Article
Engineering, Environmental
Yi Lu, Hui Wang, Qingping Li, Xin Lv, Yang Ge, Lunxiang Zhang, Jiafei Zhao, Lei Yang, Yongchen Song
Summary: This study validates the feasibility of hydrate-based gas storage method for low-concentration flue gas through molecular dynamics simulations. The results show that proper subcooling can improve the hydrate growth rate and the occupancy of CO2 molecules in newly formed hydrate cages.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Green & Sustainable Science & Technology
Amin Hosseini Zadeh, Ijung Kim, Seunghee Kim
Summary: Hydrate-based CO2 sequestration (HBCS) is a new method to store large amounts of CO2 in geological sediments as crystalline solids. This study investigates the characteristics and kinetics of CO2 hydrate formation and dissociation under different conditions. The results suggest that hydrate nucleation and growth are limited in a porous medium due to solid particles, limited CO2 mass transfer, and heat transfer. Limited CO2 diffusion, hydrate nucleation, and better protection of hydrates are key factors for successful formation in the porous medium.
INTERNATIONAL JOURNAL OF GREENHOUSE GAS CONTROL
(2023)
Review
Energy & Fuels
Phakamile Ndlovu, Saeideh Babaee, Paramespri Naidoo
Summary: This article reviews the encapsulation process of carbon dioxide by replacing methane from natural gas hydrates, presenting and discussing methane-carbon dioxide replacement models. The variables affecting the replacement process and reported theoretical findings are reviewed, along with the challenges and limitations. The fundamentals of hydrate formation mechanisms on porous media are also detailed, and a comprehensive discussion and comparison of experimental studies involving different porous media materials and various additives are presented.
Article
Thermodynamics
Kai Zhang, Hon Chung Lau
Summary: The study investigates the feasibility of storing CO2 inside hydrate stability zone (HSZ) through reservoir pressure management via water producers and CO2 injectors. Results show that by controlling reservoir pressure, CO2 can be stored in HSZ with the formation of CO2 hydrate delaying CO2 breakthrough and limiting gas leakage. The research highlights the potential of storing CO2 in aquifers with a HSZ, with implications for CO2 geological storage.
Article
Engineering, Environmental
Mengya Niu, Zhenyuan Yin, Yifei Sun, Wei Fang, Guangjin Chen, Daoyi Chen
Summary: This study investigates the impact of key factors in the depressurization process on the formation of mixed hydrates, CO2 sequestration, and hydrate restoration. The results show that increasing CH4 production decreases CO2 sequestration and hydrate restoration.
CHEMICAL ENGINEERING JOURNAL
(2023)
Review
Thermodynamics
Saeid Sinehbaghizadeh, Agus Saptoro, Amir H. Mohammadi
Summary: Global warming, caused by anthropogenic CO2 emissions, has become a pressing environmental concern. Natural gas hydrate reservoirs have emerged as a potential source of energy and a possible solution for CO2 sequestration. CO2 hydrates, as safe and non-flammable compounds, can be used in industrial processes if their approaches can be improved. Laboratory experiments, process modelling, and molecular dynamics simulations can aid in understanding the properties and mechanisms of CO2 hydrates. This review focuses on the sequestration of CO2, process flow diagrams, the effects of hydrate promoters and porous media, and the fundamental properties of CO2 hydrates at the molecular level.
PROGRESS IN ENERGY AND COMBUSTION SCIENCE
(2022)
Article
Thermodynamics
Elaheh Sadeh, Abdolreza Farhadian, Abolfazl Mohammadi, Mina Maddah, Mahdi Pourfath, Mingjun Yang
Summary: The increased energy demand and population growth have resulted in a significant rise in atmospheric carbon dioxide (CO2). Natural gas and carbon capture and storage are crucial for efficient management. Gas hydrates have potential for CO2 capture and energy storage, but their slow formation kinetics have limited commercial usage. In this study, a novel anionic surfactant called aconitic acid (ASA) was developed to improve the formation kinetics of methane and CO2 hydrates. The experiments showed that even at low concentrations, ASA significantly enhanced the formation kinetics of methane hydrates. Molecular dynamics simulations revealed that ASA molecules increased the solubility of gas molecules in the solution, leading to enhanced hydrate growth. Furthermore, no foam formation occurred in the ASA solution at high concentrations. These findings highlight the potential of ASA as an efficient and foamless gas hydrate promoter for methane storage and CO2 capture applications.
