Article
Agricultural Engineering
Samuel Kofi Tulashie, Daniel Dodoo, Godfred Appiah, Francis Kotoka, Kingsley Enoch Adukpoh
Summary: This study extracted and characterized oil from Ghana cocoa beans, finding it suitable for industrial applications with high stability and acceptable chemical properties. Kinetic and thermodynamic models showed the extraction process followed first-order kinetics and favored a forward, irreversible, endothermic, and spontaneous extraction.
INDUSTRIAL CROPS AND PRODUCTS
(2022)
Article
Engineering, Chemical
Thidarat Wongsawa, Watcharapong Ampronpong, Natthapol Traiwongsa, Ura Pancharoen, Wikorn Punyain, Suphot Phatanasri
Summary: Pure sunflower oil is newly used to extract mercury (Hg(I)) from synthetic water to protect the environment from hazardous metals and promote a benign extraction method. Optimal conditions of influencing parameters have been determined, and the extraction mechanism, reaction order, rate constant, and thermodynamic parameters of Hg(I) extraction have been investigated. Extraction of Hg(I) from other metals in industrial wastewater has also been carried out.
JOURNAL OF THE TAIWAN INSTITUTE OF CHEMICAL ENGINEERS
(2021)
Article
Chemistry, Multidisciplinary
Esther O. Babatunde, Saka H. Bamidele, Fatai A. Aderibigbe, Adeyinka S. Yusuff, Bisheswar Karmakar, Samuel Lalthazuala Rokhum, Gopinath Halder
Summary: The selection of feedstock and catalyst is crucial for the efficiency, cost, and yield of biodiesel production. The use of termite hill as an inert support, doped with cow bones, proves to be a cost-effective alternative. Two catalysts, R-SC1.5 and C-SC1.5, were developed and used in biodiesel production, with a maximum conversion rate of 95.12% achieved using C-SC1.5. The physicochemical properties of the biodiesel obtained were within the ASTM limits, and the catalyst showed reusability up to 5 cycles without significant reduction in yield.
SUSTAINABLE CHEMISTRY AND PHARMACY
(2022)
Review
Agricultural Engineering
Ramkrishna Singh, Amit Arora, Vijay Singh
Summary: Biodiesel is a green, renewable alternative to petroleum-derived diesel, but using vegetable oil for production poses challenges to food security. Advances in metabolic engineering and lipid biosynthesis have enabled the engineering of plant vegetative tissues for lipid production. Strategies for increasing lipid accumulation and maintaining ideal fatty acid profiles for biodiesel production are essential in utilizing these alternative sources.
BIORESOURCE TECHNOLOGY
(2021)
Article
Multidisciplinary Sciences
Shuai Zhao, Youhong Sun, Xiaoshu Lue, Qiang Li
Summary: The use of carbon dioxide as a heat-carrying fluid can significantly increase the efficiency of oil shale pyrolysis and the release of volatile substances.
SCIENTIFIC REPORTS
(2021)
Article
Green & Sustainable Science & Technology
Marija R. Miladinovic, Jugoslav B. Krstic, Miodrag Zdujic, Ljiljana M. Veselinovic, Djordje N. Veljovic, Ivana B. Bankovic-Ilic, Olivera S. Stamenkovic, Vlada B. Veljkovic
Summary: The hazelnut shell ash was investigated as a new base catalyst for biodiesel synthesis, achieving the highest ester content of 98% at 5% catalyst loading, 12:1 methanol-to-oil molar ratio, and 10 minutes reaction time. Homogeneous catalysis due to catalyst leaching was confirmed to contribute to the reaction, but did not determine the overall reaction rate.
Article
Energy & Fuels
Samuel Kofi Tulashie, Francis Kotoka
Summary: This study investigates the kinetics and thermodynamics of oil extraction from Moringa oleifera for biodiesel production. The results show that the extraction process is slower due to higher energy requirement and stiffer transition. However, it is a forward and spontaneous process. The extracted biodiesel meets the ASTM limits.
