Article
Environmental Studies
Vetrivel Kumar Kandasamy, Arunkumar Munimathan, Silambarasan Rajendran, Ratchagaraja Dhairiyasamy
Summary: Syngas produced from glycerol using nickel-based catalysts with different support materials was tested in a compression ignition engine. The results showed that the nickel-lanthanum catalyst had the highest syngas and hydrogen yield, and performed well in the engine, reducing emissions and improving performance.
ENERGY & ENVIRONMENT
(2023)
Article
Chemistry, Physical
Paolo Sementa, Jacson Beltrao de Vargas Antolini, Cinzia Tornatore, Francesco Catapano, Bianca Maria Vaglieco, Jose Javier Lopez Sanchez
Summary: This study investigates the performance and emissions of a single-cylinder SI engine operating under lean-burn hydrogen combustion and compares it to methane under similar conditions. The results show that hydrogen combustion achieves stable combustion with lower pollutant emissions and higher efficiency, making it a promising clean fuel to replace conventional fuels.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Chemistry, Physical
Shiyi Pan, Jinhua Wang, Zuohua Huang
Summary: This study compared the effects of four different hydrogen injection strategies on the distribution, combustion, and emissions of hydrogen mixtures. The results showed that different hydrogen injection strategies resulted in different types of hydrogen mixture distribution. Adjusting the hydrogen injection strategy can optimize the engine's combustion and emission performance.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Chemistry, Physical
Attili Ramkiran, Dai-Viet N. Vo, Mohd Sabri Mahmud
Summary: This study reported the production of syngas from dry reforming of ethanol using LaCuO3 and CeCuO3 catalysts, with LaCuO3 showing superior performance due to its relatively low reduction temperature, high surface area and crystallinity, and many active sites.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Multidisciplinary Sciences
Bartosz Hrycak, J. Mizeraczyk, D. Czylkowski, M. Dors, M. Budnarowska, M. Jasinski
Summary: This paper presents a microwave plasma-based technology for efficient hydrogen production from synthetic biogas. The experiment demonstrated that the waveguide-supplied metal cylinder-based microwave plasma source (MPS) could carry out the steam reforming of synthetic biogas without soot formation and microwave discharge extinction. It also introduced a new parameter, energy-CH4 feedstock consumption yield, to describe the MPS performance.
SCIENTIFIC REPORTS
(2023)
Article
Thermodynamics
Zhen Xu, Ming Jia, Xudong Miao, Huiquan Duan, Shanglin Xu, Liming Du
Summary: A single-fuel dimethyl ether reactivity-controlled compression ignition engine system with on-board reforming was studied. Computational investigations were conducted to analyze the reforming process and the engine performance. The results showed that earlier exhaust valve opening timing and more reformer units were beneficial for reforming and energy recovery. The introduction of the reforming system improved the system thermal efficiency by 0.52% to 1.44%.
ENERGY CONVERSION AND MANAGEMENT
(2022)
Article
Materials Science, Multidisciplinary
Fahim Fayaz, Chao He, Avishek Goel, Jukka Rintala, Jukka Konttinen
Summary: Oxidative ethanol dry reforming using 10%Co/Al2O3 catalyst is a promising method to produce high-quality syngas, which can be upgraded to liquid biofuels and chemicals. Increasing the reaction temperature improves the conversion of ethanol and CO2, and yields higher amounts of H2 and CO.
MATERIALS TODAY COMMUNICATIONS
(2023)
Article
Chemistry, Physical
Georgios Bampos, Sotirios Karaiskos, Theodora Ramantani, Sotirios Tsatsos, Georgios Kyriakou
Summary: This study investigates the steam reforming of butanol - ethanol mixtures for H2 production over Ru-based catalysts. Two different catalysts, 5 wt% Ru/Al2O3 and 5 wt% Ru/MgO-Al2O3, were synthesized and characterized. Catalytic activity tests showed that both catalysts achieved approximately 100% conversion of ButOH and EtOH to H2 at 700 degrees C, with Ru/Al2O3 outperforming Ru/MgO-Al2O3 due to higher Ru metal dispersion. The presence of MgO suppressed H2 selectivity in favor of hydrocarbon reaction intermediates production. After 45 hours of exposure to the reaction mixture, Ru/Al2O3 showed remarkable stability at 700 degrees C. This work suggests that Ru-based catalysts may be superior to Pt-based catalysts in steam reforming processes involving alcohol mixtures for H2 production.
