Article
Energy & Fuels
Ni Liu, Fei Meng, Litao Chen, Liang Yang, Daoping Liu
Summary: This study investigated the effects of two carbon nanomaterials on the gas storage performance of CO2 hydrate. It was found that the MWCNT-HB system showed a stronger ability to improve gas storage performance compared to the MWCNT system. Secondary formation of hydrate in the MWCNT-HB system was observed, leading to an increase in gas storage capacity.
Article
Engineering, Chemical
Nayla Lozada Garcia, Daniela S. Damaceno, Lucidio C. Fardelone, Adriano Ferreira de Mattos Silvares, Joao Pedro Ferreira Del Pintorc, Afonso Henrique Teixeira Mendes, Marcelo F. Costa, Jose Carlos B. Lopes, Song Won Park, Jose Roberto Nunhez
Summary: A scalable continuous process for obtaining CO2 hydrates with high heat removal capacity is proposed. Experimental results show that the process can rapidly form high-concentration hydrates and has higher gas uptake compared to batch systems. The process has the potential to be an effective alternative for CO2 sequestration due to its superior heat removal and mass transfer capabilities.
CHEMICAL ENGINEERING SCIENCE
(2023)
Article
Engineering, Environmental
Chanjuan Liu, Zhen Long, Yong He, Xuebing Zhou, Deqing Liang
Summary: This study investigates the growth and storage performance of CO2 hydrates under different conditions, and finds that the water film on silica gel particles is the main factor affecting gas storage efficiency. Silica gels with 30% water saturation can achieve the highest CO2 storage capacity. In addition, it is found that SDS can increase the CO2 storage volume ratio under high water saturation and reduce the volume ratio decay in repeated tests.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Energy & Fuels
Xuemin Zhang, Mengjun Zhang, Pengyu Li, Jinping Li, Yingmei Wang, Qingbai Wu
Summary: This study investigated the formation characteristics of CO2 hydrate in porous media with the addition of Sodium Dodecyl Sulfate (SDS). The results showed that surfactant can promote the formation process of CO2 hydrate and increase the gas storage capacity. Temperature and SDS concentration also play a role in hydrate formation.
Article
Energy & Fuels
Shuai Wang, Changrui Shi, Huiquan Liu, Lunxiang Zhang, Jiafei Zhao, Yongchen Song, Zheng Ling
Summary: This study demonstrates a simple strategy to fabricate composite aerogels for boosting CO2 hydrate formation using natural vermiculite and MXene nanosheets. The research finds that by controlling the mass ratio of vermiculite and MXene, the structure and surface functional groups of the aerogels can be finely tuned, leading to enhanced CO2 storage capacity and hydrate formation kinetics.
Article
Thermodynamics
Qi Zhao, Zhao-Yang Chen, Xiao-Sen Li, Zhi-Ming Xia
Summary: This study investigates the influence of an electrostatic field on the formation of CO2 hydrate in fresh water, memory water, and saltwater systems. Experimental results show that the presence of an electrostatic field can promote the nucleation and growth of CO2 hydrate. However, the electrostatic field weakens the memory effect in the memory water system and increases the completion time of hydrate formation in the salt water system.
Article
Energy & Fuels
Amin Hosseini Zadeh, Ijung Kim, Seunghee Kim
Summary: The experiment showed that the amount of CO2 has a significant impact on the formation and dissociation of CO2 hydrate. In the CO2-limited condition, CO2 was insufficient to saturate water leading to no hydrate crystal formation, while in the water-limited condition, CO2 fully saturated water resulting in hydrate crystal formation. Increasing CO2 ratio led to denser and more stable CO2 hydrate formation.