Article
Materials Science, Paper & Wood
Jingwen Wang, Kai Zhang, Jian Sheng, Hao Ren, Juntao Gong, Yan Wang, Dongyu Pan, Ximing Wang, Yinan Hao
Summary: This study explored the extraction of oil from walnut kernel as raw material using the method of pressing. The method of Soxhlet and ultrasonic-assisted extractions, as well as the evaluation index, optimization of extraction process, physical and chemical properties of oil, fatty acid composition, element composition, and main functional group analysis were studied. The results showed that walnut kernel could be effectively extracted with petroleum ether. The optimal extraction conditions for ultrasonic-assisted extraction were solid/liquid ratio of 1:11 (g/mL), ultrasonic power of 180 W, extraction time of 60 min, and the extraction efficiency of walnut oil was 59.13%. The optimal conditions for Soxhlet extraction were solid to liquid ratio of 1:7, temperature of 76 degrees C, time of 4 h, and the extraction efficiency of walnut oil was 58.3%. The extraction efficiency of pressing was 43.2%. Walnut oil mainly contains phosphorus, zinc, magnesium, potassium, calcium, and other elements. The fatty acids of walnut oil mainly consist of palmitic acid, palmitoleic acid, cis-linoleic acid, cis,cis,cis-9,12,15-octadecanotrienoic acid and other fatty acids, with cis linoleic acid accounting for the highest proportion in GC content, and the content of both exceeding 90%.
Article
Chemistry, Multidisciplinary
Xianglong Meng, Zhilei Qi, Cong Yu, Junjie Bian, Zhongliang Ma, Qiulian Long, Jianzheng Su
Summary: Sulfonic acid grafted catalysts significantly enhance the oil yield and quality in the aqueous conversion of oil shale, showing great potential for practical applications.
Article
Energy & Fuels
Siti Maisurah Zakaria, Siti Mazlina Mustapa Kamal, Mohd Razif Harun, Rozita Omar, Shamsul Izhar Siajam
Summary: Chlorella species are highly cultivated microalgae with valuable health benefits, and an effective method using pressurized hot water extraction (PHWE) has been developed to extract phenolic compounds from Chlorella microalgae. The extraction process follows first-order kinetics and is strongly dependent on temperature, with increasing temperature leading to higher mass transfer coefficient values. The activation energy for the extraction treatment is calculated as 11.146 kJ/mol.
BIOMASS CONVERSION AND BIOREFINERY
(2022)
Article
Engineering, Environmental
Nova Rachmadona, Yusuke Harada, Jerome Amoah, Emmanuel Quayson, Martha Aznury, Shinji Hama, Akihiko Kondo, Chiaki Ogino
Summary: This study focused on utilizing waste from the palm oil industry to produce biodiesel. By using palm acid oil and bioethanol obtained from the distillation of artificial palm sap as feedstock, the researchers were able to achieve efficient synthesis of fatty acid ethyl ester using immobilized TLL on coconut shell charcoal as the biocatalyst. The findings demonstrate the potential of an integrated approach to biorefinery operations, which can contribute to sustainable utilization of palm oil waste and cost reduction in the process.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
Article
Chemistry, Physical
Zhenping Cai, Yongxin Ding, Jiayin Zhang, Panjie Yu, Yongde Ma, Yanning Cao, Ying Zheng, Kuan Huang, Lilong Jiang
Summary: In this study, oil-soluble Mo-based ionic liquids were used as precursors to produce MoS2 catalysts for the hydroconversion of biolipids. The in situ generated MoS2 catalysts showed excellent activity in converting methyl palmitate and hexadecane to biodiesel. The structures of the catalysts were characterized, and the hydroconversion kinetics and pathways were analyzed. High conversions of feeds and selectivities of HDO products were achieved in the hydroconversion of methyl palmitate and palm oil under solvent-free condition.
JOURNAL OF CATALYSIS
(2023)
Article
Multidisciplinary Sciences
U. P. Eyibio, K. S. Ukanwa, B. Amabogha, T. F. Adepoju, A. D. Adebayo, T. A. Balogun, A. C. Eloka-Eboka
Summary: The study focused on using mixed oil (MO) extracted from Elaeis guineensis and Thai Red oilseeds to synthesize biodiesel, with a derived bio-base catalyst from calcined Littorina littorea shell powder. Optimization of production conditions led to satisfactory biodiesel yield and quality, meeting industry standards.
