4.6 Article

Experimental study on the intrinsic dissociation rate of methane hydrate

Related references

Note: Only part of the references are listed.
Article Energy & Fuels

Effect of residual guest concentration in aqueous solution on hydrate reformation kinetics

Xiao-Hui Wang et al.

Summary: This study investigated the influence of dissolved gas concentration on gas hydrate formation and established an equivalent driving force model and a predictive model for induction time. The experimental results showed that maintaining a certain pressure can accelerate hydrate formation, and different residual gas concentrations in the solution can affect the induction time. Additionally, a heat treatment under the same pressure conditions resulted in an increase in the induction time of subsequent hydrate reformation, indicating the presence of residual water structures in the solution, known as the memory effect.
Article Engineering, Chemical

Effect of surface roughness on methane hydrate formation and its implications in nucleation design

Mengyang Li et al.

Summary: As a new form of energy with substantial potential, natural gas hydrate will play a crucial strategic role in the future due to its vast reserves and broad industrial application prospects. To better comprehend the nucleation and growth mechanism of clathrate hydrate, an enhanced thermodynamic model was proposed based on the wall roughness model and nucleation theory. Our research reveals a fundamental method for designing or manipulating the heterogeneous nucleation of hydrates, thereby foreseeing promising applications in hydrate-related technologies based on the fractal structure of the substrate's surface.

AICHE JOURNAL (2023)

Article Engineering, Chemical

Mechanisms of hydrate blockage in oil-water dispersions based on flow loop experiments

Vinicius De Almeida et al.

Summary: In this work, the mechanisms of hydrate formation and plugging in oil-water systems are proposed based on flow loop tests. Experiments were conducted at different water cuts using Kerdane oil, water (with NaCl) and natural gas. Different instruments were used to identify flow patterns and detect the phase carrying hydrates. A model based on density measurement is proposed to calculate the fraction of hydrates flowing locally, and local accumulations of hydrates were observed leading to plugging.

CHEMICAL ENGINEERING SCIENCE (2023)

Article Thermodynamics

Heat utilization efficiency analysis of gas production from hydrate reservoir by depressurization in conjunction with heat stimulation

Tianwei Wu et al.

Summary: The heat transfer process of hydrate decomposition in the PHS was investigated, and the real-time decomposition rate and the energy utilization efficiency were quantitatively studied. The results showed that the energy consumption mainly came from the sensible heat hydrate bearing sediments and the heat transfer from the environment. A heat transfer coefficient was proposed to quantify the heat transfer through the boundary, which presented large fluctuations during the initial stage of depressurization and stable behavior during the later stage of heat injection.

ENERGY (2023)

Article Engineering, Chemical

Upscaling methane hydrate dissociation kinetic model during depressurisation

Junyu Yang et al.

Summary: This study conducts a pore-scale numerical simulation to analyze the impact of heat and mass transfer on the dissociation rate of methane hydrate by depressurization, in order to scale up the kinetic model at the representative element volume (REV) scale. The mass transport limitation indicates that hydrate dissociation tends to occur near the gas phase. The effective reaction surface area is introduced to measure the exposed hydrate surface to the gas phase and modeled as a function of local hydrate and water saturation and hydrate pore habits. Heat transport limitation is calculated using the one-temperature model due to local thermal equilibrium. Compared to the pore-scale simulation, the proposed REV-scale kinetic model predicts dissociation rates with a relative error of less than 10%, which is expected to increase the precision of hydrate recovery forecast.

CHEMICAL ENGINEERING SCIENCE (2023)

Article Energy & Fuels

CO2 concentration in aqueous solution from gas-liquid equilibrium system to gas-liquid-hydrate coexistence system

Xiao-Hui Wang et al.

Summary: By conducting a series of experiments, this study measured the saturated CO2 concentration in aqueous solution from gas-liquid (V-Lw) two-phase equilibrium system to gas-liquid-hydrate (V-Lw-H) three-phase equilibrium system up to hydrate stability region. It achieved CO2 solubility curves in a wider temperature and pressure range. The CO2 solubility in liquid phase would increase with decreasing temperature and reach the maximum at the three-phase equilibrium temperature. It would then decrease with further temperature decrease in the hydrate stability region. The CO2 solubility would increase with increasing pressure up to the three-phase equilibrium pressure, and then remain constant in the hydrate stability region.

GAS SCIENCE AND ENGINEERING (2023)

Article Energy & Fuels

Memory effect of gas hydrate: Influencing factors of hydrate reformation and dissociation behaviors

Xuan Kou et al.

Summary: The memory effect of gas hydrate can shorten the induction time of hydrate nucleation, reduce the formation rate, and influence the dissociation behavior by improving the homogeneous distribution of gas hydrate in pores.

APPLIED ENERGY (2022)

Article Engineering, Chemical

Experimental observation of formation and dissociation of methane hydrate in a micromodel

Xingxun Li et al.

