Article
Energy & Fuels
Pavel B. Kurmashov, Alexander G. Bannov, Maxim Popov, Andrey E. Brester, Arina Ukhina, Arkady Ishchenko, Evgenii A. Maksimovskii, Lyudmila Tolstobrova, Arsenii O. Chulkov, Gennady G. Kuvshinov
Summary: The catalyst for decomposing methane to carbon nanofibers and hydrogen was successfully prepared using the solution combustion technique. The dynamics of temperature change during the redox reaction process of catalyst synthesis was experimentally determined. Testing of the catalyst showed that under optimal conditions of temperature and pressure, high specific yield of hydrogen could be achieved.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2022)
Review
Energy & Fuels
Arnoldus Lambertus Dipu
Summary: Hydrogen has the potential to replace fossil fuels in various environments, with Ni-based catalysts showing high activity for catalytic methane decomposition. Consideration should be given to reactor design and regeneration techniques for industrial applications of CMD.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2021)
Article
Chemistry, Physical
Tom A. J. Welling, Suzan E. Schoemaker, Krijn P. de Jong, Petra E. de Jongh
Summary: Gas-cell transmission electron microscopy has enabled direct, nanoscale imaging of catalysts during reaction. We compared the growth rates of carbon nanofibers measured gravimetrically in a reactor and observed through electron microscopy, and found good agreement. This allowed for detailed insight into the contribution of individual catalyst nanoparticles in these heterogeneous catalysts to overall carbon growth. The methodology of nanoscale in situ observations paves the way for understanding macroscopic rates of catalyzed reactions.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Green & Sustainable Science & Technology
Luis Alves, Vitor Pereira, Tiago Lagarteira, Adelio Mendes
Summary: The decarbonization of the energy sector to avoid irreversible global warming is critical. Hydrogen is seen as a suitable alternative to fossil fuels, with catalytic methane decomposition showing potential for CO2-free hydrogen production. However, challenges related to catalyst deactivation due to carbon clogging have hindered the industrialization of this process.
RENEWABLE & SUSTAINABLE ENERGY REVIEWS
(2021)
Review
Chemistry, Multidisciplinary
Ahmed Gamal, Kamel Eid, Muftah H. El-Naas, Dharmesh Kumar, Anand Kumar
Summary: Catalytic methane decomposition is a promising method for producing hydrogen and carbon nanostructures, with research focusing on metal-based and carbon-based catalysts. The recent expansion of studies highlights the importance of catalyst shape and composition on CMD activity and stability.
Article
Energy & Fuels
Guohui Xuan, Fang Liu, Fan Zhang, Yiling Hu, Jinhan Miao, Li Yang
Summary: This study improves catalyst stability by adding a trace amount of H2S in direct methane decomposition, leading to increased methane conversion and delayed deactivation time. H2S changes the carbon deposition morphology of the catalyst, promoting methane molecule adsorption on the catalyst surface.
Article
Energy & Fuels
Shun Zhao, Yun Zhang, Yunfei Wu, Lijun Zhang, Haoquan Hu, Lijun Jin
Summary: Catalytic methane decomposition (CMD) is a promising route for H2 production. In this study, MOF-derived hierarchical carbon catalysts were prepared and their catalytic performances were investigated. The results showed that by adjusting the carbonization temperature and carbon source, the morphology and pore structure of the derived carbon materials can be improved, leading to enhanced catalytic performance. Increasing the reaction temperature also significantly enhanced the catalytic performance.
JOURNAL OF THE ENERGY INSTITUTE
(2022)
Article
Biochemistry & Molecular Biology
Feng Ye, Shuanshi Fan, Wenjun Li, Yanhong Wang, Xuemei Lang, Jianli Zhang, Jing Li, Gang Li
Summary: Methane dehydroaromatization (MDA) is an alternative method for producing aromatics and hydrogen, which has attracted significant attention due to the abundance of natural gas resources and the demand for aromatics and COx-free hydrogen. In this study, a simulation of MDA in membrane reactors (MRs) was conducted to achieve highly efficient co-production of aromatics and COx-free hydrogen. The results showed that catalytic activity, membrane flux and selectivity, and operating conditions have significant impacts on the performance of MRs in terms of methane conversion, hydrogen yield, and hydrogen purity.
Article
Energy & Fuels
Saba Kazemi, Seyed Mehdi Alavi, Mehran Rezaei, Ehsan Akbari
Summary: This research focuses on the design and development of catalytic systems using metal oxides (CuO, Cr2O3, Co3O4, ZnO, and MnO2) promoted NiO/FeAl2O4 catalysts for the thermocatalytic decomposition of CH4. The most active and stable catalyst was found to be the MnO2(10)-NiO(50)/FeAl2O4 catalyst, which exhibited a CH4 conversion of 62.3% and an H2 yield of 66% at 700 degrees C. The catalytic efficiency and carbon production rate increased with an increase in MnO2 content from 5 to 10 wt%, but decreased when the MnO2 loading was further increased to 15 wt%. Additionally, the catalyst calcined at 600 degrees C showed the highest efficiency, while increasing the GHSV value and CH4:N2 molar ratio, as well as the reduction temperature, resulted in decreased catalytic activity and stability.