APPLIED CATALYSIS A-GENERAL
(2023)
Article
Chemistry, Physical
Kabbir Ali, Riffat Amna, Mohamed I. Hassan Ali, Tiebebe Tsefaye, Kiseong Kim
Summary: This computational study examines the influence of equivalence ratio and hydrogen volume fraction on the ultra-lean burning process of syngas-fueled homogeneous charge compression ignition (HCCI) engine. The results indicate that changing the equivalence ratio has a negligible impact on combustion phasing but positively affects combustion and thermal efficiency. Additionally, a high volume fraction of H2 improves the combustion performance but slightly increases NOx emissions.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Energy & Fuels
Amir Mosayebi
Summary: A mechanistic kinetic model for ethanol dry reforming (EDR) process was derived through Langmuir-Hinshelwood (LH) isotherm, achieving high ethanol conversion and H-2 yield on a Ni-Cu/La2O3 catalyst.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2022)
Article
Energy & Fuels
Ali Diane, Gounkaou Woro Yomi, Sidiki Zongo, Tizane Daho, Herve Jeanmart
Summary: Gas from a small biomass gasification unit can be used as the main fuel in a dual-fuel engine for decentralized power generation in West Africa. Combustion analysis of the LPGN2 mixture in the engine showed similar overall behavior to diesel, with lower pressure peaks in dual-fuel mode. However, the engine exhibited longer ignition delay and diffusive combustion phase, resulting in lower indicated mean effective pressure and fuel efficiency. Dual-fuel operation also increased the coefficient of variation (COVIMEP) and led to higher CO emissions, slight reduction in CO2, and substantial decrease in nitrogen oxides compared to neat diesel.
Article
Thermodynamics
Zengqiang Zhu, Haoming Gu, Zan Zhu, Yanju Wei, Ke Zeng, Shenghua Liu
Summary: This paper discusses the importance of heavy-duty natural gas spark ignition engines and the impact of methanol mixture preparation and flow. The study found that an optimized injection strategy can promote mixture homogeneity and improve engine braking thermal efficiency.
APPLIED THERMAL ENGINEERING
(2021)
Article
Chemistry, Physical
Ting Li, Yuhao Tian, Xiaoli Yan, Weijie Cai
Summary: Designing high-performance catalysts is of great significance for the conversion of CO2 and bio-ethanol into high value-added syngas. In this study, a Ni-based catalyst with a core@shell structure was found to exhibit higher activity and better stability compared to a Cu-based catalyst. This work provides valuable information for addressing coke formation and metal sintering issues in reforming processes.
Article
Energy & Fuels
Idris Aminu, Mohamad A. Nahil, Paul T. Williams
Summary: A two-stage pyrolysis-nonthermal plasma/catalytic steam reforming reactor system was used to produce hydrogen from waste high-density polyethylene. Different catalyst support materials have different effects on the generation of plasma, and MCM-41 shows the highest gas yield and hydrogen yield.
Article
Energy & Fuels
Hanmin Yang, Yuxiao Cui, Tong Han, Linda Sandstrom, Par Jonsson, Weihong Yang
Summary: A novel pyrolysis followed by in-line cascaded catalytic reforming process was developed to produce high-purity syngas from woody biomass without additional steam. This process utilizes biochar and NiAl2O4 catalysts to promote cracking of large oxygenates and reforming of small molecules, resulting in high syngas yield and gas energy conversion efficiency. The sequential promotion in separated catalyst layers maximizes syngas production and improves the activity and stability of the Ni-based catalyst.