ENERGY CONVERSION AND MANAGEMENT
(2023)
Article
Energy & Fuels
Junjie Ren, Siyu Zeng, Daoyi Chen, Mingjun Yang, Praveen Linga, Zhenyuan Yin
Summary: This study investigates the role of clay minerals in CO2 hydrate formation and dissociation in clay-rich sediments. It is found that the presence of sodium montmorillonite (Na-MMT) clay significantly reduces the induction time and growth rate of CO2 hydrate due to additional nucleation sites and induced surface electric field. The high viscosity of the suspension and the clay-induced strongly-polarized water layer impede the mass transfer of CO2, thereby retarding the overall kinetics of CO2 hydrate formation.
Article
Engineering, Environmental
Yu-Hsuan Ho, Yau Zu Khoo, Yan-Ping Chen, Ryo Ohmura, Li-Jen Chen
Summary: This study investigates the thermodynamic and kinetic influence of polyethylenimine (PEI) on the formation of methane and carbon dioxide hydrates. It is found that PEI acts as a thermodynamic inhibitor, inhibiting the formation of hydrates. However, it has different effects on methane and carbon dioxide hydrates kinetically, inhibiting methane hydrate formation and promoting carbon dioxide hydrate formation.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Green & Sustainable Science & Technology
Chandan Sahu, Anirbid Sircar, Jitendra S. Sangwai, Rajnish Kumar
Summary: This study focuses on the kinetics of CO2 hydrate formation in both pure water and seawater, with the use of low-concentration inorganic emulsifiers STPP and TSPP. The results demonstrate that STPP significantly improves the induction time and CO2 gas uptake, as well as the rate of hydrate formation.
INTERNATIONAL JOURNAL OF GREENHOUSE GAS CONTROL
(2022)
Article
Energy & Fuels
Vikas Dhamu, M. Fahed Qureshi, Saifudin Abubakar, Adam Usadi, Timothy A. Barckholtz, Ashish B. Mhadeshwar, Praveen Linga
Summary: Carbon capture and storage [CCS] is essential for reducing CO2 emissions, and one potential CCS concept is compressing and storing captured CO2 as gas hydrates in deep oceanic sediments. However, the high salinity of seawater may affect the formation and storage of CO2 hydrates. Therefore, it is crucial to understand the kinetics of liquid CO2 hydrate formation and dissociation in static brine systems.
Review
Energy & Fuels
Sergey Misyura, Pavel Strizhak, Anton Meleshkin, Vladimir Morozov, Olga Gaidukova, Nikita Shlegel, Maria Shkola
Summary: Gas hydrates have potential as energy sources and applications in gas separation, capture technologies, and seawater desalination. However, these technologies face challenges due to high power consumption, low growth rates, and lack of understanding about the combined effects of surfactants and the kinetics of CO2 hydrate dissociation. The presented review suggests ways to improve efficiency, such as using surfactants and enhancing heat and mass transfer, which can increase growth rates and transform water into gas hydrates. Considering the kinetics is important for gas hydrate storage, transportation technologies, and climate warming models in permafrost regions.
Article
Nanoscience & Nanotechnology
Yang Zhao, Mingzhao Yang, Man Li, Hongsheng Dong, Yang Ge, Qingping Li, Lunxiang Zhang, Yu Liu, Lei Yang, Yongchen Song, Jiafei Zhao
Summary: Efficient gas enrichment methods are crucial for the storage, transportation, and sequestration of clean energy and carbon dioxide. A novel recyclable hydrate promoter has been developed, which effectively reduces the induction time of methane hydrate formation, increases gas storage capacity, and inhibits foam during hydrate decomposition. Additionally, this promoter enhances CO2 storage capacity and shows potential for sequestering CO2 in the form of gas hydrate under the seafloor.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Energy & Fuels
Yang Zhao, Aoxing Qu, Mingzhao Yang, Hongsheng Dong, Yang Ge, Qingping Li, Yanzhen Liu, Lunxiang Zhang, Yu Liu, Lei Yang, Yongchen Song, Jiafei Zhao
Summary: This study presents a novel approach to storing hydrate in a naturally porous material - flexible balsa wood, enabling efficient energy storage. By surface modification and adjusting the water amount, the storage efficiency and capacity can be improved. This method also offers sustainability and recyclability.
