Article
Thermodynamics
Kamonwat Nakason, Pongtanawat Khemthong, Wasawat Kraithong, Parinvadee Chukaew, Bunyarit Panyapinyopol, Duangta Kitkaew, Prasert Pavasant
Summary: Torrefaction is a promising biomass thermal conversion technology for producing biochar, with CO2 atmosphere producing biochar with the lowest ash content. The study found that torrefaction temperature has a significant impact on the fuel properties of torrified cassava rhizome, and that torrefaction process mainly removes oxygen and hydrogen contents through decarbonization, dehydrogenation, and deoxygenation pathways. Economic feasibility analysis showed that torrefaction of cassava rhizome is cost-advantageous under certain conditions.
CASE STUDIES IN THERMAL ENGINEERING
(2021)
Article
Green & Sustainable Science & Technology
Zdenka Kwoczynski, Jiri Cmelik
Summary: The study characterized twelve different biomass waste generated in the Czech Republic to determine their suitability for biochar production. The sample of Extracted rapeseed scrap was identified as the most suitable material for biochar production due to its high nutrient content and thermal stability.
JOURNAL OF CLEANER PRODUCTION
(2021)
Article
Chemistry, Analytical
Dianqiang Li, Chao Li, Mengjiao Fan, Yuewen Shao, Yifan Sun, Lijun Zhang, Shu Zhang, Yong Huang, Bin Li, Shuang Wang, Xun Hu
Summary: Pyrolysis is affected by low-temperature pretreatment, which changes the structure of the feedstock and affects the evolution of pyrolysis products. Cellulose torrefaction at different temperatures was conducted to study the effect of low-temperature pretreatment on biochar formation. The results showed that the pretreatment at 350 degrees C favored gas formation in pyrolysis but resulted in fewer light organics. On the other hand, pretreatment at 260 degrees C facilitated the formation of anhydrate sugars and organics with pi-conjugated structures.
JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
(2023)
Review
Agricultural Engineering
Zheli Ding, Yu Ge, Sarath C. Gowd, Ekta Singh, Vinay Kumar, Deepshi Chaurasia, Vikas Kumar, Karthik Rajendran, Preeti Chaturvedi Bhargava, Peicong Wu, Fei Lin, Sharareh Harirchi, Veeramuthu Ashok Kumar, Ranjna Sirohi, Raveendran Sindhu, Parameswaran Binod, Mohammad J. Taherzadeh, Mukesh Kumar Awasthi
Summary: Environmental contamination due to urbanization and industrialization is a significant concern. The scientific community is exploring sustainable and eco-friendly solutions, including the use of biochar. This review examines the potential of using fruit wastes, specifically tropical fruit tree residues, for producing efficient biochar materials. It discusses various aspects of biochar production and its applications in areas such as wastewater treatment, catalysts, and carbon sequestration.
BIORESOURCE TECHNOLOGY
(2023)
Article
Energy & Fuels
Kristina Krysanova, Alla Krylova, Mayya Kulikova, Albert Kulikov, Olga Rusakova
Summary: Biochars made by hydrothermal carbonization and torrefaction have stable structures and rich chemical properties, which make them suitable for both fuel and as substitutes for fossil coals.
Article
Thermodynamics
Qing He, Abdul Raheem, Lu Ding, Jianliang Xu, Chen Cheng, Guangsuo Yu
Summary: This study found that wet torrefaction had a greater impact on softwood biochar than hardwood biochar, with the critical wet torrefaction temperature determining changes in reactivity and kinetic parameters. Wet torrefaction affected both the inorganic and organic components in biochar, leading to the removal of certain components in both types of biochar.
ENERGY CONVERSION AND MANAGEMENT
(2021)
Article
Chemistry, Physical
Boguslawa Lapczynska-Kordon, Zbigniew Slipek, Karolina Slomka-Polonis, Jakub Styks, Tomasz Hebda, Slawomir Francik
Summary: This study analyzed the feasibility of using goldenrod for biochar production. The results showed that torrefaction process increased the ash content, calorific value, and heat of combustion of biochar while decreasing the volatile matter content. The plant species and sampled parts were found to have a significant impact on the physicochemical properties of both raw biomass and biochar.
Article
Energy & Fuels
M. Khairy, M. Amer, M. Ibrahim, S. Ookawara, H. Sekiguchi, A. Elwardany
Summary: Torrefaction improves the uniformity and energy-producing capabilities of biomass. In this study, bean husk and sesame stalks were torrefied at different temperatures and times. The optimal conditions for both materials were achieved at 275 degrees C and 30 minutes.
