Article
Engineering, Chemical
M. Sherif El-Eskandarany, Naser Ali, Fahad Al-Ajmi, Mohammad Banyan, Ahmed A. Al-Duweesh
Summary: This study explores the effect of different cold rolling stages on the hydrogenation properties of recycled magnesium rods and the impact of subsequent reactive ball milling on the final product. The results show that the gas absorption/desorption kinetics of the materials are improved after cold rolling and ball milling treatment, resulting in a longer cycle life at lower temperatures.
Article
Environmental Sciences
Kanhaiya Chawla, Deepak Kumar Yadav, Abhinav Bajpai, Sushant Kumar, Chhagan Lal
Summary: This study investigates the improvement of hydrogen storage properties of MgH2 by using activated carbon as a catalyst in MgH2-AC nanocomposites. The results show that the presence of activated carbon helps reduce oxygen in MgO phase, leading to significantly enhanced absorption capacity and kinetics in the MgH2-AC nanocomposites. The nanocomposites also exhibit high hydrogenation properties with the presence of beta- and gamma-phases of MgH2, as supported by XRD data.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Chemistry, Physical
Serge Nyallang Nyamsi, Mykhaylo Lototskyy, Volodymyr A. Yartys, Giovanni Capurso, Moegamat Wafeeq Davids, Sivakumar Pasupathi
Summary: MgH2-based hydrogen storage materials, such as the TiH2 and MgH2 graphite-modified composite prepared by HRBM, show high reversible gravimetric H storage capacity, fast hydrogenation/dehydrogenation kinetics, and excellent cycle stability. Through optimal thermal management conditions, a nanocomposite with a maximum hydrogen storage capacity of 6.3 wt% H was successfully prepared and demonstrated good H2 desorption performance.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Biochemistry & Molecular Biology
Mohamed Sherif El-Eskandarany, Naser Ali, Fahad Al-Ajmi, Mohammad Banyan
Summary: This study successfully enhanced the hydrogen storage properties of MgH2 by doping with varying concentrations of ZrC nanopowders. ZrC played a crucial role in reducing the decomposition temperature of MgH2 and improving the kinetics of hydrogenation/dehydrogenation processes, leading to increased efficiency and cycle lifetime of the system.
Article
Chemistry, Physical
Ahmad Ka'ki, Abdulrahman Alraeesi, Amani Al-Othman, Muhammad Tawalbeh
Summary: This study synthesized nanocomposite membranes based on calcium phosphate/ionic liquids with high proton conductivities for high-temperature proton exchange membrane fuel cells. The membranes show promising proton conductivities for applications in high-temperature PEMFCs operated above the boiling point of water.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Thermodynamics
Sepehr Marandi, Niloufar Sarabchi, Mortaza Yari
Summary: A comparative study was conducted to evaluate four combined power producing systems based on low-temperature and high-temperature proton exchange membrane fuel cells. The study analyzed the systems' performance from energy, exergy, and exergoeconomic viewpoints, as well as conducted a parametric analysis to assess the effects of key parameters on the systems' thermodynamic and economic performance. The results showed variations in exergy efficiencies, net output power, and total product unit cost, with different system configurations and operating conditions.
ENERGY CONVERSION AND MANAGEMENT
(2021)
Article
Energy & Fuels
Sara Barati, Mohsen Mehdipourghazi, Mahdi Abdollahi, Khadijeh Hooshyari, Behnam Khoshandam
Summary: By incorporating TiO2 nanoparticles, the high-temperature porous nanocomposite membranes showed increased acid storage ability, leading to enhanced proton conductivity and high performance in fuel cell applications.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2021)
Article
Chemistry, Physical
M. Ahsanul Haque, A. Bakar Sulong, L. Kee Shyuan, E. Herianto Majlan, T. Husaini, R. Emilia Rosli
Summary: The polymer/MWCNT nanocomposites synthesized in this study exhibited higher specific surface areas compared to the pristine MWCNT. The MEAs fabricated using hot pressing method showed a maximum power density of 112.10 mW/cm(2) in a single cell. The synthesized catalyst-supporting materials enhanced electrochemical activity and stability, achieving the main objective of this study.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Chemistry, Physical
C. Dall'Armi, D. Micheli, R. Taccani
Summary: This study analyzed the impact of peak shaving in a hybrid LT-PEMFC/lithium-ion battery power plant for small RoRo car and passenger ferry propulsion, showing that battery peak shaving can significantly reduce FC installed power. Recommendations were made for different types of compressed H2 storage cylinders based on sailing time to avoid excessive reduction in payload.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Engineering, Chemical
K. Sankar, Amiya K. Jana
Summary: In this study, a MIMO sliding mode control scheme combined with low-order nonlinear observers is proposed for integrated control of a PEMFC and a water electrolyzer system. Various observers and models are used to predict and control the system states, and the performance of different control schemes is evaluated through comparison.
CHEMICAL ENGINEERING RESEARCH & DESIGN
(2021)
Article
Thermodynamics
Furkan Kartal, Ugur Ozveren
Summary: This study develops a CFB gasifier/steam turbine/PEM fuel cell integrated system using the Aspen Plus simulator. The impact of different torrefied biomass on PEM fuel cell outputs is examined, and a generalized and rapid prediction model is provided. The ANN model accurately forecasts PEM fuel cell output parameters based on torrefied biomass analysis data and gasification process parameters.