Summary: Understanding the mechanisms of hydrate formation and dissociation through microfluidic visualization in a porous micromodel is essential for natural gas hydrate exploration. Different methane hydrate formations and dissociation behaviors were observed, with significant differences between methane-pure water and methane-brine systems. The study also highlighted the impact of multiple formation-dissociation processes on gas-liquid interfaces and subsequent hydrate behaviors.

CHEMICAL ENGINEERING SCIENCE (2022)

Article Engineering, Environmental

The promoting effect and mechanisms of oxygen-containing groups on the enhanced formation of methane hydrate for gas storage

Changrui Shi et al.

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)

Review Energy & Fuels

Review of gas hydrate anti-agglomerant screening techniques

Davi Costa Salmin et al.

Summary: This review article provides an overview of the current state-of-the-art in anti-agglomerant screening methods, including commonly used apparatuses and key parameters, and evaluates the advantages and disadvantages of each method and apparatus, serving as a tool for equipment selection in hydrate agglomeration studies.
Article Thermodynamics

Experimental study on the dual-gas co-production from hydrate deposit and its underlying gas reservoir

Rui Li et al.

Summary: Short production periods and high costs are obstacles for commercial exploitation of natural gas hydrates (NGHs). This study explores a method to prepare NGHs deposits with an underlying free gas layer and a hydrate layer on top, and conducts experiments to investigate its gas production characteristics. The results show that the temperature of the hydrate layer and the free gas layer exhibit different variations during gas production, and lower production pressure leads to higher gas production rate and recovery ratio. Setting the wellbore at the underlying free gas layer enhances hydrate decomposition and improves gas production efficiency.

ENERGY (2022)

Article Engineering, Chemical

Time series prediction of hydrate dynamics on flow assurance using PCA and Recurrent neural networks with iterative transfer learning

Nayoung Lee et al.

Summary: In this study, a novel framework based on deep learning models was proposed to predict the trend of hydrate formation using multivariate sensor data. The results showed that the approach had good performance in predicting the transition and segregation trends during hydrate formation and could be used for risk and issue detection in gas production systems.

CHEMICAL ENGINEERING SCIENCE (2022)

Article Energy & Fuels

Distribution and resource evaluation of natural gas hydrate in South China sea by combing phase equilibrium mechanism and volumetric method

Tong Wang et al.

Summary: The China Geological Survey conducted the second trial production of NGH in the Shenhu Area of the South China Sea. The results showed increased gas production and removal of technical obstacles. However, current NGH resource evaluation in the area is still at a prospective stage and cannot guide further exploration and development. This study used hydrate phase balance and volumetric methods to evaluate the resources and estimated the in-situ and recoverable NGH resources in the South China Sea.

PETROLEUM SCIENCE (2022)

Article Engineering, Chemical

Experimental and modeling study of the kinetics of methane hydrate formation and dissociation

Vafa Feyzi et al.

Summary: This study conducted experiments in a CSTR reactor at different temperatures and pressures to investigate the kinetics of methane hydrate formation and dissociation. The results showed that the mass transfer coefficients for methane hydrate dissociation were significantly higher than those for formation. Mathematical modeling can be used to predict methane production from naturally occurring methane hydrate deposits.

CHINESE JOURNAL OF CHEMICAL ENGINEERING (2021)

Article Energy & Fuels

Effects of depressurizing rate on methane hydrate dissociation within large-scale experimental simulator

Jing-Chun Feng et al.

Summary: The study found that increasing depressurizing rate leads to a decrease in gas production rate, but increasing depressurizing rate is beneficial for hydrate reformation during this period. The optimal depressurizing rate is obtained when the fluid velocity is in accordance with the heat transfer vector in the hydrate reservoir.

APPLIED ENERGY (2021)

Article Thermodynamics

Numerical simulation of gas production from permafrost hydrate deposits enhanced with CO2/N2 injection

Jing-Yu Kan et al.

Summary: A new numerical simulator was developed for hydrate exploitation by CO2/N-2-CH4 replacement. CO2/N-2 injection combined with depressurization was used for gas production in actual hydrate reservoirs. The study investigated the influence of feed gas composition and injection pressure on CO2 sequestration and CH4 production, and compared the advantages of CO2/N-2 injection over traditional methods.

ENERGY (2021)

Article Thermodynamics

The dual-functional roles of N2 gas for the exploitation of natural gas hydrates: An inhibitor for dissociation and an external guest for replacement

Junghoon Mok et al.

Summary: This study closely investigated the dissociation behavior and time-dependent guest distributions of methane (CH4) hydrate after injecting gaseous N-2 at different temperatures and pressures. Results showed that higher temperature and lower N-2 injecting pressure accelerated the dissociation kinetics of CH4 hydrate. Raman and NMR spectra confirmed the immediate capture of N-2 molecules in hydrate cages at 268.8 K, with N-2 incorporation increasing at higher pressure. C-13 NMR spectra revealed N-2-induced structural transitions in hydrates and the preferential capture of N-2 in small cages. The findings provide insights into the roles of N-2 molecules in inhibitor injection and CH4 - CO2 + N-2 replacement methods for gas hydrate exploitation.