BIOMASS CONVERSION AND BIOREFINERY
(2023)
Article
Energy & Fuels
Jianghong Peng, Lei Zhang, Elodie Surgot Meulien, Xiaotao T. Bi, Jim C. Lim, Wei-hsin Chen
Summary: The study found that using waste plastics as binders could produce strong biochar pellets at relatively low temperatures (300-330 degrees C). The optimal fraction of plastic binder would be between 5 and 10 wt %. As the temperature of biochar production increased, the strength of the pellets decreased even with binders.
Article
Engineering, Environmental
Abdullah F. Qatarneh, Capucine Dupont, Virginia Ruiz-Villanueva, Denilson da Silva Perez, Radwa M. Ashour, Herve Piegay, Mario J. Franca
Summary: Driftwood in river catchments can pose safety hazards for infrastructures like dams, but can be valorized for biochar production. This study provides a comprehensive analysis of different physico-chemical properties of river driftwood, indicating potential for utilization as feedstock for biochar production regardless of genera or type.
Article
Energy & Fuels
P. Brachi, P. Bareschino, C. Tregambi, M. Urciuolo, G. Ruoppolo, E. Mancusi
Summary: This article numerically analyzes the integration between solar-driven torrefaction, Power-to-Gas, and Chemical Looping Combustion systems. The results show that torrefied samples obtained through specific experimental runs can increase the lower heating values of selected feedstocks and achieve CO2 conversion degrees of above 98%.
Article
Biotechnology & Applied Microbiology
Chia-Yang Chen, Wei-Hsin Chen, Steven Lim, Hwai Chyuan Ong, Aristotle T. Ubando
Summary: This study examined the synergistic effect of co-torrefaction with waste epoxy resins and fir on biochar improvement, with the main interactions being catalytic reaction and blocking effect. Sodium in the waste resin had a notable catalytic effect on liquid products, leading to increased volatile matter emissions and antagonistic effect on solid yield.
ENVIRONMENTAL TECHNOLOGY & INNOVATION
(2021)
Article
Agricultural Engineering
Yuewen Shao, Chao Li, Mengjiao Fan, Guoming Gao, Yuchen Jiang, Kai Sun, Lijun Zhang, Shu Zhang, Leilei Xu, Xun Hu
Summary: This study investigated the influence of torrefaction and hydrothermal carbonization (HTC) on the pyrolysis behaviors of starch-rich food waste. The study found that torrefaction did not significantly affect the yield of pyrolytic products, but made the torrefied rice more hydrophobic. HTC significantly enhanced the overall yield of bio-oil and improved the combustion performance of the resulting biochar. In addition, HTC formed dominantly microsphere morphology in the hydrochar and biochar.
INDUSTRIAL CROPS AND PRODUCTS
(2023)
Article
Green & Sustainable Science & Technology
Wadzanai P. Mafunga, Stuart R. D. Ferrer, Annegret Stark
Summary: Biorefineries are crucial for the development of bio-based economies. In South Africa, the further development of sugarcane biorefineries may involve the use of sugarcane fibre as a feedstock. The current payment system for sugarcane incentivises growers to prioritize sucrose yield over fibre yield, which may hinder the production of energy cane cultivars. Through mathematical modeling and case studies, this research highlights the potential impact of introducing price mechanisms for sugarcane fibre on farm-level decisions and overall biomass availability, ultimately revitalizing the sector and informing policy makers.
RENEWABLE & SUSTAINABLE ENERGY REVIEWS
(2023)
Article
Agricultural Engineering
Yan Shen, Jian-Zhong Guo, Li-Qun Bai, Xiao-Qin Chen, Bing Li
Summary: The research shows that biochar prepared from torrefaction of ammonium persulphate pretreated bamboo (APBC) has high adsorption capacity for Pb(II), mainly through inner-sphere surface complexation adsorption. The high adsorption capacity is attributed to the high content of nitrogen and oxygen-containing functional groups in APBC.
BIORESOURCE TECHNOLOGY
(2021)
Article
Thermodynamics
Ahmet Cay
Article
Materials Science, Textiles
Rumbidzai E. Zizhou, Ahmet Cay, E. Perrin Akcakoca Kumbasar, C. Ozgur Colpan
Summary: This study investigated the electrospinning of PVA/Nafion (R) nanofibers and evaluated their stability for use in direct methanol fuel cells under simulated conditions. The thermally stabilized nanofibrous membrane showed good stability against water, methanol, and oxidative effects. The membranes exhibited successful stabilization and sulfonation, preserving the nanofibrous structure even after treatments.
