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Journals
Processes
Special Issues
Production of Energy-Efficient Natural Gas Hydrate
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Production of Energy-Efficient Natural Gas Hydrate

A special issue of Processes (ISSN 2227-9717). This special issue belongs to the section "Energy Systems".

Deadline for manuscript submissions: 20 February 2025 | Viewed by 7759

Special Issue Editors

Dr. Tao Yu

E-Mail Website
Guest Editor
School of Energy and Power Engineering, Dalian University of Technology, Dalian 116024, China
Interests: natural gas hydrate exploitation; CO2 capture and storage; heat and mass transfer in porous media; gas-liquid two-phase flow; multiscale numerical simulation
Dr. Zhenyuan Yin

E-Mail Website
Guest Editor
Institute for Ocean Engineering, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, China
Interests: natural gas hydrate; CO2 hydrate; thermodynamics; kinetics; numerical modeling; reservoir simulation
Special Issues, Collections and Topics in MDPI journals
Dr. Bingbing Chen

E-Mail Website
Guest Editor
Key Laboratory of Ocean Energy Utilization and Energy Conservation of Ministry of Education, Dalian University of Technology, Dalian 116024, China
Interests: natural gas hydrate production; CCUS; hydrate technology; wastewater treatment
Dr. Pengfei Wang

E-Mail Website
Guest Editor
Academy for Advanced Interdisciplinary Studies, South University of Science and Technology, Shenzhen 518055, China
Interests: hydrate-based CO2 capture; hydrogen storage by hydrate method; natural gas hydrate production
Dr. Ying Teng

E-Mail Website
Guest Editor
Institute of Deep Earth Science & Green Energy, Shenzhen University, Shenzhen 518060, China
Interests: carbon dioxide; gas hydrates; transport in porous media; mass transfer; fluid flow; magnetic resonance imaging; micro-CT

Special Issue Information

Dear Colleagues,

Natural gas hydrate is considered as a promising source of energy for the 21st century, which has attracted widespread attention for the last decades. Although there have been several field production tests from land and marine hydrate reservoirs worldwide, challenges and open questions still remain prior to the commercial exploitation of natural gas hydrates. This requires a fundamental understanding of these resources as well as their application in energy-environment related areas.

The special issue, “Production of Energy-efficient Natural Gas Hydrate”, aims to report on the latest findings on hydrates from researchers around the world, covering experimental, theoretical, and simulation studies. We encourage original research papers on this special issue from a wide range of topics regarding hydrates including, but not limited to:

  • Fundamentals of gas hydrate phase transfer
  • Natural gas hydrate production technologies
  • Environmental impacts of gas hydrate (Climate, Geohazard,etc.)
  • Natural gas hydrate resource (Characterization, Exploration, Recovery, etc.)
  • Flow assurance
  • Hydrate-based CO2 capture and storage
  • Numerical simulation (Laboratory scale, Site scale, Prediction etc.)

Dr. Tao Yu
Dr. Zhenyuan Yin
Dr. Bingbing Chen
Dr. Pengfei Wang
Dr. Ying Teng
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Processes is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2400 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • natural gas hydrate
  • production technology
  • environmental impact
  • energy-efficient
  • flow assurance

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Published Papers (6 papers)

