Article
Environmental Sciences
Viktor Alexandrovich Kuznetsov, Daria Mikhailovna Bozheeva, Andrey Viktorovich Minakov
Summary: Combustion or gasification of coal in a nitrogen-free environment is a promising technology for reducing the carbon footprint. This study numerically investigates the oxy-gasification processes of pulverized coal in a CO2-H2O-O-2 environment and examines the influence of various factors on the physicochemical processes and syngas composition. The results show that increasing oxygen concentration in the blast can stabilize ignition and combustion of coal, while decreasing the excess oxygen ratio leads to increased combustible losses in the gasifier.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Thermodynamics
Seokwon Yun, Sunghoon Lee, Mun-Gi Jang, Jin-Kuk Kim
Summary: This work systematically evaluates the economic implications of introducing absorption and membrane capture technologies to a power plant. Cost diagrams are used to estimate the cost of electricity, CO2 capture, and avoidance cost of CO2 capture-integrated power plant, allowing for fair comparison of different capture technologies. The detailed breakdown of key costing elements between the power plant and the capture plant provides insights for research and development direction.
Article
Chemistry, Physical
R. Cooper, D. Bove, E. Audasso, M. C. Ferrari, B. Bosio
Summary: This study explores the use of a Molten Carbonate Fuel Cell (MCFC) system for power generation and CO2 concentration in an existing production plant, showcasing its potential as a low energy carbon capture method. The technical feasibility analysis showed that the specific energy requirement of the MCFC system is significantly lower than conventional MEA capture processes.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Engineering, Environmental
Boeun Kim, Jae-Goo Lee, Joungho Park, Hyojin Lee, Kyung Hwan Ryu
Summary: In line with global efforts to reduce emissions, the integration of coal-fired power generation plants with carbon capture technologies has been investigated. This study presents a comparative assessment of post-combustion CO2 capture and oxy-combustion retrofitted to a low-rank coal-based power plant from the viewpoints of economics and sustainability. The results show that oxy-combustion is more economically and environmentally attractive than post-combustion CO2 capture for low-rank coal-based power plants.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Energy & Fuels
Yan Shi, Wenqi Zhong
Summary: By conducting a comprehensive life-cycle environmental and economic assessment of oxy-coal combustion with circulating fluidized bed power plants with a pressurized combustor and a supercritical CO2 Brayton cycle, it was found that the systems have lower damage to human health and the environment, as well as relatively lower costs of electricity, CO2 capture, and CO2 avoidance. The study also discusses the impact of various parameters on economic indicators.
Article
Thermodynamics
Wenliang Meng, Dongliang Wang, Huairong Zhou, Yong Yang, Hongwei Li, Zuwei Liao, Siyu Yang, Xiaodong Hong, Guixian Li
Summary: A high proportion of renewable energy integration is a characteristic of future electric power grid, and power-to-NH3 technologies will be crucial for inter-quarter long-term energy storage. In addition, CO2 capture in coal-based power plants is essential for peak regulation. This study developed a novel urea synthesis process based on renewable energy, which resulted in significantly lower CO2 emissions compared to traditional coal and natural gas-based processes. While the production cost of the new process is higher, it becomes more economical when considering carbon tax values.
Article
Thermodynamics
Xuelei Zhang, Zhuoyuan Zhang, Gaofeng Wang
Summary: This study proposes a novel combined cycle for CO2 capture from coal-fired power plants, which integrates a supercritical CO2 Brayton cycle and an organic Rankine cycle. The results show promising exergy efficiency and economic performance. The proposed combined cycle has the potential to compete with other carbon capture technologies.
Article
Chemistry, Multidisciplinary
Mohammadamin Zarei, Ali Cherif, Vahid Khaligh, Taeksang Yoon, Chul-Jin Lee
Summary: This paper provides a techno-economic analysis of carbon capture technologies for coal-fired power plants. Key findings include the necessity of carbon capture even in ultrasupercritical plants, the significant impact of capacity factor on levelized cost of energy, and the underestimation of costs when deterministic estimates are used.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2023)
Article
Energy & Fuels
Gugulethu Nogaya, Nnamdi Nwulu, Saheed Lekan Gbadamosi
Summary: South Africa, one of the most carbon-intensive economies in the world, is currently facing an energy crisis. This paper investigates repurposing retiring coal-fired power stations for renewable energy generation in Camden, with a focus on concentrated solar power (CSP) and solar photovoltaics (SPV) in combination with storage technologies (STs). The study shows that CSP and SPV have lower power densities compared to coal-fired power plants, but are cost-effective solutions for improving power generation and reducing carbon emissions.
