Article
Chemistry, Physical
Shengli Liu, Wenxiu Zhang, Huanhua Wu, Jiaheng Wang, Yongqi Yuan, Sikai Wang, Jinxiang Liu
Summary: Clathrate hydrate is a promising candidate for hydrogen storage, and the addition of natural gas can reduce the formation pressure and improve energy density. Through calculations and simulations, we estimated the hydrogen storage capacity of H2-CH4 binary hydrate and studied its thermodynamical and mechanical stability. The binary hydrate can maintain its structure under moderate temperature and pressure, and exhibits a self-preservation effect at -270 K, making it suitable for hydrogen storage and transport. These findings enhance our understanding of mixed hydrate as a viable hydrogen storage technology for achieving a sustainable hydrogen economy.
JOURNAL OF MOLECULAR LIQUIDS
(2023)
Article
Chemistry, Physical
Asheesh Kumar, Hari Prakash Veluswamy, Sanat Kumar, Rajnish Kumar, Praveen Linga
Summary: Clathrate hydrate-based sustainable technologies, such as solidified natural gas (SNG) technology, show great potential for storing natural gas. Experiments on mixed hydrates in a seawater environment reveal the promotional effect of seawater on hydrate formation and suggest the economic feasibility of using natural seawater to enhance SNG technology.
JOURNAL OF PHYSICAL CHEMISTRY C
(2021)
Article
Chemistry, Physical
Satoshi Takeya, Sanehiro Muromachi, Akio Yoneyama, Keiichi Hirano, Kazuyuki Hyodo, John A. Ripmeester
Summary: Methane hydrate in the superheated state can be stored for a long time, and by coating it with other hydrates, the need for a defect-free interface between different hydrates can be eliminated. This study found that liquid cyclopentane can keep gas hydrate crystals intact and convert the outer layer of methane hydrate into cyclopentane hydrate.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2022)
Article
Chemistry, Multidisciplinary
Feng Zhang, Hao Ni, Yi Wang, Fujun Xia, Baojun Wei, Xuefeng Liu
Summary: By using classical molecular dynamics simulations, the mechanical stability of CO2-N2 heteroclathrate hydrates (CNHHs) under uniaxial loading was investigated. The ratio of CO2 to N2 in the large and small water cages was found to have a crucial effect on the mechanical properties and fracture behaviors of CNHHs. The occupancy of small cages by CO2 was identified as a decisive factor affecting fracture position, leading to brittle or ductile fracture behavior. These findings provide insights into the deformation and fracture mechanisms of heteroclathrate hydrates and the impact of CO2 sequestration on the stability of gas hydrate reservoirs.
CRYSTAL GROWTH & DESIGN
(2023)
Article
Energy & Fuels
Xinlu Han, Zhihua Wang, Riyi Lin, Alexander A. Konnov
Summary: This study investigates the phenomenon of SAFT in the CH4 + O2 + N2 and NH3 + O2 + N2 flames and examines the relationship between SAFT and laminar burning velocities. Experimental measurements and simulations reveal different SAFT regimes for CH4 and NH3 flames, and demonstrate the connection between SAFT extent and laminar burning velocity.
Article
Astronomy & Astrophysics
Elodie Gloesener, Ozgur Karatekin, Veronique Dehant
Summary: The study investigated the distribution and stability depth of CH4-rich clathrate hydrates in the Martian soil, finding that they are shallower in high latitude regions and deeper at the equator. Factors influencing the stability of clathrates were considered, such as gas phase composition and presence of brines.
Article
Energy & Fuels
Yan Wang, Xinyi Chen, Zheng Chen
Summary: This study explores the application of methane-oxygen burning in rocket engines. By simulating homogeneous ignition processes and premixed flames, the effects of various factors on super-adiabatic temperature (SAT) are evaluated and the key reactions involved are identified. It is found that SAT is mainly caused by the dissociation reactions of water, hydrogen, and carbon dioxide.
Article
Thermodynamics
Giorgia De Guido, Elvira Spatolisano
Summary: This study focuses on solid-vapor equilibria and solid-liquid-vapor equilibria of carbon dioxide in mixtures for gas purification and biogas upgrading. An algorithm for solving flash calculations coupled with phase stability analysis is proposed, showing good agreement with experimental data and suggesting further experimental studies on multicomponent mixtures.
JOURNAL OF CHEMICAL AND ENGINEERING DATA
(2021)
Article
Engineering, Environmental
Seungin Lee, Yusung Ok, Yunseok Lee, Dongju Seo, Seokyoon Moon, Youngjune Park
Summary: In this study, cyclopentyl amine (CPA) was introduced as a potential thermodynamic promoter for methane (CH4) storage. The results showed that CPA could form hydrate without the help of gas and work as a thermodynamic promoter for CH4. Tuning phenomena were observed below a certain concentration of CPA.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
Article
Energy & Fuels
Feixiang Zhong, Ligang Zheng, Xi Wang, Xiangyu Shao, Hailin Jia, Zhanwang Shi, Jianlei Zhang
Summary: This study investigates the flame instabilities and combustion characteristics of oxygen-enriched methane in a closed chamber. Distorted tulip flames and corrugated flames are observed for the first time in these mixtures. The diluents CO2/N-2 and N-2 exhibit distinct flame instabilities. The Darrieus-Landau instability is positively correlated with the oxygen enrichment ratio, while the Thermal-Diffusive instability is affected by the oxygen enrichment ratio in both positive and negative ways.
