Article
Energy & Fuels
Em Canh Pham, Tuong Vi Thi Le, Kim Chau Thi Le, Huong Ha Hong Ly, Bich Ngoc Thi Vo, Dat Van Nguyen, Tuyen Ngoc Truong
Summary: In this study, response surface methodology and central composite design were used to optimize the production of biodiesel from catfish oil through a microwave-assisted single-step transesterification process. The models predicted the biodiesel yield using acetone and isopropanol as co-solvents, and the results showed that isopropanol had similar effects to acetone. The optimal conditions for biodiesel production were determined, and the experimental results confirmed the accuracy of the regression models. The properties of catfish oil biodiesel produced under the optimum conditions met the EN 14214 standard specifications.
Article
Energy & Fuels
Tongxin Qu, Shengli Niu, Xiangyu Zhang, Kuihua Han, Chunmei Lu
Summary: This study synthesized calcium modified Zn-Ce/Al2O3 heterogeneous base catalysts through three different methods and applied them in biodiesel production. The catalyst synthesized by the hydrothermal method exhibited the best catalytic performance, and showed good reusability with high biodiesel yield even after multiple cycles.
Article
Chemistry, Physical
Shiva Prasad Gouda, Jasha Momo H. Anal, Puneet Kumar, Amarajothi Dhakshinamoorthy, Umer Rashid, Samuel Lalthazuala Rokhum
Summary: This study focuses on the transesterification of soybean oil to biodiesel using a CaO-ZrO2 heterogeneous catalyst derived from biomass and MOF under microwave irradiation. The optimization of various parameters was conducted using the response-surface methodology (RSM) and the catalyst and biodiesel were characterized extensively. The maximum yield obtained after optimization was 97.22 ± 0.4% with specific reaction conditions.
Article
Energy & Fuels
Maria Hasnain, Zainul Abideen, Shagufta Naz, Ute Roessner, Neelma Munir
Summary: The study investigates the use of microwave irradiation for simultaneous in situ transesterification and extraction of algae lipids to enhance biodiesel production. Results show that microwave technique significantly improves biodiesel yield, with potential optimization in catalyst concentration and reaction time. The study highlights Ulothrix sp. as the most efficient feedstock for biodiesel production.
BIOMASS CONVERSION AND BIOREFINERY
(2023)
Article
Agricultural Engineering
Yashvir Singh, Abhishek Sharma, Nishant Kumar Singh
Summary: Supercritical methanol transesterification is an effective method for processing biodiesel, which can produce a substantial amount of biodiesel in a short period of time and solve the problems associated with catalyst processing. The study found that the reaction temperature, methanol to oil ratio, reaction time, and pressure have a significant impact on the biodiesel production in the supercritical methanol transesterification process.
BIOMASS & BIOENERGY
(2022)
Article
Environmental Sciences
Elamathi Vimali, Arumugasamy Senthil Kumar, Nagamalai Sakthi Vignesh, Balasubramaniem Ashokkumar, Amarajothi Dhakshinamoorthy, Aswathy Udayan, Muthu Arumugam, Arivalagan Pugazhendhi, Perumal Varalakshmi
Summary: This study evaluated the biodiesel potential of indigenous microalgae Desmodesmus sp. VV2 and optimized the culture medium using Response Surface Methodology (RSM) to enhance lipid accumulation. The results showed that under optimized conditions, the microalgae exhibited significantly increased lipid and saturated fatty acid (SFA) content, with the highest total FAME content achieved. The quality of the biodiesel produced from the optimized culture medium also met international standards.
Article
Agricultural Engineering
T. Ganesha, S. B. Prakash, S. Sheela Rani, B. S. Ajith, G. C. Manjunath Patel, Olusegun D. Samuel
Summary: This study utilized the Grey Wolf Optimizer (GWO) to build a novel composite biodiesel from animal waste fat, cottonseed, and crude rice bran. The effectiveness and commercial viability of the biodiesel production were investigated using Response Surface Methodology (RSM) and GWO modeling, resulting in a high-quality biodiesel that meets quality standards.
INDUSTRIAL CROPS AND PRODUCTS
(2023)
Article
Green & Sustainable Science & Technology
Gul Muhammad, Ange Douglas Potchamyou Ngtcha, Yongkun Lv, Wenlong Xiong, Yaser A. El-Badry, Eylem Asmatulu, Jingliang Xu, Md Asraful Alam
Summary: This study investigates the optimal conditions and modeling for biodiesel production from wet microalgae, and validates the high quality of the produced biodiesel through experimental analysis in comparison with European and US standards.
