZrPOct was prominent, and the addition of octadecylamine altered the polymer-polymer interaction acting as a compatibilizing agent. This study provides a potential approach for controlled drug delivery.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2022)
Article
Chemistry, Multidisciplinary
Malcolm A. A. Kelland, Erik G. G. Dirdal, Radhakanta Ghosh, Hiroharu Ajiro
Summary: Kinetic hydrate inhibitors (KHIs) are being studied to prevent the formation of gas hydrates and blockage in oil and gas production flow lines. Recent research has shown that polymers made from the commercially available monomer VMOX perform better than some existing KHI polymers. This study explored the use of low molecular weight PVMOX homopolymers, VMOX copolymers, and blends with nonpolymeric synergists to improve the performance of KHIs.
Article
Engineering, Environmental
Youngki Lee, Hyeonjin Kim, Wonhyeong Lee, Dong Woo Kang, Jae W. Lee, Yun-Ho Ahn
Summary: This review explores the potential of clathrate hydrates as a technology for CO2 capture and separation, showcasing methods to improve CO2 hydrate formation and separate CO2 from gas mixtures. It also delves into additional applications such as cold energy storage and the advantages of the CH4-CO2 replacement method.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Thermodynamics
Saeid Sinehbaghizadeh, Agus Saptoro, Sepideh Amjad-Iranagh, Amir H. Mohammadi
Summary: This study investigates the influence of different biogas compositions on clathrate hydrate formation and proposes a kinetic model for predicting the progress of biogas crystal growth. The results indicate that the concentration of dissolved gas in liquid water is a key factor in the growth rate, with H2S and SO2 molecules slightly promoting biogas hydrate formation and N2 and H2 molecules reducing the generation rate of biogas hydrate.
Article
Chemistry, Multidisciplinary
Yong Wang, Xiaorong Lan, Shuyin Zuo, Yafeng Zou, Sai Li, Zhonglan Tang, Yunbing Wang
Summary: A star-shaped PLLA oligomer with photoreactive groups at the terminal was synthesized, and a photopolymerizable resin was prepared by incorporating NVP and FAME. The resulting network showed high mechanical properties in the dry state and good flexibility in the wet state, with both cytocompatibility and anti-adhesion properties. The material holds potential for applications in anti-adhesion barrier materials and biological anti-fouling materials with customization requirements, enabled by Digital Light Processing (DLP) technology.
Article
Thermodynamics
Zhen Long, Xuebing Zhou, Zhilin Lu, Deqing Liang
Summary: In this study, a series of copolymers of NVCap with NIPAM were synthesized and their inhibition performance on CH4 hydrate formation was investigated. The results showed that these copolymers were more effective in inhibiting the formation and growth of hydrates compared to NVCap homopolymer under the same conditions. The copolymers with the lowest molecular weight exhibited the best inhibition performance. Raman data revealed that the copolymers preferred to hinder CH4 molecules from entering large hydrate cages.
Review
Engineering, Chemical
Nkululeko Nkosi, Diakanua Nkazi, Kaniki Tumba
Summary: This article reviews the emerging and innovative gas hydrate-based fruit juice concentration technology, highlighting its advantages of preserving bioactive compounds and conserving energy. Carbon dioxide is found to be the preferred hydrate former for juice concentration. However, further research is needed to confirm the sustainability of this novel process.
JOURNAL OF FOOD ENGINEERING
(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
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
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
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.