JOURNAL OF THE ENERGY INSTITUTE
(2022)
Article
Thermodynamics
Ruyi Zheng, Zhaoqi Fan, Xiaoli Li, Shahin Negahban
Summary: A new thermodynamic model was developed to improve the prediction accuracy of the equilibrium phase boundary of CH4, CO2, and binary CH4-CO2 hydrates in water. By utilizing a newly generated database, the study successfully captured the impacts of temperature, NaCl concentration, and gas composition on the phase boundary of gas hydrates. Overall, the performance of the newly developed model is satisfactory.
JOURNAL OF CHEMICAL THERMODYNAMICS
(2021)
Article
Chemistry, Multidisciplinary
Antoine Patt, Sylvain Picaud
Summary: This study used Monte Carlo simulations to investigate the competitive trapping of methane and ethane molecules into clathrate hydrates under Titan-like temperature conditions. The results show that ethane molecules can be trapped at lower pressures than methane, with a preference for the large cages of the clathrate lattice. Increasing pressure may lead to ethane molecules also occupying the small cages, potentially competing with methane molecules at high pressure.
ACS EARTH AND SPACE CHEMISTRY
(2021)
Article
Chemistry, Physical
S. Blazquez, M. M. Conde, C. Vega, E. Sanz
Summary: CO2 and CH4 hydrates are important both energetically and environmentally. Molecular dynamics simulations reveal that the growth rate of these hydrates is affected by the incorporation of guest molecules, with CO2 hydrate growing faster due to higher solubility. Additionally, higher temperatures require more molecular motion for solid growth. Our calculations show good agreement with experiments of hydrate growth along the guest-solution interface, but further work is needed to reconcile different experimental results.
JOURNAL OF CHEMICAL PHYSICS
(2023)
Article
Thermodynamics
Lingli Shi, Yong He, Jingsheng Lu, Deqing Liang
Summary: Mixed TBAC + TBPC was found to have a higher stabilization effect on CH4 hydrate, significantly enhancing the stability and stored energy of the hydrate. The dissociation enthalpies of the mixed hydrate were also calculated, showing a higher range compared to pure CH4 hydrate.
JOURNAL OF CHEMICAL AND ENGINEERING DATA
(2021)
Article
Thermodynamics
Shijie Xu, Yue Qiu, Leilei Xu, Jianqing Huang, Shen Li, Elna J. K. Nilsson, Zhongshan Li, Weiwei Cai, Marcus Alden, Xue-Song Bai
Summary: Metal powder is a promising carbon-free and recyclable energy carrier. In this study, a computational model for the combustion and phase change of micron-sized iron particles was proposed and validated. The model successfully captures the melting, surface reactions, cooling, and solidification processes. The study also reveals a two-stage solidification phenomenon and identifies a diffusion-controlled mechanism during the melting process. The reaction between iron and CH4/O2/N2 flame products is found to play a significant role in the iron combustion process.
COMBUSTION AND FLAME
(2024)
Article
Thermodynamics
Jie Yi, Dong-Liang Zhong, Jin Yan, Yi-Yu Lu
Article
Crystallography
Zheng Li, Dong-Liang Zhong, Wei-Yan Zheng, Jin Yan, Yi-Yu Lu, Da-Tong Yi
JOURNAL OF CRYSTAL GROWTH
(2019)
Article
Thermodynamics
Jin Yan, Yi-Yu Lu, Dong-Liang Zhong, Zhen-Lin Zou, Jian-Bo Li
Article
Thermodynamics
Yi-Yu Lu, Bin-Bin Ge, Dong-Liang Zhong
Article
Energy & Fuels
Jian-Bo Li, Dong-Liang Zhong, Jin Yan
JOURNAL OF NATURAL GAS SCIENCE AND ENGINEERING
(2020)
Review
Energy & Fuels
Xi-Yue Li, Bin-Bin Ge, Jin Yan, Yi-Yu Lu, Dong-Liang Zhong, Peter Englezos, Bao-Yong Zhang
Summary: The consumption of natural gas is vital for optimizing China's energy structure towards reduced CO2 emissions. Coalbed methane is recognized as a significant energy resource to supplement conventional fossil fuels. The hydrate-based gas separation technology has shown promise for purifying low-concentration coalbed methane, but challenges remain in achieving milder pressure conditions and enhancing hydrate formation rates. Further research is needed to bridge the gap between gas separation science and technology.