Article
Green & Sustainable Science & Technology
Sujeet Yadav, S. S. Mondal
Summary: A detailed investigation was conducted on an oxy-fuel combustion-based CCS system, analyzing the operational characteristics and performance compared to conventional air-fired combustion. It was found that the oxy-coal combustion power plant showed excellent ability to capture carbon dioxide with high purity and recovery rate, albeit with a slight decrease in net efficiency compared to conventional power plants.
INTERNATIONAL JOURNAL OF GREENHOUSE GAS CONTROL
(2021)
Article
Thermodynamics
Qingxi Huang, Jinduo Yao, Yukun Hu, Shengchun Liu, Hailong Li, Qie Sun
Summary: This study proposes a cost-effective solution by integrating a compressed CO2 energy storage system into a coal-fired combustion power plant with CO2 capture. The integration of energy storage allows for arbitrage opportunities from electricity price variations and improves the overall efficiency of the system.
Article
Energy & Fuels
Nicolas Spiegl, Xiangyi Long, Cesar Berrueco, Nigel Paterson, Marcos Millan
Summary: A novel process has been developed to isolate a concentrated stream of CO2 from the exhaust of a power station by operating a fluidized bed gasifier with pure O2 and recycled CO2. By combining CO2 capture with the use of biomass, net negative emissions can be achieved. Co-processing biomass with lignite can further improve overall process performance.
Article
Thermodynamics
Nan Zhou, Jun Du, Mudi Wu, Wenguo Xiang, Shiyi Chen
Summary: Pressurization increases power efficiency, and coupling it with a supercritical CO2 Brayton cycle offers higher efficiency than steam-based power cycles with CO2 capture. Three layouts of the coupled system were analyzed thermodynamically and economically, with net power efficiencies of 39.4%, 40.2%, and 41.3%. Sensitivity analysis evaluated the impact of various factors on net power efficiency, and economic analysis showed their attractiveness for coal-fired power generation with CO2 capture.
ENERGY CONVERSION AND MANAGEMENT
(2023)
Article
Engineering, Environmental
E. Portillo, Luz M. Gallego Fernandez, F. Vega, B. Alonso-Farinas, B. Navarrete
Summary: This paper proposes the use of ion transport membranes as a replacement for air separation units in oxy-combustion systems to reduce energy consumption. Simulation models show that the concept of oxygen transport membranes outperforms traditional cryogenic oxygen-fired processes in terms of net electrical efficiency, efficiency drop, and CO2 absorption.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Thermodynamics
Semie Kim, Young-Il Lim, Doyeon Lee, Wonchul Cho, Myung Won Seo, Jae Goo Lee, Yong Sik Ok
Summary: The study investigated the impact of oxy-coal power plants equipped with CO2 capture facilities on electricity efficiency, CO2 emission rate, and global temperatures. The results showed that replacing conventional coal power plants can reduce global carbon emissions and lower temperatures.
ENERGY CONVERSION AND MANAGEMENT
(2022)
Article
Green & Sustainable Science & Technology
M. Ozonoh, B. O. Oboirien, A. Higginson, M. O. Daramola
Review
Environmental Sciences
P. N. Mabalane, B. O. Oboirien, E. R. Sadiku, M. Masukume
Summary: The study investigated the economic feasibility of a hybrid of anaerobic digestion and gasification of municipal waste for electricity generation in South Africa, finding positive results across all financial indicators. The hybrid system is deemed economically viable and provides an optimal solution for energy recovery and waste disposal, as indicated by IRR, LCOE, and LCOW values. Energy price and capital expenditure were identified as major variables affecting investment decisions for the hybrid plant.
WASTE AND BIOMASS VALORIZATION
(2021)
Article
Agricultural Engineering
M. Ozonoh, B. O. Oboirien, M. O. Daramola
BIOMASS & BIOENERGY
(2020)
Article
Environmental Sciences
Z. T. Yaqub, B. O. Oboirien, A. T. Akintola
Summary: This study evaluated the chemical looping combustion of Municipal Solid Waste (MSW) using Chemcad(R) process simulation software, showing that the IG-CLC process had higher CO2 yield compared to the CLOU process, while the CLOU process had slightly higher combustion efficiency than the IG-CLC process. When blending paper and plastics, the chlorine formation decreased for most plastics except PVC.
JOURNAL OF MATERIAL CYCLES AND WASTE MANAGEMENT
(2021)
Article
Chemistry, Multidisciplinary
Jibril Abdulsalam, Jean Mulopo, Samson Oluwaseyi Bada, Bilainu Oboirien
Article
Green & Sustainable Science & Technology
O. O. Ayeleru, L. Fajimi, B. O. Oboirien, P. A. Olubambi
Summary: The study utilized machine learning to forecast the generation of municipal solid waste (MSW) in Johannesburg, demonstrating the effectiveness of algorithms such as artificial neural networks and supported vector machines in modeling MSW quantities.
