Article
Energy & Fuels
Chao Jin, Xin Liu, Tianyun Sun, Jeffrey Dankwa Ampah, Zhenlong Geng, Mubasher Ikram, Jing Ji, Gang Wang, Haifeng Liu
Summary: This study focuses on improving the properties of fuel by mixing ethanol with palm oil/palm kernel oil and selecting suitable co-solvents. The results show that temperature and ethanol ratio affect fuel properties, and different co-solvents have their own advantages in adjusting different properties of the fuel.
Article
Thermodynamics
Elaine Siew Kuan Why, Hwai Chyuan Ong, Hwei Voon Lee, Wei-Hsin Chen, N. Asikin-Mijan, Mahendra Varman
Summary: The research shows that 8% Pd/C catalyst with palm kernel oil after deoxygenation can achieve the best yield and fuel selectivity. The blending of 20% volume of palm kernel oil-derived bio-jet fuel with Jet A-1 fuel is considered the most promising ratio, as it has the most favorable low temperature fluidity and good combustion characteristics.
ENERGY CONVERSION AND MANAGEMENT
(2021)
Article
Materials Science, Multidisciplinary
Naoufal Harich, Rania Bassou, Matthew W. Priddy, Thomas E. Lacy Jr, Charles U. Pittman Jr, Santanu Kundu
Summary: The effects of Jet A fuel and alternative fuel blends on carbon/epoxy composites were studied. The fuel absorption behavior and its impact on the composites' glass transition temperature were analyzed. No significant differences in fuel absorption were observed for different fuels. The arrangement of fiber tows and individual filaments within plies appeared to affect fuel uptake.
MATERIALS & DESIGN
(2022)
Article
Engineering, Mechanical
Nur Allif Fathurrahman, Ahmad Syihan Auzani, Rizal Zaelani, Riesta Anggarani, Lies Aisyah, Maymuchar, Cahyo Setyo Wibowo
Summary: In this study, the lubricating properties of binary blends of palm oil biodiesel with commercial petroleum diesel fuel and HVO were analyzed using a high-frequency reciprocating rig. It was found that the addition of palm oil biodiesel successfully improved the lubricity properties of the diesel fuel, reducing the friction coefficient and wear rate.
Article
Chemistry, Applied
Chao Jin, Xin Liu, Tianyun Sun, Jeffrey Dankwa Ampah, Zhenlong Geng, Jing Ji, Gang Wang, Haifeng Liu
Summary: Using fossil fuels in engines has led to energy shortages, carbon emissions, and environmental pollution. Methanol is considered a potential alternative fuel, but its use in diesel engines is hindered by poor auto-ignition properties and low heating value. Blending methanol with vegetable oil, particularly palm oil, has been proposed as a solution. Experimental results indicate stable microemulsions can be formed using methanol and palm kernel oil, with tetrahydrofuran as the most effective co-solvent. Palm kernel oil has a higher affinity for methanol compared to palm oil. Conductivity tests confirm the stability of the microemulsion. This study provides valuable insights for preparing carbon-neutral fuels in diesel engines.
FUEL PROCESSING TECHNOLOGY
(2021)
Article
Agronomy
Sebastian Giraldo Montoya, Sergio Yoshimitsu Motoike, Kacilda Naomi Kuki, Manuela Maria Cavalcante Granja, Maria Antonia Machado Barbosa, Domingo Savio Queiroz, Paulo Roberto Cecon
Summary: This study demonstrates that the A. aculeata-B. decumbens grass intercropping system is a viable agroforestry practice for tropical regions. By improving understory microclimatic conditions in silvopastoral systems, it enhances forage growth efficiency and provides livestock with quality food and comfort. Additionally, it offers beneficial environmental services such as efficient carbon sequestration and storage.
AGRONOMY FOR SUSTAINABLE DEVELOPMENT
(2021)
Article
Energy & Fuels
Navaneetha Krishnan Balakrishnan, Yew Heng Teoh, Heoy Geok How, Thanh Danh Le, Huu Tho Nguyen
Summary: The importance of researching sustainable fuels derived from biological sources is emphasized by issues such as rising fuel prices, fuel costs, and lowering reserves. This study focuses on experiments with ethanol and propanol-based ternary blends on a CI engine. The results show that ternary blends have lower brake thermal efficiency and higher brake specific energy consumption compared to diesel and binary blends due to their lower calorific value. Despite lower emissions of oxides of nitrogen and smoke opacity, unburned hydrocarbon and carbon monoxide emissions increase with ternary blends due to the interactive effect of lower cetane number, higher latent heat of vaporization, and lower kinematic viscosity of alcohols.