Article
Energy & Fuels
Xiao-Yan Deng, Ying Yang, Dong-Liang Zhong, Xi-Yue Li, Bin-Bin Ge, Jin Yan
Summary: This study investigates the morphology and kinetics of CO2 hydrate formation in the presence of sodium dodecyl sulfate (SDS). It was found that the growth of CO2 hydrate above the gas-liquid interface became stronger with higher SDS concentration, indicating an enhanced promoting effect of SDS on CO2 hydrate formation. The highest efficiency for CO2 hydrate formation was achieved at 1500 and 3000 ppm of SDS, showing potential for improving hydrate-based CO2 capture technology in the future.
Article
Thermodynamics
Feng-Mei Xie, Xi-Yue Li, Dong-Liang Zhong, Peter Englezos, Guo-Xiang Lu
Summary: This study demonstrates the phase behavior of TBPB and CO2 hydrates at different concentrations, with the addition of surfactant affecting phase equilibrium and CO2 consumption during formation. Further research should focus on increasing the CO2 storage capacity of TBPB semiclathrate hydrate.
JOURNAL OF CHEMICAL AND ENGINEERING DATA
(2021)
Article
Engineering, Chemical
Wen-Xin Dai, Xi-Yue Li, Dong-Liang Zhong, Jin Yan, Kai Dong, Xiao-Yan Deng
Summary: This study investigates the use of a fixed bed of activated carbons to capture CO2 at hydrate formation conditions. The results show that an adsorption-hydration hybrid process in wet activated carbons outperforms single adsorption process in dry activated carbons for CO2 capture. The optimal water saturation value for gas consumption is found to be 40%.
CANADIAN JOURNAL OF CHEMICAL ENGINEERING
(2023)
Article
Energy & Fuels
Liang-Meng Wu, Xi-Yue Li, Feng-Mei Xie, Dong-Liang Zhong, Peter Englezos, Jin Yan
Summary: This study presents a review of kinetic studies on the enhancement of hydrate-based CO2 capture using additives, porous media, nanofluids, etc. Future research directions are also discussed. The aim of this review is to aid understanding of the mechanism of the hydrate-based CO2 capture process and provide references for its industrial applications in the near future.
Article
Engineering, Chemical
Bin-Bin Ge, Jin Yan, Dong-Liang Zhong, Yi-Yu Lu, Xi-Yue Li
Summary: CO2 capture was experimentally investigated by forming TBAB semiclathrate in a new system of TBAB + graphite nanofluids. The system of TBAB + graphite nanofluids showed preference for CO2 capture compared to TBAB solution and TBAB + SDS solution. The optimal concentration of 0.2 wt.% graphite nanoparticles was found to enhance hydrate growth in TBAB + graphite nanofluids.
CANADIAN JOURNAL OF CHEMICAL ENGINEERING
(2023)
Article
Energy & Fuels
Kai Dong, Wen-Xin Dai, Dong-Liang Zhong, Jin Yan, Feng-Mei Xie, Han-Sen Sun, Man Wang
Summary: This study investigates the effects of the surfactant cocamidopropyl betaine (CAB) on coal structures and CH4 adsorption characteristics. The results show that the hydrophilicity of coal samples is enhanced after being treated with CAB solutions, increasing the number of hydroxyl functional groups and reducing the amount of adsorbed CH4. Additionally, the pore volume of coal samples increases and the CBM migration rate improves. A concentration of 0.008 mol/L CAB is determined to be the optimal concentration for increasing CBM extraction efficiency.
Article
Engineering, Chemical
Xi-Yue Li, Jin Yan, Dong-Liang Zhong, Shi-Jian Lu, Bin-Bin Ge
Summary: This study investigated the formation of tetra-n-butyl ammonium bromide (TBAB) semiclathrate hydrate for CO2 capture through experiments and in situ Raman spectroscopy. The impacts of TBAB concentration and operating temperature on CO2 incorporation into TBAB semiclathrates were analyzed. The results showed that the structure transition of TBAB semiclathrates from type A to type B occurred in the presence of CO2, resulting in increased CO2 consumption. The TBAB semiclathrate formed at 2.57 mol % TBAB and 282.15 K was found to be a suitable system for CO2 capture.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2023)
Article
Energy & Fuels
Bin-Bin Ge, Dong-Liang Zhong, Yi-Yu Lu, Xi-Yue Li
Summary: The effect of THF concentration on the formation of THF-CH4 hydrate was investigated. It was found that THF concentration is a key factor affecting the growth of hydrates, and increasing THF concentration improves mass transfer. In situ Raman spectroscopy observation showed that CH4 and THF molecules occupy the small and large cavities of the sII hydrate, respectively. Forming two types of hydrates at a low concentration can increase gas storage capacity.
Proceedings Paper
Energy & Fuels
Bin-Bin Ge, Dong-Liang Zhong, Yi-Yu Lu
INNOVATIVE SOLUTIONS FOR ENERGY TRANSITIONS
(2019)