Article
Chemistry, Physical
Uday Raj Singh, Satyasekhar Bhogilla
Summary: This study presents a comparative analysis of the performance of metal hydride hydrogen storage units using LaNi5 and compacts of LaNi5 incorporated with expanded natural graphite (ENG). The research highlights the need to enhance thermal conductivity to improve heat transfer during hydrogen absorption. The results demonstrate that the use of LaNi5 and ENG compacts significantly improves heat transfer, hydrogen storage capacity, and reduces absorption time.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Thermodynamics
Dong-min Kim, Joong Kim, Jungchul Lee, Bong Jae Lee
Summary: The effective thermal conductivity of LaNi5 powder packed bed was analyzed using a miniaturized guarded hot-plate apparatus in this study. Calibration experiment and uncertainty analysis were conducted to validate the accuracy of the apparatus. The study estimated the effect of particle size on the contact factor of the packed bed and analyzed the impact of contact factor and gas thermal conductivity on the characteristic length of the gas film using the Yagi and Kunii model.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2021)
Article
Chemistry, Physical
Gamze Atalmis, Mehmet Demiralp, Nebi Yelegen, Yuksel Kaplan
Summary: This study investigates the process parameters that affect the improvement of hydrogen storage material properties. The thermal conductivity of the storage materials has been improved to accelerate the hydrogen charge/discharge processes and obtain the required hydrogen at desired flow rates in a short time. The experimental results show that coating the storage material with copper increases heat transfer, reduces the hydrogen charging time, and improves stable discharge time in the metal hydride reactor.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Chemistry, Physical
Gabriel Rodrigues de Almeida Neto, Cesar Augusto Goncalves Beatrice, Daniel Rodrigo Leiva, Luiz Antonio Pessan
Summary: This study investigated the preparation of PEI-LaNi5 composite films for hydrogen storage, demonstrating that PEI films filled with LaNi5 are promising materials for this purpose. The membranes were successfully produced through solvent casting assisted by an ultrasonic bath, and the results showed that the film morphology remained unchanged after hydrogenation cycles.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Chemistry, Physical
Hongen Yu, Yong Wu, Shunpeng Chen, Zewei Xie, Yiman Wu, Nuo Cheng, Xue Yang, Wei Lin, Lei Xie, Xingguo Li, Jie Zheng
Summary: In this study, a palladium catalyst loaded on a hydrogen storage support-Pd/LaNi5 was synthesized and its catalytic property in reversible hydrogen storage of N-ethylcarbazole (NEC) was investigated. The results showed that the catalytic performance of 1 wt%Pd/LaNi5 was significantly better than that of Pd/Al2O3 with the same Pd loading. This improvement was attributed to the ample lattice hydrogen bonding sites and fast bulk hydrogen diffusion kinetics of LaNi5.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2022)
Article
Chemistry, Physical
Yi Yang, Xiaofeng Mou, Zezhi Zhu, Zewei Bao
Summary: In this study, an ETC measurement cell based on the steady-state radial heat flow method was fabricated and its reliability was confirmed. The experimental results show that the ETC of activated LaNi5 powder is lower than that of unactuated material, and it increases with pressure and thermal conductivity of filling gas. The effects of hydrogen absorption and desorption on ETC depend on hydrogen concentration and expansion/constriction of MH particles.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Chemistry, Physical
Busra Arslan, Mustafa Ilbas, Selahattin Celik
Summary: Energy storage, especially thermal energy storage using phase change materials (PCMs), is crucial for efficient energy utilization. This study investigates the use of PCM in a metal hydride (MH) reactor to store and recover heat during hydrogen charge and discharge processes. Experiments were conducted on a LaNi5-H2 reactor with and without PCM, and the effects of hydrogen storage pressure and reactor design on the charge-discharge rate were determined. The results show that designing a hybrid MH-PCM storage system holds promise for the advancement of hydrogen storage and transportation technologies, particularly in vehicles like automobiles and submarines.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Chemistry, Physical