Article
Biotechnology & Applied Microbiology
Kiruthika Thangavelu, Pugalendhi Sundararaju, Naganandhini Srinivasan, Sivakumar Uthandi
Summary: In this study, microbial lipids were produced from sago processing wastewater and converted into biodiesel through transesterification. The process was optimized using response surface methodology to achieve the highest lipid yield and FAME content. The results suggested that microbial lipids derived from Candida tropicalis ASY2 could serve as potential alternative oil substitutes for sustainable biodiesel production to meet the increasing energy demands.
MICROBIAL CELL FACTORIES
(2021)
Article
Green & Sustainable Science & Technology
Felix Aibuedefe Aisien, Eki Tina Aisien
Summary: The study focuses on modeling and optimizing the transesterification process of rubber seed oil (RSO) to biodiesel using sulfonated CaO derived from snail shells as a bifunctional heterogeneous catalyst. The results show that a maximum biodiesel yield of 97.6% can be obtained with a 12:1 methanol to oil molar ratio, 80 degrees C reaction temperature, 2.5 h reaction time, and 2.5 wt% catalyst loading. The catalyst also demonstrates good recyclability and the produced biodiesel meets the fuel property standards.
Article
Agricultural Engineering
Bahar Ghasemzadeh, Amir Abbas Matin, Biuck Habibi, Mostafa Ebadi
Summary: This research aims to design and prepare a new magnetically recoverable catalyst based on agrowastes, specifically cotton waste, for the production of biodiesel. The proposed core-shell nanocomposite catalyst showed excellent performance in catalyzing transesterification reaction and achieved optimal results under certain conditions.
INDUSTRIAL CROPS AND PRODUCTS
(2022)
Article
Materials Science, Multidisciplinary
Bahar Ghasemzadeh, Amir Abbas Matin, Biuck Habibi, Mostafa Ebadi
Summary: The aim of this research is to develop magnetically recoverable Heteropoly acid (HPA) based catalyst (Rubber-Fe3O4@SiO2@H3PMo12O40) for biodiesel production. The proposed catalyst, prepared by coating magnetic rubber powder with silica and impregnating it with phosphomolybdic acid, showed a Keggin structure. The performance of the catalyst in transesterification reaction was optimized, with the best conditions being 3w/w % catalyst dosage, 3 h reaction time, 12:1 molar ratio of methanol to oil, and 69 degrees C reaction temperature. The production yield was over 85% for four runs and slightly decreased to 78.87% on the fifth try.
MATERIALS CHEMISTRY AND PHYSICS
(2022)
Article
Chemistry, Applied
Siyuan Zou, Hao Zhang, Jianli Wang
Summary: Recently, Pickering interfacial catalyst (PIC) has been widely used for liquid-liquid reactions to enhance mass transfer and immobilize active sites. To improve reaction efficiency, a synergistic method combining Pickering emulsion and ultrasound concepts was developed for efficient production of biodiesel.
JOURNAL OF OLEO SCIENCE
(2023)
Article
Materials Science, Ceramics
Basir Maleki, Hossein Esmaeili
Summary: Fe3O4/SiO2@ZnO nanocomposite was synthesized as a heterogenous catalyst for biodiesel generation from waste cooking oil. The nanocomposite exhibited a specific surface area of 32.56 m(2) g(-1), mean particle size of 10.46 nm, and pore volume of 0.15 cm(3) g-1. The distribution of Si and Zn elements in the lattice of Fe3O4 nanoparticles was successfully achieved. The nanocatalyst showed a maximum biodiesel yield of 97.23% under optimal conditions and could be efficiently reused for seven cycles with a yield of 88.36%. The Fe3O4/SiO2@ZnO nanocatalyst is a promising catalyst for biodiesel generation from waste cooking oil.
CERAMICS INTERNATIONAL
(2023)
Article
Energy & Fuels
Parvesh Kumar, Naveen Kumar
Summary: Biodiesel is considered an effective alternative to petroleum diesel, but its production process is time and energy consuming. By using optimization tools like Response Surface Methodology (RSM), the number of experiments can be reduced and the yield can be increased.
ENERGY SOURCES PART A-RECOVERY UTILIZATION AND ENVIRONMENTAL EFFECTS
(2021)
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.