Article
Energy & Fuels
Randall C. Boehm, Logan C. Scholla, Joshua S. Heyne
Summary: By increasing the fuel temperature limit and improving fuel thermal efficiency, it is possible to achieve energy savings of over 0.5% in engine performance, with 60% coming from the high thermal stability of synthetic fuels.
Article
Chemistry, Physical
K. Thiruselvam, S. Murugapoopathi, T. Ramachandran, Kassian T. T. Amesho
Summary: The study shows that palm biodiesel has inferior engine performance and moderate reduction in pollutant gases compared to neat diesel. However, the application of hydrogen induction in the engine improves both engine performance and pollutant reduction.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Energy & Fuels
Patricia T. Souza, Willian L. G. Silva, Antonio J. A. Meirelles, Matthieu Tubino
Summary: Short-chain carboxylic acids like formic acid and acetic acid were monitored by ion chromatography during the storage of various biodiesel samples, with MBS biodiesel showing corrosive activity after 335 days. The study found that biodiesels with higher saturated and lower unsaturated contents are more stable, with the oxidative stability order being MBMK > MBPK > MBS + MBMK > MBS + MBPK > MBS. The average formic acid formation rate was also correlated with the saturated/unsaturated ratio of the samples.
Article
Chemistry, Multidisciplinary
Songtao Liu, Riyang Chen, Yi Wang, Yulin Chen, Xiaoyu Guo, Haozhong Huang
Summary: Coal-to-liquid (CTL) fuel is a promising alternative fuel in China due to its excellent properties, but little research has been done on its spray and combustion processes. This study investigated the characteristics of diesel fuel blends with different CTL blending ratios. The results showed that higher injection pressure led to longer spray tip penetration and enlarged spray cone angle under non-evaporation conditions. Under evaporation conditions, the STP and SCA of the fuel decreased with increasing CTL mixing ratio due to higher volatility, while ignition delay period shortened and flame lift-off length decreased.
Article
Thermodynamics
Yu Liu, Junjian Tian, Fengyu Li, Kai Han, Lin Bao, Wenliang Zhou, Qizhao Lin
Summary: This study reveals the effects of adding PODE to biodiesel on spray and mixing characteristics, filling the gap in research on biodiesel-PODE blends. The findings indicate that adding PODE improves the spray and air-fuel mixing quality of biodiesel.
COMBUSTION SCIENCE AND TECHNOLOGY
(2023)
Article
Thermodynamics
I. Ibrahim Enagi, K. A. Al-attab, Z. A. Zainal, Yew Heng Teoh
Summary: Micro gas turbine (MGT) is a promising option for green distributed cogeneration, and it can utilize a wider range of renewable fuel sources. A new chamber geometry was designed and tested for liquid biofuels combustion. The system achieved an overall efficiency of 24.7% and demonstrated low NOx emissions with palm biodiesel in the lab-scale combined heat and power (CHP) configuration.
Article
Thermodynamics
Elaine Siew Kuan Why, Hwai Chyuan Ong, Hwei Voon Lee, Wei-Hsin Chen, N. Asikin-Mijan, Mahendra Varman, Wen Jing Loh
Summary: The study focused on producing bio-jet fuel from different types of palm oil through deoxygenation process using various catalysts. The results showed that Pd/C catalyst at 8 wt% had the best deoxygenation efficiency. The physicochemical properties of the produced liquid fuel met the standard Jet A-1 fuel requirements.