Long Liang, Qingqing Yang, Shaolei Zhao, Limin Wang, Fei Liang
Summary: Rare-earth hydrogen storage alloy shows a catalytic effect in reducing the dehydrogenation temperature and improving the dehydrogenation kinetics of alane, providing a promising strategy for metal hydride modification.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Chemistry, Physical
Xiao-Shuai Bai, Wei-Wei Yang, Yong-Jian Yang, Kai-Ran Zhang, Fu-Sheng Yang
Summary: This study investigates the use of gradient porosity metal foam in a metal hydride (MH) reactor to enhance heat transportation and improve hydrogen absorption performance. The results show that the optimized GMF reactor exhibits higher hydrogenation performance compared to a uniform metal foam reactor. The study also proposes a new indicator, comprehensive hydrogen storage performance (CHSP), which takes into account various factors such as hydrogen storage rate, capacity, and density. Additionally, the hydrogenation performance of the optimized GMF reactor improves with increasing metal foam layers and follows a specific power exponent trend.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Chemistry, Physical
K. Malleswararao, N. Aswin, Pramod Kumar, Pradip Dutta, S. Srinivasa Murthy
Summary: This paper investigates the application of metal hydrides in thermal energy storage and hydrogen storage. A low temperature hydride, La0.75Ce0.25Ni5, is experimentally studied for its hydrogen storage capacity and thermal energy storage capacity. The heat and mass transfer characteristics of a novel reactor design are also investigated.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Chemistry, Physical
K. Malleswararao, Pramod Kumar, Pradip Dutta, S. Srinivasa Murthy
Summary: This study investigates the hydrogen storage characteristics and thermal storage performance of LaNi4.25Al0.75 alloy in the temperature range of 150°C-200°C. The alloy exhibits a hydrogen storage capacity of 1.20 wt% and can store a total thermal energy of 285.7 kJ.kg-1 and deliver heat at an average rate of 287.5 W.kg-1 with an efficiency of 64.1%.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Thermodynamics
Xiao-Shuai Bai, Wei-Wei Yang, Xin-Yuan Tang, Zhou-Qiao Dai, Fu-Sheng Yang
Summary: This study investigates the coupled fin-metal foam metal hydride reactor using a 3D multi-physical model. The results show that the fin-metal foam reactor has lower thermal resistance and improved charging time and hydrogen absorption performance.
Article
Chemistry, Physical
Terry D. Humphries, Mark Paskevicius, Ali Alamri, Craig E. Buckley
Summary: Thermal batteries are efficient for storing renewable energies, utilizing reversible thermochemical reactions to drive a heat engine. Studies on the SrH2-2Al system have shown promising properties for high efficiency operation, which could enhance technological applications.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Energy & Fuels
Zbigniew Lodziana
Summary: Hydrogen in solid state compounds is considered a safe method of energy storage, but the ultimate materials for this purpose remain unknown. Theoretical investigations based on quantum mechanics have a well-established position, but their application for design of new alloys for reversible hydrogen storage is rare. Mainstream research focuses on predicting thermodynamic and structural properties of hydrides, while kinetic effects related to hydrogen transport present challenges that cannot be easily automated.
FRONTIERS IN ENERGY RESEARCH
(2021)
Article
Green & Sustainable Science & Technology
Min Liu, Bo Zhao, Yaze Li, Zhen Wang, Xuesong Zhang, Liang Tong, Tianqi Yang, Xuefang Li, Jinsheng Xiao
Summary: This study investigated the effects of fin structure and injection tube on the performance of a hydrogen storage tank packed with LaNi5 alloy. A parametric study was conducted to optimize the tank design and improve its efficiency and safety. The results showed that the fin structure improved heat transfer performance and the injection tube enhanced hydrogen mass transfer in the tank.
Article
Chemistry, Physical
Masahiro Matsushita, Masanori Monde, Yuichi Mitsutake
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2013)
Article
Engineering, Mechanical
Shu Fujimoto, Yoji Okita, Yoshitaka Fukuyama, Takashi Yamane, Fujio Mimura, Masahiro Matsushita, Toyoaki Yoshida
JOURNAL OF TURBOMACHINERY-TRANSACTIONS OF THE ASME
(2010)
Article
Chemistry, Physical
Masahiro Matsushita, Ikko Tajima, Masatake Abe, Hideki Tokuyama
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2019)