Article
Multidisciplinary Sciences
Supanida Saconsint, Nonthicha Sae-tang, Atthapon Srifa, Wanida Koo-Amornpattana, Suttichai Assabumrungrat, Choji Fukuhara, Sakhon Ratchahat
Summary: In this study, a suitable catalyst for the simultaneous production of hydrogen-rich syngas and multi-walled carbon nanotubes was investigated. The NiMo/MgO catalyst exhibited excellent catalytic performance, achieving high conversions of CH4 and CO2 as well as producing high-quality syngas. Additionally, the use of NiMo/MgO catalyst resulted in the formation of well-aligned and high-purity CNTs, while the use of trimetallic catalysts led to deactivation.
SCIENTIFIC REPORTS
(2022)
Article
Engineering, Environmental
Ahmed E. Awadallah, M. A. Deyab, Hanan A. Ahmed
Summary: In this study, a series of Mo/MgO catalysts were prepared, and it was found that the 30%Mo and 40%Mo/MgO catalysts exhibited higher activity and stability in methane conversion reaction and produced multi-walled carbon nanotubes bundles with uniform diameters. The presence of highly dispersed and stabilized Mo nanoparticles in the MgMoO4 matrix played a primary role in achieving high activity, particularly stability, and growth of the multi-walled carbon nanotubes bundles.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Thermodynamics
Alan Maslani, Michal Hlina, Milan Hrabovsky, Petr Krenek, Vineet Singh Sikarwar, Jafar Fathi, Sumathy Raman, Siarhei Skoblia, Ondrej Jankovsky, Adela Jierickova, Shelja Sharma, Tomas Mates, Radek Musalek, Frantisek Lukac, Michal Jeremias
Summary: The pyrolysis of simulated natural gas (NG) was studied experimentally, and it was found that the composition of NG affects the effectiveness and energy requirement of the pyrolysis process.
ENERGY CONVERSION AND MANAGEMENT
(2023)
Article
Chemistry, Applied
Saba Kazemi, Seyed Mehdi Alavi, Mehran Rezaei
Summary: A new type of spinel powder was used as a support for nickel-based catalysts in the thermal decomposition of methane to produce COx-free hydrogen. Various techniques were used to analyze the physicochemical characteristics of the samples. The results showed that the FeAl2O4-supported nickel catalyst had the highest stability and efficiency.
FUEL PROCESSING TECHNOLOGY
(2023)
Article
Biochemistry & Molecular Biology
Qiangu Yan, Timothy Ketelboeter, Zhiyong Cai
Summary: Nickel-lignin nanocomposites were synthesized and graphitized to few-layer graphene-encapsulated nickel nanoparticles (Ni@G), which showed high catalytic activity and stability in the catalytic decomposition of methane. The cracked graphene shells and exposed nickel nanoparticles played important roles in the methane decomposition reaction, with the vacancy defects and edges of the cracked graphene shells serving as active sites.
Article
Energy & Fuels
Shahla Karimi, Fereshteh Meshkani, Mehran Rezaei, Ali Rastegarpanah
Summary: Supported Ni catalysts on magnesium silicate were synthesized via co-precipitation using urea. Factors such as urea decomposition time, concentration, calcination temperature, and surfactant type significantly influenced the surface properties and catalytic performance. Optimal performance was observed at urea decomposition time of 24 h, urea concentration of 0.5 M, and calcination temperature of 700 degrees C for the Ni/SiO2 dot MgO catalyst with good thermal stability and decreased surface area.
Article
Thermodynamics
Ali Pakari, Saud Ghani
INTERNATIONAL JOURNAL OF REFRIGERATION-REVUE INTERNATIONALE DU FROID
(2019)
Article
Energy & Fuels
Ali Pakari, Saud Ghani
Article
Thermodynamics
Saud Ghani, Esmail Mohamed Ali Ahmed El-Bialy, Foteini Bakochristou, Mohammed Mohamed Rashwan, Ayman Mohamed Abdelhalim, Salman Mohammad Ismail, Pratheesh Ben
SCIENCE AND TECHNOLOGY FOR THE BUILT ENVIRONMENT
(2020)
Article
Construction & Building Technology
Ahmed Osama Mahgoub, Saud Ghani, Mohammed M. Rashwan, Salman M. Ismail, Esmail A. ElBialy
BUILDING AND ENVIRONMENT
(2020)
Article
Construction & Building Technology
Ahmed Osama Mahgoub, Samer Gowid, Saud Ghani
SUSTAINABLE CITIES AND SOCIETY
(2020)
Article
Thermodynamics
Ali Pakari, Saud Ghani
Summary: High energy consumption and increasing energy costs have driven investment in energy efficiency. Earth-to-air heat exchangers offer an environmentally friendly cooling technique that is affected by factors such as airflow rate, tube length, wall thickness, and soil thermal conductivity.