Article
Thermodynamics
Yuanshen Lu, Zhiqiang Guan, Hal Gurgenci, Abdullah Alkhedhair, Suoying He
APPLIED THERMAL ENGINEERING
(2016)
Article
Thermodynamics
Abdullah Alkhedhair, Ingo Jahn, Hal Gurgenci, Zhiqiang Guan, Suoying He, Yuanshen Lu
APPLIED THERMAL ENGINEERING
(2016)
Article
Thermodynamics
Yubiao Sun, Abdullah M. Alkhedhair, Zhiqiang Guan, Kamel Hooman
Article
Environmental Sciences
A. M. Aldawsari, I. H. Alsohaimi, H. M. A. Hassan, A. J. Al-Abduly, I Hassan, E. A. M. Saleh
Summary: This study successfully synthesized a silicone hybrid polyurea-based polymer via in situ polymerization and utilized it as an adsorbent for heavy metal wastewater treatment. The results showed that SiHPUP exhibited good adsorption for Cr(III) and Pd(II), with minimal loss after multiple cycles, providing a promising solution for heavy metal wastewater purification.
INTERNATIONAL JOURNAL OF ENVIRONMENTAL SCIENCE AND TECHNOLOGY
(2022)
Article
Chemistry, Physical
Abdullah J. Al-Abduly, Ahmed A. Basfar, Mohammed S. Algamdi, Ibrahim H. Alsohaimi, Ahmed A. Alharbi, Abdullah M. Alkhedhair
Summary: This study investigated the treatment of water samples contaminated with 2,4,6-trichlorophenol (TCP) by gamma radiation and ozonation, demonstrating the effective removal and detoxification of TCP under specific conditions.
RADIATION PHYSICS AND CHEMISTRY
(2021)
Article
Energy & Fuels
Ahmed A. Alharbi, Naif B. Alqahtani, Abdullah M. Alkhedhair, Abdullah J. Alabduly, Ahmad A. Almaleki, Mustafa H. Almadih, Miqad S. Albishi, Abdullah A. Almayeef
Summary: Feeding internal combustion engines with hydrogen-rich syngas as an admixture to hydrocarbon fuels can reduce pollutant emissions, especially NOx. This study investigates the effect of plasma torch assembly design on gasoline reforming and explores the erosion resistance of cathode-emitting materials.
Article
Engineering, Chemical
Bader A. Alfarraj, Ahmed A. Al-Harbi, Saud A. Binjuwair, Abdullah Alkhedhair
Summary: This study compared the traditional and modified Bunsen burners for the Saudi LPG/air mixture, identifying operation problems and successfully overcoming them. The researchers also applied a MATLAB algorithm for flame image processing and measuring laminar burning velocity, obtaining significant results.
JOURNAL OF COMBUSTION
(2022)
Article
Thermodynamics
Suoying He, Yang Li, Mingwei Wang, Aiping Wang, Abdullah M. Alkhedhair, Hongjun Guan, Xuehong Wu, Yuetao Shi, Ming Gao
Summary: This study investigates the control mechanism of a spray pre-cooling system for performance improvement of natural draft dry cooling towers. It develops a 3-D model to simulate a 120 m high tower and explores the effects of spray angles, nozzle arrangement, and water flowrates. The findings suggest optimized schemes for maximal cooling performance improvement with minimal water consumption, as well as recommendations for achieving uniform cooling.
APPLIED THERMAL ENGINEERING
(2022)
Article
Physics, Fluids & Plasmas
Abdullah Al-Abduly, Paul Christensen, Adam Harvey
PLASMA SOURCES SCIENCE & TECHNOLOGY
(2020)
Article
Engineering, Multidisciplinary
Ahmed A. Al-Harbi, Feraih Sh Alenazey, Saud A. Binjuwair, Ibrahim A. Alshunaifi, Abdullah M. Alkhedhair, Abdullah J. Alabduly, Mohammed S. Almorat, Miqad S. Albishi
JOURNAL OF ENGINEERING RESEARCH
(2020)
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.