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2021)
Article
Energy & Fuels
Yingfei Wang, Bo Dong, Ping Wang, Lunxiang Zhang, Cong Chen, Yan Qin, Yang Liu, Weizhong Li, Yongchen Song
Summary: This study develops a model to investigate the effects of initial water on CO2-CH4 dynamic replacement in a hydrate in a pore network, and validates the model with a previous experiment. The results show that the presence of initial water leads to a faster carbon dioxide displacement, weaker methane hydrate dissociation, more pure carbon dioxide hydrate formation, similar mixed hydrate generation, and a lower exchange rate. The exchange reaction starts at the edges of hydrate distribution areas and progresses towards the inside.
Article
Engineering, Environmental
Yu Feng, Yang Zhao, Yuze Han, Yanzhen Liu, Lunxiang Zhang, Jiafei Zhao, Lei Yang, Yongchen Song
Summary: The formation and dissociation behavior of CO2 hydrates in the presence of clay particles were investigated using low-field nuclear magnetic resonance. It was found that montmorillonite particles significantly promoted the conversion of water into hydrate, while illite particles had a weaker promoting effect. According to the DLVO theory, the total interaction potential between montmorillonite particles was much higher than that between illite particles.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Energy & Fuels
Sai Kiran Burla, Bhavya Tulluru, Pinnelli S. R. Prasad
Summary: Amino acids are important additives in gas-hydrate based technology, playing a dual role as inhibitors or promoters depending on concentration. The nature of the side chain and its length are critical factors, with different amino acids affecting CO2 and CH4 hydrates differently.
Article
Engineering, Environmental
Jie Xu, Qinglin Chen, Jianwei Du
Summary: Inducing pure methane hydrate from double methane semi-clathrate hydrate is a promising method to enhance methane storage efficiency. This study used a halogen-free semi-clathrate hydrate former to conduct comprehensive experiments, showing significant improvements in methane uptake.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Thermodynamics
Shuanshi Fan, Yan Wang, Yanhong Wang, Xuemei Lang, Shenglong Wang
Summary: The study simulated and optimized three possible gas storage processes and found that hydrate-based natural gas (HNG) has low specific energy consumption, CAPEX, equipment weight, and short payback period, making it suitable for offshore small-scale natural gas production.
ENERGY CONVERSION AND MANAGEMENT
(2021)
Article
Engineering, Environmental
Bo-Jian Cao, Yi-Fei Sun, Hong-Nan Chen, Jin-Rong Zhong, Ming-Long Wang, Meng-Ya Niu, Jing-Yu Kan, Chang-Yu Sun, Dao-Yi Chen, Guang-Jin Chen
Summary: The combination of CO2/H2 injection and CH4 production with in situ steam reformation of CH4 offers a promising solution to green energy production and CO2 storage. However, the challenge lies in balancing CH4 recovery and CO2 storage. This study explores changing the composition of the injected gas at different stages to achieve high CO2 sequestration and CH4 recovery simultaneously, showing promising results in terms of CH4 recovery ratios, gas concentration, gas injection-production ratio, and H2 utilization efficiency. The approach proves to be economically viable and has potential for effective and safe exploitation of gas hydrate.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Thermodynamics
Jiang Bian, Hongchao Wang, Kairan Yang, Junwen Chen, Xuewen Cao
Summary: The submarine CO2 hydrate-based geological storage is an effective method for carbon capture and storage, which is significant for mitigating the greenhouse effect. The pressure and temperature variation can affect the storage stability of CO2 hydrate. Experimental studies show that the energy distribution in the hydrate mixed system is uneven during dissociation, and the heat flux flows to the region with high sensible heat consumption.
Article
Energy & Fuels
Yimao Shen, Zhi Li, Jingtao Hu, Yue Zhang, Tianduo Li, Guangjin Chen
Summary: Gas hydrate technology is a promising gas storage method with great potential. The addition of additives such as THF and TBAB can significantly improve the gas storage performance of the fixed bed. Using diesel oil to establish gas channels in the bed can also enhance the gas mass transfer. However, the simultaneous addition of diesel oil and THF may lead to competition between the two accelerators, resulting in less significant improvement in gas storage density.
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.