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Research

19 pages, 3059 KiB  
Article
Enhanced Study of CO2 Hydrate Formation in Marine Oil–Gas Based on Additive Effect
by Yang Ge, Haihong Chen, Rui Qin, Haiyuan Yao, Ting Huang, Xin Lv, Huiyong Liang and Shi Shen
Processes 2024, 12(11), 2315; https://doi.org/10.3390/pr12112315 - 22 Oct 2024
Viewed by 673
Abstract
During marine oil–gas extraction, significant amounts of carbon dioxide (CO2) gas are often produced. Effectively separating these associated CO2 gases during extraction has become a critical technical challenge. Therefore, this paper aims to enhance the efficiency of CO2 hydrate-based [...] Read more.
During marine oil–gas extraction, significant amounts of carbon dioxide (CO2) gas are often produced. Effectively separating these associated CO2 gases during extraction has become a critical technical challenge. Therefore, this paper aims to enhance the efficiency of CO2 hydrate-based capture technology and conduct relevant research. The goal is to increase the driving force for hydrate formation by combining the traditional thermodynamic additive TBAB with pressure modulation and to improve the hydrate formation rate through the use of multiple kinetic promoters. This paper presents the initial investigation into the effect of the thermodynamic accelerator tetrabutylammonium bromide (TBAB) on the characteristics of CO2 hydrate formation. The promotion effects of TBAB solutions with varying mass concentrations (3%, 5%, 7.5%, 10%) and reaction pressures (3 MPa, 4 MPa) were subjected to a systematic analysis, and the optimal conditions were identified as 4 MPa and a 5 wt% TBAB concentration. Subsequently, the impact of combining TBAB with kinetic promoters (SDS, nano Al2O3, L-methionine, L-leucine) on CO2 hydrate generation characteristics was further investigated. In this paper, the effect of a single promoter on the generation characteristics of CO2 hydrate was investigated, and the efficient carbon trapping ability of the complex promoter was verified, which provides theoretical support for the application of CO2 trapping technology using the hydrate method. Full article
(This article belongs to the Special Issue Production of Energy-Efficient Natural Gas Hydrate)
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14 pages, 5419 KiB  
Article
Adsorption and Diffusion Properties of Gas in Nanopores of Kerogen: Insights from Grand Canonical Monte Carlo and Molecular Dynamics Simulations
by Shouheng Xiao, Xiugang Liu, Yun Li, Qiang Zheng, Ning Wang, Yun Qiao, Youyin Zhang and Chuanjun Yi
Processes 2024, 12(7), 1438; https://doi.org/10.3390/pr12071438 - 9 Jul 2024
Viewed by 794
Abstract
Investigating the adsorption and diffusion processes of shale gas within the nanopores of kerogen is essential for comprehending the presence of shale gas in organic matter of shale. In this study, an organic nanoporous structure was constructed based on the unit structure of [...] Read more.
Investigating the adsorption and diffusion processes of shale gas within the nanopores of kerogen is essential for comprehending the presence of shale gas in organic matter of shale. In this study, an organic nanoporous structure was constructed based on the unit structure of Longmaxi shale kerogen. Grand canonical Monte Carlo and molecular dynamics simulation methods were employed to explore the adsorption and diffusion mechanisms of pure CH4, CO2, and N2, as well as their binary mixtures with varying mole fractions. The results revealed that the physical adsorption characteristics of CH4, CO2, and N2 gases on kerogen adhered to the Langmuir adsorption law. The quantity of adsorbed gas molecules increased with rising pressure but decreased with increasing temperature. The variation in the heat of adsorption was also analyzed. Under identical temperature and pressure conditions, the adsorption of CH4 increased with higher mole fractions of CH4, whereas it decreased with greater mole fractions of CO2 and N2. Notably, CO2 molecules exhibited a robust interaction with kerogen molecules compared to the adsorption properties of CH4 and N2. Furthermore, the self-diffusion coefficient of gas within kerogen nanopores gradually decreased with increasing pressure or decreasing temperature. The diffusion capacity of gas molecules followed the descending order N2 > CH4 > CO2 under the same pressure and temperature conditions. Full article
(This article belongs to the Special Issue Production of Energy-Efficient Natural Gas Hydrate)
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15 pages, 6852 KiB  
Article
Vortex of a Symmetric Jet Structure in a Natural Gas Pipeline via Proper Orthogonal Decomposition
by Lihao Li, Jiaxing Lu, Haoyu Zhao and Yilong Qiu
Processes 2024, 12(2), 418; https://doi.org/10.3390/pr12020418 - 19 Feb 2024
Viewed by 896
Abstract
The impact of particle addition jets on the flow field in natural gas pipelines was investigated, and the structural information of the flow field at different flow velocities in a symmetric jet flow was analyzed via numerical simulation. The results of coherent structures [...] Read more.
The impact of particle addition jets on the flow field in natural gas pipelines was investigated, and the structural information of the flow field at different flow velocities in a symmetric jet flow was analyzed via numerical simulation. The results of coherent structures in the high-pressure natural gas pipeline reveal vortex structures of varying sizes both upstream and downstream of the jet flow. To determine the spatial distribution of the main vortex structures in the flow field, proper orthogonal decomposition (POD) mode analysis was performed on the unsteady numerical results. Moreover, the detailed spatial characteristics of the coherent vortex structures represented by each mode were obtained. The results indicate that the large-scale vortex structures within the pipeline are balanced and stable, with their energy increasing as the jet flow velocity increases. Additionally, higher-order modes exhibit significant shedding of small-scale vortex structures downstream of the jet flow. In this research, coherent structures present in symmetric particle addition jets are provided, offering theoretical support for future investigations on the distribution of particle image velocimetry (PIV) flowmeters. Full article