Article
Engineering, Chemical
Ryosuke Ezure, Yuma Arai, Daiki Nakano, Hiroyuki Komatsu, Hideo Tajima
Summary: Hydrate-based gas separation is a method of separating gas mixtures based on their thermodynamic properties. This study proposes a new process for gas absorption and desorption under constant pressure with rising temperature. Theoretical calculations and experimental verification showed that SF6 can be concentrated up to 90% using this process.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Chemistry, Physical
Bo Ram Lee, Jeong-Hoon Sa, Sang Yeon Hong, Ju Dong Lee, Kun-Hong Lee, Yongwon Seo, Amadeu K. Sum
JOURNAL OF PHYSICAL CHEMISTRY C
(2019)
Article
Engineering, Chemical
Jeong-Hoon Sa, Aline Melchuna, Xianwei Zhang, Rigoberto Morales, Ana Cameirao, Jean-Michel Herri, Amadeu K. Sum
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2019)
Article
Energy & Fuels
Xianwei Zhang, Bo Ram Lee, Jeong-Hoon Sa, Kjell M. Askvik, Xiaoyun Li, Torstein Austvik, Amadeu K. Sum
Article
Energy & Fuels
Aline Melchuna, Xianwei Zhang, Jeong-Hoon Sa, Emilie Abadie, Philippe Glenat, Amadeu K. Sum
Article
Energy & Fuels
Xianwei Zhang, Jeong-Hoon Sa, Amadeu K. Sum
Article
Energy & Fuels
Jeong-Hoon Sa, Xianwei Zhang, Xiaoyun Li, Torstein Austvik, Kjell Askvik, Amadeu K. Sum
Article
Energy & Fuels
Jeong-Hoon Sa, Xianwei Zhang, Amadeu K. Sum
Article
Engineering, Chemical
Jeong-Hoon Sa, Amadeu K. Sum
Summary: The newly developed rock-flow cell is demonstrated to be a more robust testing tool for LDHI-AA qualification, providing advantages in visualization and quantification of hydrate formation and accumulation compared to the traditional rocking cell. It offers a closer representation of shear, phase dispersion, and flow regime in flowlines, making it more suitable for assessing hydrate slurry in oil/gas production systems.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2021)
Article
Engineering, Chemical
Jeong-Hoon Sa, Amadeu K. Sum
Summary: In this study, two different approaches were proposed to estimate the water activity for systems containing inhibitors: ice melting point and activity coefficient models. These methods provide a simple and reliable prediction of hydrate suppression temperatures for inhibited systems, advocating for their use over traditional methods.
Article
Chemistry, Multidisciplinary
Kwangbum Kim, Sang-Gyu Cho, Jeong-Hoon Sa
Summary: Carbon capture and sequestration using gas hydrates is a clean process gaining attention. Amino acids, with their unique hydrogen-bonding and hydrophilic properties, show promise as effective inhibitors for CO2 hydrates, lowering water activity, delaying formation kinetics, and surpassing traditional inhibitors in some cases. Their use minimizes environmental risks and corrosion issues, making them ideal for a wide range of temperature and pressure conditions required for carbon capture and sequestration processes.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2021)
Article
Thermodynamics
Kwangbum Kim, Hai Son Truong-Lam, Ju Dong Lee, Jeong-Hoon Sa
Summary: This article presents a method for achieving the highest CO2 and CH4 gas uptake kinetics in clathrate hydrates without any chemical additives or mechanical mixing. Using surface-modified silica sand in a fixed-bed reactor greatly enhances mass transfer. This method has significant implications for energy storage and carbon capture.