JOURNAL OF CLEANER PRODUCTION
(2021)
Article
Energy & Fuels
H. B. Adedayo, S. A. Adio, B. O. Oboirien
Summary: The study reports on the bibliometric analysis of energy publications from Nigerian researchers over 45 years, showing an increasing trend in the number of publications. Collaborations in energy research mainly involve South Africa, Malaysia, the United States and the United Kingdom, with a focus on solar energy, wind energy and biomass energy. Surprisingly, there are fewer publications on gas and hydro energy, which are the main sources of electricity generation in Nigeria.
ENERGY STRATEGY REVIEWS
(2021)
Article
Energy & Fuels
Nokubonga Makhanya, Bilainu Oboirien, Jianwei Ren, Nicholas Musyoka, Adriano Sciacovelli
Summary: The research critically evaluates the performance of MOFs in adsorption thermal energy storage (ATES) applications and identifies strategies to improve operating conditions and MOFs performance in ATES, while also highlighting the gaps in knowledge. Recommendations and future research needs in this area are also provided.
JOURNAL OF ENERGY STORAGE
(2021)
Article
Chemistry, Multidisciplinary
Nnanna-jnr M. Okoro, Maxwell Ozonoh, Kevin G. Harding, Bilianu O. Oboirien, Michael O. Daramola
Summary: The study examined the improvements in fuel properties of pine sawdust wastes from Nigeria and South Africa after torrefaction, showing that Nigerian sawdust had higher heating value, enhancement factor, energy density, and solid yield compared to their South African counterpart. The heating value of torrefied fuels increased significantly for both Nigerian and South African sawdust samples when compared to raw fuels.
Article
Engineering, Chemical
Zainab Temitope Yaqub, Bilainu Obozokhai Oboirien, Marcus Hedberg, Henrik Leion
Summary: A comparative study of chemical looping combustion (CLC) with paper, plastic, and coal as fuel showed that higher temperature leads to an increase in CO2 yield and carbon conversion for all fuels. Paper had the highest CO to CO2 conversion followed by PVC and coal, attributed to the higher fraction of volatiles in paper. Scanning electron microscopy (SEM) analysis of the oxygen carrier particle showed slight differences in morphology after experiments with the three different fuels.
CHEMICAL ENGINEERING & TECHNOLOGY
(2021)
Article
Green & Sustainable Science & Technology
N. T. Sibiya, B. Oboirien, A. Lanzini, M. Gandiglio, D. Ferrero, D. Papurello, S. O. Bada
Summary: Wet torrefaction showed significant improvement in gasification properties of grass biomass with higher reactivity index and lower activation energy, likely due to the enhancement of pore structure and pore volume in the treated biomass.
Article
Thermodynamics
Lanrewaju I. Fajimi, Bilainu O. Oboirien, Thomas A. Adams II
Summary: This study evaluated the co-production efficiency of syngas and activated carbon in different reactor configurations, finding the fluidized bed gasifier to be the most effective. The surface area of activated carbon was predicted using BET computational analysis. The fluidized bed gasifier showed the highest performance in producing both syngas and activated carbon.
ENERGY CONVERSION AND MANAGEMENT-X
(2021)
Article
Environmental Sciences
C. N. Nkuna, E. R. Sadiku, G. Perry, B. Oboirien, M. K. Dludlu, C. Thompson
Summary: Chitosan-blended composites were synthesized and studied for their adsorption of chromium (VI) and sulphates. The composite CF(30) exhibited the highest removal efficiency for chromate ions.
INTERNATIONAL JOURNAL OF ENVIRONMENTAL SCIENCE AND TECHNOLOGY
(2023)
Article
Chemistry, Applied
Nokubonga P. Makhanya, Bilainu Oboirien, Nicholas Musyoka, Jianwei Ren, Patrick Ndungu
Summary: This study synthesized Metal Organic frameworks (MOFs) materials from Polyethylene terephthalate (PET) waste, which were used for water adsorption processes. The materials were characterized using physicochemical techniques, and their adsorption performance, hydrothermal stability, and heat storage capacities were analyzed.
JOURNAL OF POROUS MATERIALS
(2023)
Article
Engineering, Multidisciplinary
Matthew Adah Onu, Olusola Olaitan Ayeleru, Bilainu Oboirien, Peter Apata Olubambi
Summary: This study investigated the thermal catalytic conversion of waste PP and PE polymers into carbon nanotubes (CNTs). The results showed that the CNTs obtained from PP had a higher graphitic value and more ordered graphite structure compared to those obtained from PE. It was also found that the recycled PP and PE could be used as good alternative carbon sources for CNT production.
ADVANCES IN SCIENCE AND TECHNOLOGY-RESEARCH JOURNAL
(2023)
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.