Article
Biotechnology & Applied Microbiology
Rauf Foroutan, Seyed Jamaleddin Peighambardoust, Reza Mohammadi, Seyed Hadi Peighambardoust, Bahman Ramavandi
Summary: In this study, rice husk ash (RHA) was used as a support to fabricate a heterogeneous catalyst (RHA/CuO/K2CO3) for biodiesel production. The specific surface area and surface roughness of the catalysts were characterized. The optimal conditions for maximum biodiesel yield and the activation energy of the transesterification process were determined. The biocompatibility of the process and the quality of the biodiesel were also confirmed.
ENVIRONMENTAL TECHNOLOGY & INNOVATION
(2023)
Article
Green & Sustainable Science & Technology
A. Ashok, T. Ratnaji, L. John Kennedy, J. Judith Vijaya, R. Gnana Pragash
Summary: The study developed a magnetically recoverable magnesium substituted zinc ferrite nanocatalyst for producing biodiesel from waste cooking oil. The catalyst, synthesized through a microwave assisted combustion process, exhibited high magnetic moment and saturation magnetization properties for efficient magnetic separation and achieving high biodiesel conversion rates.
Article
Green & Sustainable Science & Technology
Cameron Bracken, Nathalie Voisin, Casey D. Burleyson, Allison M. Campbell, Z. Jason Hou, Daniel Broman
Summary: This study presents a methodology and dataset for examining compound wind and solar energy droughts, as well as the first standardized benchmark of energy droughts across the Continental United States (CONUS) for a 2020 infrastructure. The results show that compound wind and solar droughts have distinct spatial and temporal patterns across the CONUS, and the characteristics of energy droughts are regional. The study also finds that compound high load events occur more often during compound wind and solar droughts than expected.
Article
Green & Sustainable Science & Technology
Ning Zhang, Yanghao Yu, Jiawei Wu, Ershun Du, Shuming Zhang, Jinyu Xiao
Summary: This paper provides insights into the optimal configuration of CSP plants with different penetrations of wind power by proposing an unconstrained optimization model. The results suggest that large solar multiples and TES are preferred in order to maximize profit, especially when combined with high penetrations of wind and photovoltaic plants. Additionally, the study demonstrates the economy and feasibility of installing electric heaters (EH) in CSP plants, which show a linear correlation with the penetration of variable energy resources.
Article
Green & Sustainable Science & Technology
M. Szubel, K. Papis-Fraczek, S. Podlasek
Article
Green & Sustainable Science & Technology
J. Silva, J. C. Goncalves, C. Rocha, J. Vilaca, L. M. Madeira
Summary: This study investigated the methanation of CO2 in biogas and compared two different methanation reactors. The results showed that the cooled reactor without CO2 separation achieved a CO2 conversion rate of 91.8%, while the adiabatic reactors achieved conversion rates of 59.6% and 67.2%, resulting in an overall conversion rate of 93.0%. Economic analysis revealed negative net present worth values, indicating the need for government monetary incentives.
Article
Green & Sustainable Science & Technology
Yang Liu, Yonglan Xi, Xiaomei Ye, Yingpeng Zhang, Chengcheng Wang, Zhaoyan Jia, Chunhui Cao, Ting Han, Jing Du, Xiangping Kong, Zhongbing Chen
Summary: This study investigated the effect of using nanofiber membrane composites containing Prussian blue-like compound nanoparticles (PNPs) to relieve ammonia nitrogen inhibition of rural organic household waste during high-solid anaerobic digestion and increase methane production. The results showed that adding NMCs with 15% PNPs can lower the concentrations of volatile fatty acids and ammonia nitrogen, and increase methane yield.
Article
Green & Sustainable Science & Technology
Zhong Ge, Xiaodong Wang, Jian Li, Jian Xu, Jianbin Xie, Zhiyong Xie, Ruiqu Ma
Summary: This study evaluates the thermodynamic, exergy, and economic performance of a double-stage organic flash cycle (DOFC) using ten eco-friendly hydrofluoroolefins. The influences of key parameters on performance are analyzed, and the advantages of DOFC over single-stage type are quantified.