INTERNATIONAL JOURNAL OF REFRIGERATION
(2021)
Article
Energy & Fuels
Ahmad K. Sleiti, Samer F. Ahmed, Saud A. Ghani
Summary: The role of HVAC systems in spreading viruses is complex and requires further research. Existing strategies for health buildings may not be easily applicable to other building types due to high energy costs. More experimental studies are needed to understand various scenarios of virus transmission.
JOURNAL OF ENERGY RESOURCES TECHNOLOGY-TRANSACTIONS OF THE ASME
(2021)
Article
Construction & Building Technology
Ahmed Osama Mahgoub, Saud Ghani
Summary: This research examines the use of CFD porous media model to study perforated windbreaks through experiments and numerical simulation. By conducting experiments and analyzing simulations on windbreaks of different porosity ratios, a correlation between windbreak porosity and the coefficients needed for the CFD model was determined. A comparison between experimental and simulated results revealed an average error of approximately 10.5% for velocity and 12% for pressure drop values obtained from the porous media model, as compared to the exact geometry CFD results.
SUSTAINABLE CITIES AND SOCIETY
(2021)
Article
Construction & Building Technology
Elvire Katramiz, Nesreen Ghaddar, Kamel Ghali, Douaa Al-Assaad, Saud Ghani
Summary: The study found that infected individuals using lower PV flow rates in tandem seating and higher flow rates in face-to-face seating can achieve minimal exposure levels in an office setting. Additionally, the average inhaled intake fraction was 31% lower for face-to-face seating during coughing and 86% lower during breathing compared to tandem seating.
BUILDING AND ENVIRONMENT
(2021)
Article
Construction & Building Technology
Douaa Al Assaad, Kamel Ghali, Nesreen Ghaddar, Elvire Katramiz, Saud Ghani
Summary: The study investigated the impact of personalized ventilation systems on reducing inhalation exposure to indoor particles and clothing contamination by particle deposition. Results demonstrated that different ventilation devices at varying flow rates had different effects on exposure and deposition.
BUILDING AND ENVIRONMENT
(2021)
Article
Materials Science, Multidisciplinary
Yousif Badri, Thaer Syam, Sadok Sassi, Mohammed Hussein, Jamil Renno, Saud Ghani
Summary: CFD analysis was conducted on a mono-tube vehicle MRF damper with fluid MRF-132DG, showing a 70% increase in viscosity values with elevated magnetic field excitation current. The results of CFD simulation were compared to experiments, demonstrating good match and validating the accuracy of the analysis.
MATERIALS RESEARCH EXPRESS
(2021)
Article
Agriculture, Multidisciplinary
Ali Pakari, Saud Ghani
Summary: Proper ventilation is crucial in dairy cow barns to avoid heat stress. The study compared three ventilation systems using CFD simulations, with barn C showing the best airflow performance. It was found that fans on the inlet and exhaust ends (barn C) are necessary for sufficient and uniform airflow, while a combination of inlet end fans and sidewall inlet fans (barn A) is not recommended as they work against each other.
COMPUTERS AND ELECTRONICS IN AGRICULTURE
(2021)
Article
Construction & Building Technology
Saud Ghani, Ahmed Osama Mahgoub, Foteini Bakochristou, Esmail A. ElBialy
Summary: This study compared the suitability of seven different thermal comfort indices for assessing outdoor thermal comfort in hot and arid environments, with the WBGT index deemed the most suitable.
JOURNAL OF BUILDING ENGINEERING
(2021)
Article
Energy & Fuels
Abdelrahman M. Awad, Ibnelwaleed A. Hussein, Mustafa S. Nasser, Saud A. Ghani, Ahmed O. Mahgoub
Summary: The study found that the rotation speed of the drill pipe has a dominant effect on cuttings transportation performance, particularly in highly deviated and horizontal wells. Inadequate hole cleaning may occur in vertical wellbore sections where drill-pipe rotation cannot fully control the process. Eccentric pipes result in higher cuttings volume concentrations due to reduced fluid velocity in the narrow gap of the eccentric annulus.
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2022)
Article
Computer Science, Information Systems
Mayar Haggag, Samaa Abdelhay, Asma Mecheter, Samer Gowid, Farayi Musharavati, Saud Ghani