ENERGY (2021)

Article Thermodynamics

New insights into the evaluation of kinetic hydrate inhibitors and energy consumption in rocking and stirred cells

Shima Foroutan et al.

Summary: This study compared the performance of rocking and stirred cells in KHIs tests and found that KHIs and synergists performed better in rocking cells. Energy consumption analysis revealed that rocking cells are more suitable for experimental development of KHIs.

ENERGY (2021)

Review Energy & Fuels

Review on the Applications and Modifications of the Chen-Guo Model for Hydrate Formation and Dissociation

Ling-Ban Wang et al.

Summary: The Chen-Guo model is a significant tool for studying gas hydrate formation and has been widely applied in modeling different systems. Many researchers have successfully improved and extended the model to adapt to more complex systems.

ENERGY & FUELS (2021)

Article Thermodynamics

An exergy-based energy efficiency analysis on gas production from gas hydrates reservoir by brine stimulation combined depressurization method

Xiao-Hui Wang et al.

Summary: The study proposed an exergy analysis method to evaluate the economic efficiency of NGHs exploitation process, and conducted analysis using data obtained through numerical simulations. By investigating the effects of operational parameters on net exergy production, optimal operating conditions were recommended.

ENERGY (2021)

Review Chemistry, Multidisciplinary

Natural gas hydrate resources and hydrate technologies: a review and analysis of the associated energy and global warming challenges

Yi-Song Yu et al.

Summary: NGHs serve as a carbon storage reservoir and have great application potential in reducing greenhouse gas emissions. However, the implications of NGH extraction and related technologies on future climate change mitigation are not deeply recognized, highlighting the need to address CCS challenges and technological risks imposed by natural gas-based global economy in the coming decades.

ENERGY & ENVIRONMENTAL SCIENCE (2021)

Article Energy & Fuels

Hydrate Management in Deadlegs: Effect of Pipe Size on Hydrate Deposition

Xianwei Zhang et al.

ENERGY & FUELS (2020)

Review Energy & Fuels

Review on the accumulation behavior of natural gas hydrates in porous sediments

Yan Xie et al.

JOURNAL OF NATURAL GAS SCIENCE AND ENGINEERING (2020)

Article Chemistry, Multidisciplinary

Ultra-rapid uptake and the highly stable storage of methane as combustible ice

Gaurav Bhattacharjee et al.

ENERGY & ENVIRONMENTAL SCIENCE (2020)

Article Engineering, Environmental

A new methane hydrate decomposition model considering intrinsic kinetics and mass transfer

Shangfei Song et al.

CHEMICAL ENGINEERING JOURNAL (2019)

Review Engineering, Chemical

Fundamental mechanisms and phenomena of clathrate hydrate nucleation

Jinlong Cui et al.

CHINESE JOURNAL OF CHEMICAL ENGINEERING (2019)

Review Energy & Fuels

Review of natural gas hydrates as an energy resource: Prospects and challenges

Zheng Rong Chong et al.

APPLIED ENERGY (2016)

Article Engineering, Chemical

Initial thickness measurements and insights into crystal growth of methane hydrate film

Sheng-Li Li et al.

AICHE JOURNAL (2013)

Article Engineering, Chemical

Investigation into the strength and source of the memory effect for cyclopentane hydrate

Hamidreza Sefidroodi et al.

CHEMICAL ENGINEERING SCIENCE (2013)

Article Engineering, Chemical

Comparison between equilibrium and kinetic models for methane hydrate dissociation

Yong Liu et al.

CHEMICAL ENGINEERING SCIENCE (2012)

Article Engineering, Chemical

CFD and experimental study on methane hydrate dissociation. Part II. General cases

Wu-Yang Sean et al.

AICHE JOURNAL (2007)

Article Engineering, Chemical

Notes on the dissolution rate of gas hydrates in undersaturated water

Gerard C. Nihous et al.

CHEMICAL ENGINEERING SCIENCE (2006)

Article Engineering, Chemical

Determination of the intrinsic kinetics of CO2 gas hydrate formation using in situ particle size analysis

MA Clarke et al.

CHEMICAL ENGINEERING SCIENCE (2005)

Article Geochemistry & Geophysics

Dissolution rates of pure methane hydrate and carbon-dioxide hydrate in undersaturated seawater at 1000-m depth

G Rehder et al.

GEOCHIMICA ET COSMOCHIMICA ACTA (2004)

Article Engineering, Chemical

Rigorous approach to the prediction of the heat of dissociation of gas hydrates

JH Yoon et al.

INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH (2003)

Article Chemistry, Physical

Upper limits on the rates of dissociation of clathrate hydrates to ice and free gas

JW Wilder et al.

JOURNAL OF PHYSICAL CHEMISTRY B (2002)

Article Engineering, Chemical

Determination of the activation energy and intrinsic rate constant of methane gas hydrate decomposition

M Clarke et al.

CANADIAN JOURNAL OF CHEMICAL ENGINEERING (2001)

Article Engineering, Chemical

Determination of the intrinsic rate of ethane gas hydrate decomposition

M Clarke et al.

CHEMICAL ENGINEERING SCIENCE (2000)