ENERGY CONVERSION AND MANAGEMENT
(2022)
Article
Chemistry, Physical
Amirreza Azad, Iman Fakhari, Pouria Ahmadi, Nader Javani
Summary: This article presents a thermodynamic modeling of a cogeneration system that combines a series two-stage organic Rankine cycle (STORC) and a proton exchange membrane (PEM) fuel cell. The excess heat generated by the fuel cell is utilized in the STORC system. In order to improve the efficiency of the cogeneration system, a thermoelectric generator (TEG) replaces the condenser of the organic Rankine cycle to minimize heat loss. Zeotropic mixtures are employed instead of single working fluids due to their lower irreversibility. The study compares the performance of three zeotropic mixtures with R123, and the results show that Ipentane-cis Butane exhibits better efficiency. Furthermore, a genetic algorithm multi-objective optimization is applied to determine the optimal design parameters of the system. The integration of STORC with the primary PEM fuel cell improves the overall exergy efficiency by 1.9%. The total cost rate for the optimum point depends on the hydrogen production process and can range from 1.36-14.94 ($/h). (c) 2021 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Metallurgy & Metallurgical Engineering
Shaoyang Shen, Liuzhang Ouyang, Jiangwen Liu, Hui Wang, Xu-Sheng Yang, Min Zhu
Summary: A one-step high-energy ball milling process is used to in situ form ultrafine Ni nanoparticles and combine them with expanded graphite to synthesize a MgH2Ni-EG nanocomposite. The nanocomposite exhibits excellent hydrogen storage performance at both high and room temperatures.
JOURNAL OF MAGNESIUM AND ALLOYS
(2023)
Article
Engineering, Multidisciplinary
Mohamed Houcine Dhaou, Sofiene Mellouli, Faisal Alresheedi, Yassine El-Ghoul
Summary: In this study, the performance of a Solar Water Tank (SWT) integrated with Nano-enhanced Phase Change Material (Ne-PCM) and a Stirrer was experimentally assessed. Two configurations of SWT/Ne-PCMs, a spiral-type and a jacketed shell-type heat exchangers, were designed and developed. The experimental results showed that the completion time for the SWT/Ne-PCM charging and discharging processes was reduced by 12.5% and 23.51% respectively, when a stirrer and a coil were used.
ALEXANDRIA ENGINEERING JOURNAL
(2022)
Article
Chemistry, Physical
Kaaviah Manoharan, Rajashabala Sundaram, Kannan Raman
Summary: Our environment is deteriorating due to modernization and industrialization, leading to serious issues. Hydrogen energy is seen as a green and sustainable alternative. This study focuses on the effective storage of hydrogen using a nanocomposite of metal hydride (MgH2), natural clay nanotube (A-HNT), and conductive polymer (PANI). The prepared nanocomposite shows improved hydrogen storage capacity and electrochemical activity, making it a potential medium for renewable energy storage.
Article
Chemistry, Physical
Naser Ali, Joao A. Teixeira, Abdulmajid Addali, Feras Al-Zubi, Ehab Shaban, Ismail Behbehani
APPLIED SURFACE SCIENCE
(2018)
Article
Materials Science, Multidisciplinary
M. Sherif El-Eskandarany, H. Al-Matrouk, Montaha Behbehani, Ehab Shaban, Abdullah Alkandary, Fahad Aldakheel, M. Al-Saidi
MATERIALS CHEMISTRY AND PHYSICS
(2018)
Article
Green & Sustainable Science & Technology
F. Aldakheel, M. S. Ismail, K. J. Hughes, D. B. Ingham, L. Ma, M. Pourkashanian, D. Cumming, R. Smith
Article
Chemistry, Physical
F. Aldakheel, M. S. Ismail, K. J. Hughes, D. B. Ingham, L. Ma, M. Pourkashanian
Summary: The compressibility, gas permeability, and thermal stability of various GDLs were investigated, showing that GDLs with Teflon gaskets were more impacted and that bare carbon substrates lost up to 40% of PTFE material compared to MPL-coated GDLs.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Nanoscience & Nanotechnology
Lei Jin, Ehab Shaaban, Scott Bamonte, Daniel Cintron, Seth Shuster, Lei Zhang, Gonghu Li, Jie He
Summary: Photocatalytic reduction of CO2 to valuable chemical fuels is of broad interest due to its potential to activate greenhouse gases using renewable energy input. The choice of metal cocatalysts and surface basicity of TiO2 can enhance the photocatalytic efficiency for CO2 photoreduction, with different metals showing varying activity and selectivity for CO and hydrocarbon production. The improvement of electron density and low proton affinity of metal cocatalysts play a key role in CO2 photoreduction.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Chemistry, Multidisciplinary
Ehab Shaaban, Gonghu Li
Summary: The study reveals the adsorption and reaction process of CO molecules on metal/metal oxide catalysts, providing new insights into the functional active sites in CO2 and CO reduction reactions.
COMMUNICATIONS CHEMISTRY
(2022)
Article
Chemistry, Multidisciplinary
Mohamed Sherif El-Eskandarany, Abdullah Alkandary, Fahad Aldakheel, Mariam Al-Saidi, Fahad Al-Ajmi, Mohammad Banyan
Proceedings Paper
Materials Science, Multidisciplinary
M. Sherif El-Eskandarany, Ehab Shaban, A. Alkandary
MATERIALS TODAY-PROCEEDINGS
(2018)
Proceedings Paper
Materials Science, Multidisciplinary
Feras G. Alzubi, Abdullah Alkandary
MATERIALS TODAY-PROCEEDINGS
(2018)
Article
Chemistry, Physical
M. Sherif El-Eskandarany, Ehab Shaban, Hasan Al-Matrouk, Montaha Behbehani, Abdullah Alkandary, Fahad Aldakheel, Naser Ali, S. A. Ahmed
MATERIALS TODAY ENERGY
(2017)