JOURNAL OF INDUSTRIAL TEXTILES
(2021)
Article
Green & Sustainable Science & Technology
Burcin Utebay, Pinar Celik, Ahmet Cay
JOURNAL OF CLEANER PRODUCTION
(2019)
Article
Green & Sustainable Science & Technology
Ahmet Cay, Jale Yanik, Cigdem Akduman, Gozde Duman, Hasan Ertas
JOURNAL OF CLEANER PRODUCTION
(2020)
Article
Materials Science, Textiles
Seniha Morsumbul, Emriye Perrin Akcakoca Kumbasar, Ahmet Cay
Summary: This study focused on the encapsulation of photochromic dyes by spray drying using an aqueous ethyl cellulose dispersion and a spirooxazine-based photochromic dye. Various encapsulation parameters were investigated and the encapsulation results were evaluated by different methods. The study determined the optimal parameters for microcapsule production and suggested that spray drying could be a practical method for producing photochromic smart textiles.
AATCC JOURNAL OF RESEARCH
(2021)
Article
Materials Science, Textiles
Ahmet Cay, Seniha Morsumbul, Emriye Perrin Akcakoca Kumbasar
Summary: In this study, exergy analysis of microencapsulation of photochromic dyes by the spray drying method was conducted. A proposed exergy model for the process of encapsulation of spirooxazine-based photochromic dye with ethyl cellulose as the solvent. The highest exergy efficiency was obtained at a drying temperature of 120 degrees C and using an aqueous system as the solvent.
AATCC JOURNAL OF RESEARCH
(2022)
Article
Materials Science, Textiles
Seniha Morsumbul, Emriye Perrin Akcakoca Kumbasar, Ahmet Cay
Summary: This article introduces a method of applying photochromic dye microcapsules to cotton fabrics and evaluates the color change, ultraviolet transmittance, and fatigue resistance of the photochromic fabrics. The experimental results show that the photochromic fabrics maintain good color and ultraviolet protection performance after multiple washings and ultraviolet irradiations. The use of hindered amine light stabilizers improves the fatigue resistance of the photochromic dye capsules.
AATCC JOURNAL OF RESEARCH
(2022)
Article
Materials Science, Textiles
Solomon Tilahun Desisa, Eylen Sema Dalbasi, Ahmet Cay
Summary: The aim of this study was to produce superhydrophobic cotton fabric using TiO2 and SiO2 nanoparticles and polydimethylsiloxane (PDMS) through layer-by-layer deposition method. It was found that increasing the bilayer number and PDMS concentration improved the superhydrophobicity. Surface analysis showed the formation of roughness, and tests demonstrated high water and stain repellency values and durability to washing.
JOURNAL OF NATURAL FIBERS
(2023)
Article
Materials Science, Textiles
Emire Ulku Parmakoglu, Ahmet Cay, Jale Yanik
Summary: This study investigated the recycling of solid textile wastes into activated carbon and its potential use in color removal. Cotton and cotton/polyester-blended fabric wastes and textile wastewater treatment sludge were used as the solid textile wastes. A two-stage method, involving low temperature carbonization and chemical activation with ZnCl2, was applied to produce activated carbon with large surface area and rich-pore structure. The activated carbons showed high dye adsorption capacity and demonstrated potential for solid textile waste management and water remediation.
AATCC JOURNAL OF RESEARCH
(2023)
Article
Materials Science, Textiles
Ismail Ivedi, Ahmet Cay
Summary: This study explored the use of synthetic stones and peach kernels as alternatives to pumice stone in the denim stone washing process. The performance of each alternative was evaluated using different washing methods. The effects of stone washing were compared, as well as the energy consumption and carbon dioxide emission of each method. The results showed that synthetic stones and peach kernels performed better in the low liquor method, with lower energy consumption and carbon dioxide emission. Therefore, it was concluded that these alternatives could be sustainable replacements for pumice stone, especially when combined with the low liquor method.
TEKSTIL VE KONFEKSIYON
(2023)
Article
Green & Sustainable Science & Technology
Burcin Utebay, Pinar Celik, Ahmet Cay
Summary: This study aims to determine the appropriate methods and parameters for the eco-friendly production of finer yarns from recycled cotton fibers. The yarn properties were tested and compared to determine the best production parameters. The results showed that increasing the proportion of virgin cotton fiber in the yarn improved its properties.
JOURNAL OF CLEANER PRODUCTION
(2023)
Article
Materials Science, Textiles
Ahmet Cay, Serdin Celik, Ayhan Yardim, Benhur Selisik
INDIAN JOURNAL OF FIBRE & TEXTILE RESEARCH
(2019)
Proceedings Paper
Engineering, Industrial
N. Oglakcioglu, A. Cay, B. Sari
AEGEAN INTERNATIONAL TEXTILE AND ADVANCED ENGINEERING CONFERENCE (AITAE 2018)
(2018)
Proceedings Paper
Engineering, Industrial
A. Cay, J. Yanik, A. Hanoglu
AEGEAN INTERNATIONAL TEXTILE AND ADVANCED ENGINEERING CONFERENCE (AITAE 2018)
(2018)
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.