(This article belongs to the Special Issue Production of Energy-Efficient Natural Gas Hydrate)
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13 pages, 3535 KiB  
Article
Effect of Different Concentrations of NiMnGa Micro/Nanoparticles on the Kinetics of Natural Gas Hydration
by Zhiwei Zhao, Qiong Wu, Zhen Li, Huiyuan Meng, Maged Elhefnawey, Xinyan Wang, Qiang Wu, Li Li and Baoyong Zhang
Processes 2023, 11(11), 3149; https://doi.org/10.3390/pr11113149 - 4 Nov 2023
Viewed by 1178
Abstract
To improve gas hydrate storage and transportation technology, ferromagnetic intermetallic compound NiMnGa particles with martensitic transformation endothermics were used to form micro/nanofluids with sodium dodecyl sulfate (SDS) to further strengthen the gas hydration process. In this work, the kinetic process of gas hydration [...] Read more.
To improve gas hydrate storage and transportation technology, ferromagnetic intermetallic compound NiMnGa particles with martensitic transformation endothermics were used to form micro/nanofluids with sodium dodecyl sulfate (SDS) to further strengthen the gas hydration process. In this work, the kinetic process of gas hydration in NiMnGa fluids with different concentrations (0, 0.1, 1, 2, and 3 wt.%) was investigated using a rotating magnetic field gas hydration separation experimental setup. The results show that the induction time of the 3 wt.% NiMnGa system was shortened by 98.3%, the gas consumption was increased by 50.5%, and the gas consumption rate was increased by 351.9% compared with the SDS system. Therefore, it is inferred from the mass transfer that NiMnGa micro/nanofluids can accelerate the formation of hydrates. Full article
(This article belongs to the Special Issue Production of Energy-Efficient Natural Gas Hydrate)
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16 pages, 7271 KiB  
Article
Numerical Simulation of Optimized Step-Wise Depressurization for Enhanced Natural Gas Hydrate Production in the Nankai Trough of Japan
by Kunpeng Xue, Yu Liu, Tao Yu and Junchen Lv
Processes 2023, 11(6), 1812; https://doi.org/10.3390/pr11061812 - 14 Jun 2023
Cited by 5 | Viewed by 1403
Abstract
The utilization of natural gas hydrates as an alternative energy source has garnered significant attention due to their proven potential. Despite the successful offshore natural gas hydrate production tests, commercial exploitation has not been achieved. This study aims to enhance the understanding of [...] Read more.
The utilization of natural gas hydrates as an alternative energy source has garnered significant attention due to their proven potential. Despite the successful offshore natural gas hydrate production tests, commercial exploitation has not been achieved. This study aims to enhance the understanding of gas production behavior through simulations from a single vertical well in the Nankai Trough and assess the effectiveness of the step-wise depressurization method for gas production using TOUGH + HYDRATE. The simulation results showed that the effective permeability for the water phase decreased as the hydrates were decomposed, and the invasion of the pore water from the underburden eliminated this effect. Compared with the direct depressurization method, the step-wise depressurization method significantly increased the cumulative gas production by more than 10% and mitigated the rapid generation of gas and water production during the moment of depressurization. The results also indicated that the depressurization gradient was more sensitive to the cumulative gas production than the maintenance time of depressurization. In view of the gas and water production characteristics coupled with the challenges in carrying out the step-wise depressurization method, it is suggested that a depressurization gradient of 1 MPa and a maintenance time of 1 day should be employed. Full article
(This article belongs to the Special Issue Production of Energy-Efficient Natural Gas Hydrate)
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15 pages, 4212 KiB  
Article
Analysis of Influencing Factors in Pilot Experiment for Synthesis of Natural Gas Hydrate by Spray Method
by Yun Ma, Jinzhao Zhu, Qingguo Meng, Chunxiao Ding, Jinbing Teng, Xin Wang and Qian Lu
Processes 2022, 10(12), 2740; https://doi.org/10.3390/pr10122740 - 19 Dec 2022
Viewed by 1673
Abstract
In recent years, the technology of storing and transporting natural gas in the form of hydrate has received a lot of attention. At present, the research on the synthesis of natural gas hydrate for the purpose of storage and transportation is still in [...] Read more.
In recent years, the technology of storing and transporting natural gas in the form of hydrate has received a lot of attention. At present, the research on the synthesis of natural gas hydrate for the purpose of storage and transportation is still in the laboratory stage, and its synthesis process is in the design and conception stage. The influencing factors of natural gas hydrate synthesis under pilot-scale conditions are more complex. Moreover, pilot experiments are oriented to actual production, and its economic feasibility and operational convenience have higher requirements. This paper aimed to study the influencing factors of gas hydrate synthesis by spray method under pilot-scale conditions. Under specific conditions of surfactant and pressure, we carried out research on the effects of reaction temperature, different forms of atomizers, high-pressure pump flow, experimental water, and other factors. Experiments show that the optimal synthesis conditions were a temperature of −5 °C, a pressure of 5 MPa, a conical nozzle, a generated gas hydrate as the hydrate of type I structure, and a gas storage capacity of 1:123 (gas–water ratio). Full article
(This article belongs to the Special Issue Production of Energy-Efficient Natural Gas Hydrate)
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