Article
Engineering, Chemical
Kwangbum Kim, Jeong-Hoon Sa
Summary: Capturing CO2 from exhaust gases by forming clathrate hydrates has great potential due to its mild operating conditions, economic feasibility, and environmental friendliness. However, the slow CO2 uptake kinetics and separation efficiency have hindered the realization of hydrate-based CO2 capture. In this study, the effect of the water-to-gas molar ratio (W/G ratio) on pre-combustion capture using clathrate hydrates was investigated, along with the use of residual liquid water and limiting the concentration of tetrahydrofuran (THF) to improve separation efficiency. Through a comprehensive evaluation, the optimal condition was determined to be 3 mol% THF + high W/G ratio. These findings emphasize the importance of considering the W/G ratio and its combined effects with other parameters for advanced pre-combustion capture using clathrate hydrates towards carbon neutrality.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Energy & Fuels
Jeong-Hoon Sa, Xianwei Zhang, Amadeu K. Sum
Article
Thermodynamics
Yong Cheng, Fukai Song, Lei Fu, Saishuai Dai, Zhiming Yuan, Atilla Incecik
Summary: This paper investigates the accessibility of wave energy absorption by a dual-pontoon floating breakwater integrated with hybrid-type wave energy converters (WECs) and proposes a hydraulic-pneumatic complementary energy extraction method. The performance of the system is validated through experiments and comparative analysis.
Article
Thermodynamics
Jing Gao, Chao Wang, Zhanwu Wang, Jin Lin, Runkai Zhang, Xin Wu, Guangyin Xu, Zhenfeng Wang
Summary: This study aims to establish a new integrated method for biomass cogeneration project site selection, with a focus on the application of the model in Henan Province. By integrating Geographic Information System and Multiple Criterion Decision Making methods, the study conducts site selection in two stages, providing a theoretical reference for the construction of biomass cogeneration projects.
Article
Thermodynamics
Mert Temiz, Ibrahim Dincer
Summary: The current study presents a hybrid small modular nuclear reactor and solar-based system for sustainable communities, integrating floating and bifacial photovoltaic arrays with a small modular reactor. The system efficiently generates power, hydrogen, ammonia, freshwater, and heat for residential, agricultural, and aquaculture facilities. Thermodynamic analysis shows high energy and exergy efficiencies, as well as large-scale ammonia production meeting the needs of metropolitan areas. The hybridization of nuclear and solar technologies offers advantages of reliability, environmental friendliness, and cost efficiency compared to renewable-alone and fossil-based systems.
Editorial Material
Thermodynamics
Wojciech Stanek, Wojciech Adamczyk
Article
Thermodynamics
Desheng Xu, Yanfeng Li, Tianmei Du, Hua Zhong, Youbo Huang, Lei Li, Xiangling Duanmu
Summary: This study investigates the optimization of hybrid mechanical-natural ventilation for smoke control in complex metro stations. The results show that atrium fires are more significantly impacted by outdoor temperature variations compared to concourse/platform fires. The gathered high-temperature smoke inside the atrium can reach up to 900 K under a 5 MW train fire energy release. The findings provide crucial engineering insights into integrating weather data and adaptable ventilation protocols for smoke prevention/mitigation.
Article
Thermodynamics
Da Guo, Heping Xie, Mingzhong Gao, Jianan Li, Zhiqiang He, Ling Chen, Cong Li, Le Zhao, Dingming Wang, Yiwei Zhang, Xin Fang, Guikang Liu, Zhongya Zhou, Lin Dai
Summary: This study proposes a new in-situ pressure-preserved coring tool and elaborates its pressure-preserving mechanism. The experimental and field test results demonstrate that this tool has a high pressure-preservation capability and can maintain a stable pressure in deep wells. This study provides a theoretical framework and design standards for the development of similar technologies.
Article
Thermodynamics
Aolin Lai, Qunwei Wang
Summary: This study assesses the impact of China's de-capacity policy on renewable energy development efficiency (REDE) using the Global-MSBM model and the difference-in-differences method. The findings indicate that the policy significantly enhances REDE, promoting technological advancements and marketization. Moreover, regions with stricter environmental regulations experience a higher impact.