Article
Green & Sustainable Science & Technology
Nicolas Kirchner-Bossi, Fernando Porte-Agel
Summary: This study investigates the optimization of power density in wind farms and its sensitivity to the available area size. A novel genetic algorithm (PDGA) is introduced to optimize power density and turbine layout. The results show that the PDGA-driven solutions significantly reduce the levelized cost of energy (LCOE) compared to the default layout, and exhibit a convex relationship between area and LCOE or power density.
Article
Green & Sustainable Science & Technology
Chunxiao Zhang, Dongdong Li, Lin Wang, Qingpo Yang, Yutao Guo, Wei Zhang, Chao Shen, Jihong Pu
Summary: In this study, a novel reversible liquid-filled energy-saving window that effectively regulates indoor solar radiation heat gain is proposed. Experimental results show that this window can effectively reduce indoor temperature during both summer and winter seasons, while having minimal impact on indoor illuminance.
Article
Green & Sustainable Science & Technology
Alessandro L. Aguiar, Martinho Marta-Almeida, Mauro Cirano, Janini Pereira, Leticia Cotrim da Cunha
Summary: This study analyzed the Brazilian Equatorial Shelf using a high-resolution ocean model and found significant tidal variations in the area. Several hypothetical barrages were proposed with higher annual power generation than existing barrages. The study also evaluated the installation effort of these barrages.
Article
Green & Sustainable Science & Technology
Francesco Superchi, Nathan Giovannini, Antonis Moustakis, George Pechlivanoglou, Alessandro Bianchini
Summary: This study focuses on the optimization of a hybrid power station on the Tilos island in Greece, aiming to increase energy export and revenue by optimizing energy fluxes. Different scenarios are proposed to examine the impact of different agreements with the grid operator on the optimal solution.
Article
Green & Sustainable Science & Technology
Peimaneh Shirazi, Amirmohammad Behzadi, Pouria Ahmadi, Sasan Sadrizadeh
Summary: This research presents two novel energy production/storage/usage systems to reduce energy consumption and environmental effects in buildings. A biomass-fired model and a solar-driven system integrated with photovoltaic thermal (PVT) panels and a heat pump were designed and assessed. The results indicate that the solar-based system has an acceptable energy cost and the PVT-based system with a heat pump is environmentally superior. The biomass-fired system shows excellent efficiency.
Article
Green & Sustainable Science & Technology
Zihao Qi, Yingling Cai, Yunxiang Cui
Summary: This study aims to investigate the operational characteristics of the solar-ground source heat pump system (SGSHPS) in Shanghai under different operation modes. It concludes that tandem operation mode 1 is the optimal mode for winter operation in terms of energy efficiency.
Article
Green & Sustainable Science & Technology
L. Bartolucci, S. Cordiner, A. Di Carlo, A. Gallifuoco, P. Mele, V. Mulone
Summary: Spent coffee grounds are a valuable biogenic waste that can be used as a source of biofuels and valuable chemicals through pyrolysis and solvent extraction processes. The study found that heavy organic bio-oil derived from coffee grounds can be used as a carbon-rich biofuel, while solvent extraction can extract xantines and p-benzoquinone, which are important chemicals for various industries. The results highlight the promising potential of solvent extraction in improving the economic viability of coffee grounds pyrolysis-based biorefineries.
Article
Green & Sustainable Science & Technology
Luiza de Queiroz Correa, Diego Bagnis, Pedro Rabelo Melo Franco, Esly Ferreira da Costa Junior, Andrea Oliveira Souza da Costa
Summary: Building-integrated photovoltaics, especially organic solar technology, are important for reducing greenhouse gas emissions in the building sector. This study analyzed the performance of organic panels laminated in glass in a vertical installation in Latin America. Results showed that glass lamination and vertical orientation preserved the panels' performance and led to higher energy generation in winter.
Article
Green & Sustainable Science & Technology
Zhipei Hu, Shuo Jiang, Zhigao Sun, Jun Li
Summary: This study proposes innovative fin arrangements to enhance the thermal performance of latent heat storage units. Through optimization of fin distribution and prediction of transient melting behaviors, it is found that fin structures significantly influence heat transfer characteristics and melting behaviors.