Article
Chemistry, Physical
B. Kanimozhi, Govind Kumar, Mishal Alsehli, Ashraf Elfasakhany, Dhinakaran Veeman, Santhosh Balaji, Thanu Thiran, T. R. Praveen Kumar, Manigandan Sekar
Summary: The main purpose of this study is to analyze the effects of oxy hydrogen (HHO) along with the Moringa oleifera biodiesel blend on engine performance, combustion, and emission characteristics. The results show that adding HHO gas to the blend can reduce fuel consumption and the concentration of CO, HC, and CO2 emissions, but does not reduce the formation of NO. However, adding HHO to the biodiesel can significantly reduce the average NOx.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Energy & Fuels
Michelle Garcia Gomes, Douglas Queiroz Santos, Luis Carlos de Morais, Daniel Pasquini
Summary: This study investigated the use of different sources of starch, cellulose, and Select 450(R) as adsorbents in biodiesel purification, showing that these adsorbents can effectively improve the purification efficiency and meet the specifications of ANP in Brazil. Select 450(R) along with potato and cassava starch showed the best results in a combined alkalinity test, while potato, cassava, and rice starches as well as Select 450(R) were effective in reducing turbidity.
Article
Energy & Fuels
Ademar Domingos Viagem Maquina, Baltazar Vasco Sitoe, Jose Eduardo Buiatte, Douglas Queiroz Santos, Waldomiro Borges Neto
Article
Chemistry, Analytical
Baltazar Vasco Sitoe, Ademar Domingos Viagem Maquina, Lucas Caixeta Gontijo, Ligia Rodrigues De Oliveira, Douglas Queiroz Santos, Waldomiro Borges Neto
ANALYTICAL LETTERS
(2020)
Article
Chemistry, Analytical
Ademar Domingos Viagem Maquina, Baltazar Vasco Sitoe, Welington de Oliveira Cruz, Douglas Queiroz Santos, Waldomiro Borges Neto
Article
Chemistry, Analytical
Ademar Domingos Viagem Maquina, Baltazar Vasco Sitoe, Felipe Bachion de Santana, Douglas Queiroz Santos, Waldomiro Borges Neto
Summary: A methodology combining H-1 NMR spectroscopy with DD-SIMCA model was developed to monitor adulteration in B10 blend of diesel and crambe biodiesel. The method achieved high efficiency in both training and testing datasets, accurately classifying samples.
ANALYTICAL LETTERS
(2021)
Article
Chemistry, Analytical
Ademar Domingos Viagem Maquina, Maria Teresa Carvalho Ferreira, Edvando Souza Teles, Douglas Queiroz Santos, Waldomiro Borges Neto
Summary: An alternative methodology using MIR spectroscopy combined with PLS was developed to monitor the biokerosene content in palm kernel blend with kerosene. The efficiency of this method was analyzed based on accuracy and figures of merit, meeting the requirements of both Brazilian standard ABNT NBR 15568 and ASTM E1655-05. The high correlation coefficient (R) exceeding 0.99 between actual and predicted values suggests the feasibility, efficiency, and suitability of this analytical methodology for inspection agencies to control biokerosene content in palm kernel mixture with diesel.
BRAZILIAN JOURNAL OF ANALYTICAL CHEMISTRY
(2021)
Article
Chemistry, Multidisciplinary
Samuel P. Chagas, Douglas Q. Santos, Jose D. Fabris, Luiz Vitor L. Harter, Juliana Q. da Silva
Summary: The proposed approach focuses on separating light fractions with carbon chains between 8 to 14 carbons from biodiesel, and the mixture can be a viable substitute for pure Jet-A1 kerosene for propulsion of turbine aircraft.
JOURNAL OF THE BRAZILIAN CHEMICAL SOCIETY
(2022)
Article
Chemistry, Multidisciplinary
Ligia R. de Oliveira, Ademar D. Maquina, Baltazar Sitoe, Lucas G. da Costa, Raiana R. Seixas, Douglas Q. Santos
Summary: Public policies in Brazil have been developed to promote the use of biofuels, with a focus on quality control to avoid adulterations in the mandated blend. A model incorporating analytical and chemometric techniques has been proposed to classify the content of methyl biodiesel in the biodiesel/diesel mixture, showing promising results for efficient classification.
REVISTA VIRTUAL DE QUIMICA
(2021)
Article
Chemistry, Multidisciplinary
Ademar Maquina, Baltazar Sitoe, Maria Ferreira, Douglas Santos, Waldomiro Borges Neto
Article
Chemistry, Multidisciplinary
Lucas G. da Costa, Baltazar Sitoe, Douglas Q. Santos, Waldomiro Borges Neto
Article
Chemistry, Multidisciplinary
Luiz Vitor Leonardi Harter, Douglas Queiroz Santos, Jose Domingos Fabris
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.
