Article
Engineering, Marine
Zhiguang Song, Shiyuan Cui, Cuiping Tang, Yong Chen, Deqing Liang, Sibo Wang
Summary: In this work, a modified PVCap-NH2-COOH was synthesized and evaluated as a kinetic inhibitor for methane hydrate formation. The performance of PVCap-NH2-COOH was found to be better than PVCap at the same concentrations. It had a selective action on the crystal surface of hydrates and could prevent methane molecules from entering large cages.
JOURNAL OF MARINE SCIENCE AND ENGINEERING
(2023)
Article
Engineering, Environmental
Changrui Shi, Huiquan Liu, Lunxiang Zhang, Mingjun Yang, Yongchen Song, Jiafei Zhao, Zheng Ling
Summary: Sluggish formation kinetics is a challenge for the practical application of gas hydrate-based technologies. Carbon monoliths with controlled surface functional groups enhance the nucleating ability of methane hydrates. Carbonyl oxygen is identified as the most effective functional group in reducing induction time and enhancing formation kinetics. The turned hydrogen bonds near the CBCM surface contribute to the enhanced formation kinetics. Optimized carbonyl oxygen in CBCM significantly improves methane hydrate formation kinetics and storage capacity with outstanding cycle stability.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Energy & Fuels
Marshall Pickarts, Sriram Ravichandran, Jose Delgado-Linares, Erika Brown, Vinod Veedu, Carolyn A. Koh
Summary: This study aims to investigate the implications of transient conditions on gas hydrate formation mechanisms and explore a possible mitigation strategy of a surface treatment. It was found that an omniphobic surface treatment affects initial gas hydrate deposition and its wall adherence strength, as well as the overall plugging outcome. This research is important for a better understanding of phase separated gas hydrate systems and passive deposition mitigation strategies.
Article
Chemistry, Physical
Shurraya Denning, Ahmad A. A. Majid, James M. Crawford, Moises A. Carreon, Carolyn A. Koh
Summary: This study shows that zeolites SSZ-13 and SAPO-34 can significantly increase water-to-hydrate conversion rates, with SSZ-13 outperforming SAPO-34 in promoting hydrate growth. The high surface area of zeolites enlarges the gas-to-water contact area, facilitating hydrate formation.
ACS APPLIED ENERGY MATERIALS
(2021)
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
Lifang Song, Chengwen Wang, Zehua Chen, Kaihe Lv, Zhiyuan Wang
Summary: In the drilling process for deepwater and hydrate formations, adding salty components to drilling fluids can effectively inhibit hydrate formation. This study designed an evaluation device to assess the effect of drilling fluid additives on hydrate formation and phase equilibrium. Experiments were conducted on pure water and three commonly used salty additives, establishing hydrate phase equilibrium equations under different conditions. The results showed that sodium chloride and potassium formate solutions can effectively inhibit hydrate formation, and the concentration of potassium formate affects the phase equilibrium pressure at different temperatures. The incomplete presence of sodium silicate in water promotes methane hydrate formation. The study provides a theoretical basis for deepwater drilling fluid systems and multicomponent annular flow research.
Article
Energy & Fuels
Shamil E. Gainullin, Abdolreza Farhadian, Polina Y. Kazakova, Matvei E. Semenov, Yulia F. Chirkova, Atousa Heydari, Roman S. Pavelyev, Mikhail A. Varfolomeev
Summary: Novel amino acid derivatives (ACDs) were developed as efficient promoters for methane hydrate formation and recovery, exhibiting superior kinetics compared to anionic surfactants without foaming. ACD5 achieved the highest promotion effect in distilled water, increasing the water-to-hydrate conversion from 39.6% to 94.3%, exceeding sodium dodecyl sulfate (SDS). ACDs also showed higher promotion activity than SDS in salt water, making seawater a cost-effective alternative for methane hydrate production.
Review
Polymer Science
Alsu Venerovna Fakhreeva, Vasily Viktorovich Nosov, Alexander Iosifovich Voloshin, Vladimir Anatolyevich Dokichev
Summary: This review discusses the types and applications of chemical inhibitors of gas hydrate formation in the oil and gas industry. It analyzes the development of new types of environmentally safe green kinetic hydrate inhibitors (KHIs) based on biopolymers. The article considers the structure, physicochemical properties, efficiency, and commercial prospects of polysaccharides in preventing and controlling gas hydrate formation. It also presents recent research on cost-effective, efficient, and biodegradable KHIs for industrial applications in the oil and gas industry.
Article
Materials Science, Multidisciplinary
Barbara Louise Lemos Drumond Silva, Isabella Leite Ferraz, Denis Fernandes do Nascimento, Jose Adilson de Castro, Leticia Vitorazi
Summary: This study investigates the novelty of using alginate as a natural gas hydrate inhibitor, finding that lower concentrations and acidic pH environment are beneficial for its inhibitory effect. The JMAK model is suitable for describing the crystallization kinetics of the studied systems, with alginate showing good inhibitory capacity.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2021)
Review
Engineering, Marine
Bo Li, You-Yun Lu, Yuan-Le Li
Summary: Natural gas is a low-carbon energy source that is abundant and has high calorific value. Solidified natural gas technology efficiently stores and transports natural gas in an environmentally-friendly way. Amino acids, as additives, have the potential to promote the growth speed of gas hydrates and are more friendly to the environment.
JOURNAL OF MARINE SCIENCE AND ENGINEERING
(2022)
Article
Thermodynamics
Mengru Tian, Yongchen Song, Jia-nan Zheng, Guangjun Gong, Mingjun Yang
Summary: This study simulated methane hydrate sediment with a temperature gradient and found that the temperature gradient affects the formation and dissociation of hydrates. The results of this study are significant for improving the efficiency of methane hydrate exploitation.
Article
Energy & Fuels
Yu Zhang, Lei Zhang, Chuan-Yu Zhu, Li-Xin Xu, Xiao-Sen Li, Zhao-Yang Chen
Summary: The formation rates of methane hydrate are significantly affected by the grain size of the sediments, with lower rates observed in sand compared to powders. The final water conversion rate is similar in powders and can reach nearly 100% with sufficient gas supply, while the rate declines sharply at a certain water conversion point in all three types of porous media.
Article
Energy & Fuels
Yingmei Wang, Aili Niu, Wenze Jiao, Ji Chen, Peng Zhang, Jinping Li
Summary: Carbon dioxide hydrate formation rate is improved by using different accelerator systems. The combination of nanographite-TBAB and SDS-TBAB shows better performance in reducing the nucleation time. TBAB shows the best nucleation amount, formation rate, and conversion rate among the single acceleration systems.
Article
Energy & Fuels
Kan Jeenmuang, Chakorn Viriyakul, Katipot Inkong, Hari Prakash Veluswamy, Santi Kulprathipanja, Pramoch Rangsunvigit, Praveen Linga
Summary: Amino acids play an important role in promoting methane hydrate formation with THF, increasing formation rate and altering formation morphology, without affecting the dissociation process.
Article
Engineering, Environmental
Chun-Gang Xu, Wei Zhang, Hao-Yang Li, Chang-Wen Xiao, Xiao-Sen Li
Summary: This study combines macro experimental investigation, simulation calculation, and microscopic analysis to study the process of hydrate formation and the effects of gas molecules on hydrate nucleation. The results propose a more efficient hydrate formation method and provide directions for solving the key bottleneck of hydrate technology.
CHEMICAL ENGINEERING JOURNAL
(2022)