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
Engineering, Chemical
Mahnaz Aghajanloo, Mohammad Reza Ehsani, Zahra Taheri, Taraneh Jafari Behbahani, Amir H. Mohammadi, Mahbobeh Mohammad Taheri
Summary: Gas hydrate formation can cause damage to pipelines and equipment, but using hydrate inhibitors can effectively prevent this. This study investigated the effects of low concentrations of inhibitors on the induction time of gas hydrate formation and found that they could prolong the induction time and reduce gas consumption.
CHEMICAL ENGINEERING SCIENCE
(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
Erik G. Dirdal, Malcolm A. Kelland
Summary: The study investigates the enhancement of kinetic hydrate inhibitor's ability to hinder gas hydrate formation by adding solvent synergists. Experimentation under high-pressure conditions was conducted to verify the process.
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
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
Chemistry, Physical
T. A. Gillam, C. K. Goh, N. Ninan, K. Bilimoria, H. S. Shirazi, S. Saboohi, S. Al-Bataineh, J. Whittle, A. Blencowe
Summary: The study presents the innovative use of plasma polymerization to convert povidone-iodine into nanoscale coatings for medical devices and wound dressings. These coatings provide sustained release of iodine over a period of 24 hours, showing high antimicrobial activity against clinically relevant microbes responsible for wound infections. This novel approach offers broad-spectrum antiseptic coatings for various biomedical applications.
APPLIED SURFACE SCIENCE
(2021)
Article
Materials Science, Characterization & Testing
Chul Min Yang, Kiramage Chathuranga, Jong Soo Lee, Won Ho Park
Summary: This study investigated the effect of polyphenolic additives on the thermal decomposition of polymers and compared the influence of different numbers of phenolic hydroxyl groups on the properties of the composite films.
Article
Chemistry, Physical
Jinxiang Liu, Yujie Yan, Gang Chen, Jun Zhang, Shengli Liu
Summary: In this study, the inhibition performance of poly(N-alkyl-N-vinyl acetamide)s with varying alkyl side chain lengths as kinetic hydrate inhibitors was investigated through calculations and simulations. Results show that increasing the alkyl side chain length enhances adsorption strength and chemical reactivity, improving inhibition performance.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2022)
Article
Energy & Fuels
Radhakanta Ghosh, Janronel Pomicpic, Malcolm A. Kelland
Summary: Kinetic hydrate inhibitors (KHIs) are used to prevent gas hydrates deposition and their performance is limited by subcooling and other factors. Poly(N-isopropyl methacrylamide) (PNIPMAm) blended with triisopentylamine oxide (TiPeAO) showed exceptional KHI performance. The performance decreased at higher concentrations, possibly due to polymer and amine oxide aggregation. Overdosing of components can have detrimental effects on KHI performance.
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
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
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
Chemistry, Applied
Marica Bianchi, Alessandro Pegoretti, Giulia Fredi
Summary: Drug personalization has gained attention due to the limitations of standard generalized drug treatments. Three-dimensional printing, particularly fused deposition modeling (FDM), offers the possibility to tailor drug delivery devices for specific patient needs. This review focuses on the applications of FDM in drug fabrication using poly(vinyl alcohol) (PVA) and poly(vinyl pyrrolidone) (PVP) as drug-loaded matrices, emphasizing the effect of printing parameters, tablet shape, and drug distribution and concentration on personalized drug release.
JOURNAL OF VINYL & ADDITIVE TECHNOLOGY
(2023)
Article
Thermodynamics
Xiao-Dong Shen, Zhen Long, Ling-li Shi, De-Qing Liang
JOURNAL OF CHEMICAL AND ENGINEERING DATA
(2015)
Article
Energy & Fuels
Qian Zhang, Xiaodong Shen, Xuebing Zhou, Deqing Liang
Article
Chemistry, Physical
Xiao-Dong Shen, Ling-Li Shi, Zhen Long, Xue-Bing Zhou, De-Qing Liang
JOURNAL OF MOLECULAR LIQUIDS
(2016)
Article
Energy & Fuels
Lingli Shi, Xiaodong Shen, Jiaxiang Ding, Deqing Liang
Article
Energy & Fuels
Xiao-dong Shen, Guo-dong Hou, Jia-xiang Ding, Xue-bing Zhou, Cui-ping Tang, Yong He, Jing-sheng Lu, De-qing Liang
JOURNAL OF NATURAL GAS SCIENCE AND ENGINEERING
(2018)
Article
Energy & Fuels
Xiao-dong Shen, Xue-bing Zhou, De-qing Liang
Article
Energy & Fuels
Xiao-dong Shen, De-qing Liang, Nobuo Maeda
Article
Energy & Fuels
Nobuo Maeda, Xiao-dong Shen
Article
Energy & Fuels
Xiao-dong Shen, Yin-de Zhang, Zi-yue Shao, Nobuo Maeda
Summary: The study found that CMC-Na and PVP have different inhibition effects on the formation of CO2 hydrate, with the inhibition effects of CMC-Na decreasing with concentration and PVP slowing down the growth rate of CO2 hydrate. Under stirring conditions, CO2 hydrate grows faster.
Article
Chemistry, Multidisciplinary
Xiaodong Shen, Yang Li, Yanxia Li, Long Shen, Nobuo Maeda, Yinde Zhang, Heng Wang, Xiaoguang Wang
Summary: The study found that l-tryptophan has a promoting effect on the formation kinetics and macroscopic morphology of methane hydrates. Even at a stirring rate of 200 rpm, the promotion effect of l-tryptophan remains almost unchanged with increasing concentration. At a concentration of 0.1 wt%, the ultimate gas consumption increased by 46.52% and t (90) decreased by 33.67%. The ultimate gas consumption and t (90) increased when the temperature was raised from 273.65 K to 277.15 K. When the concentration of l-tryptophan was greater than 0.5 wt%, hydrates cropped out from several sites of the hydrate film and continued to grow upward.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2023)