Article
Thermodynamics
Mostafa Ghasemi, Hegazy Rezk
Summary: This study utilizes fuzzy modeling and optimization to enhance the performance of microbial fuel cells (MFCs). By simulating and analyzing experimental data sets, the ideal parameter values for increasing power density, COD elimination, and coulombic efficiency were determined. The results demonstrate that the fuzzy model and optimization methods can significantly improve the performance of MFCs.
Article
Thermodynamics
Zhang Ruan, Lianzhong Huang, Kai Wang, Ranqi Ma, Zhongyi Wang, Rui Zhang, Haoyang Zhao, Cong Wang
Summary: This paper proposes a grey box model for fuel consumption prediction of wing-diesel hybrid vessels based on feature construction. By using both parallel and series grey box modeling methods and six machine learning algorithms, twelve combinations of prediction models are established. A feature construction method based on the aerodynamic performance of the wing and the energy relationship of the hybrid system is introduced. The best combination is obtained by considering the root mean square error, and it shows improved accuracy compared to the white box model. The proposed grey box model can accurately predict the daily fuel consumption of wing-diesel hybrid vessels, contributing to operational optimization and the greenization and decarbonization of the shipping industry.
Article
Thermodynamics
Huayi Chang, Nico Heerink, Junbiao Zhang, Ke He
Summary: This study examines the interaction between off-farm employment decisions between couples and household clean energy consumption in rural China, and finds that two-paycheck households are more likely to consume clean energy. The off-farm employment of women is a key factor driving household clean energy consumption to a higher level, with wage-employed wives having a stronger influence on these decisions than self-employed ones.
Article
Thermodynamics
Hanguan Wen, Xiufeng Liu, Ming Yang, Bo Lei, Xu Cheng, Zhe Chen
Summary: Demand-side management is crucial to smart energy systems. This paper proposes a data-driven approach to understand the relationship between energy consumption patterns and household characteristics for better DSM services. The proposed method uses a clustering algorithm to generate optimal customer groups for DSM and a deep learning model for training. The model can predict the possibility of DSM membership for a given household. The results demonstrate the usefulness of weekly energy consumption data and household socio-demographic information for distinguishing consumer groups and the potential for targeted DSM strategies.
Article
Thermodynamics
Xinglan Hou, Xiuping Zhong, Shuaishuai Nie, Yafei Wang, Guigang Tu, Yingrui Ma, Kunyan Liu, Chen Chen
Summary: This study explores the feasibility of utilizing a multi-level horizontal branch well heat recovery system in the Qiabuqia geothermal field. The research systematically investigates the effects of various engineering parameters on production temperature, establishes mathematical models to describe their relationships, and evaluates the economic viability of the system. The findings demonstrate the significant economic feasibility of the multi-level branch well system.
Article
Thermodynamics
Longxin Zhang, Songtao Wang, Site Hu
Summary: This investigation reveals the influence of tip leakage flow on the modern transonic rotor and finds that the increase of tip clearance size leads to a decline in rotor performance. However, an optimal tip clearance size can extend the rotor's stall margin.
Article
Thermodynamics
Kristian Gjoka, Behzad Rismanchi, Robert H. Crawford
Summary: This paper proposes a framework for assessing the performance of 5GDHC systems and demonstrates it through a case study in a university campus in Melbourne, Australia. The results show that 5GDHC systems are a cost-effective and environmentally viable solution in mild climates, and their successful implementation in Australia can create new market opportunities and potential adoption in other countries with similar climatic conditions.
Article
Thermodynamics
Jianwei Li, Guotai Wang, Panpan Yang, Yongshuang Wen, Leian Zhang, Rujun Song, Chengwei Hou
Summary: This study proposes an orientation-adaptive electromagnetic energy harvester by introducing a rotatable bluff body, which allows for self-regulation to cater for changing wind flow direction. Experimental results show that the output power of the energy harvester can be greatly enhanced with increased rotatory inertia of the rotating bluff body, providing a promising solution for harnessing wind-induced vibration energy.
