Article
Biotechnology & Applied Microbiology
Wasi Ur Rahman, Syed Mohd Yahya, Zahid A. Khan, Naseem Ahmad Khan, Gopinath Halder, Sumit H. Dhawane
Summary: The study elucidates the synthesis of Zn/CaO catalyst from waste chicken egg shells for biodiesel production using waste frying oil as feedstock. Significant factor analysis and parametric optimization were conducted using the Taguchi approach. The optimized conditions led to a maximum biodiesel yield of 93.27% with key factors being catalyst concentration and reaction temperature.
ENVIRONMENTAL TECHNOLOGY & INNOVATION
(2021)
Article
Energy & Fuels
A. Saravanan, D. Yuvaraj, P. Senthil Kumar, S. Karishma, Gayathri Rangasamy
Summary: Considering the petroleum and fuel prices in India, there is a pressing need for alternative energy sources. Fossil fuels, the current sources of fuels, are depleting and emit harmful pollutants. Fish waste has been identified as a promising alternative for biogas and biodiesel production. This review explores the benefits and advantages of using fish waste for biofuel manufacturing.
Article
Biotechnology & Applied Microbiology
Fahed Javed, Muhammad Rizwan, Maryam Asif, Shahzad Ali, Rabya Aslam, Muhammad Sarfraz Akram, William B. Zimmerman, Fahad Rehman
Summary: This study focuses on the conversion of waste resources into biodiesel using a bifunctional catalyst and microbubble-mediated mass transfer technology. The results demonstrate a high conversion rate and stability using the 7% Sr/ZrO2 catalyst. Additionally, the one-step process reduces energy consumption, improves cost-efficiency, and simplifies the production process.
BIOENGINEERING-BASEL
(2022)
Article
Engineering, Environmental
Sungyup Jung, Minyoung Kim, Young Jae Jeon, Yiu Fai Tsang, Amit Bhatnagar, Eilhann E. Kwon
Summary: This study introduced a sustainable method for handling and valorizing AF contaminated food waste, involving non-catalytic transesterification to convert peanuts into biodiesel with high yield.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Energy & Fuels
Minyoung Kim, Dong-Jun Lee, Sungyup Jung, Scott X. Chang, Kun-Yi Andrew Lin, Amit Bhatnagar, Eilhann E. Kwon, Yiu Fai Tsang
Summary: The study focused on converting peanut waste into biofuels through a thermochemical process, using biochar derived from pyrolysis of the waste as a catalyst to enhance reaction kinetics and lower reaction temperature. Biochars produced at different temperatures were effective in transesterification of soybean oil, showing higher yields compared to conventional methods.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2022)
Article
Energy & Fuels
Supongsenla Ao, Lana A. Alghamdi, Thomas Kress, Manickam Selvaraj, Gopinath Halder, Andrew E. H. Wheatley, Samuel Lalthazuala Rokhum
Summary: The conversion of glycerol to solketal, a fuel additive, was successfully achieved using a sulfonic acid-functionalized aromatic carbonaceous material as a heterogeneous catalyst under microwave irradiation. The optimal glycerol:acetone molar ratio for the acetalization reaction was found to be 1:5, and a catalyst dosage of 8 wt% at 70 degrees C for 10 minutes resulted in a high conversion of bioglycerol with 100% selectivity to solketal. The acetalization reaction had an activation energy of 35.8 kJ mol 1, and the catalyst showed modest loss in activity over six cycles.
Article
Chemistry, Multidisciplinary
Seong-Heon Cho, Sungyup Jung, Young-Kwon Park, Kun-Yi Andrew Lin, Wei-Hsin Chen, Yiu Fai Tsang, Eilhann E. Kwon
Summary: This study focuses on the valorization of swine manure through transesterification and CO2-assisted pyrolysis to maximize the recovery of energy-intensive and value-added products. The lipid fraction in swine manure is converted into biodiesel via thermally induced transesterification, while the residual solid is valorized through pyrolysis. By utilizing CO2 as a co-reactant and a Ni/SiO2 catalyst, the production of syngas is significantly enhanced. Overall, the results show that swine manure can be a useful resource for the production of value-added fuels and chemicals.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2021)
Article
Chemistry, Physical
Ana Paula Soares Dias, Frederico Gomes Fonseca, Monica Catarino, Joao Gomes
Summary: The study focused on glycerin acetylation reaction using heterogeneous acid catalysts at 120 degrees C, showing the importance of catalyst stability, acidity, and porosity on product selectivity and yield.
Article
Green & Sustainable Science & Technology
Valentina Kafkova, Robert Kubinec, Jozef Mikulec, Miroslav Variny, Petra Ondrejickova, Ales Haz, Adriana Brisudova
Summary: With the increasing consumption of coffee beverages, a large amount of food waste-spent coffee grounds (SCG)-is generated. SCG is highly polluting due to the presence of caffeine, tannins, and polyphenols. However, it contains 15% oil on average, making it suitable for biodiesel production.
Article
Green & Sustainable Science & Technology
Andrea Liberale Rispoli, Chiara Tizzano, Nicola Verdone, Valentina Segneri, Giorgio Vilardi
Summary: This study focuses on simulating a waste-to-chemicals plant that converts municipal solid waste into hydrogen, biodiesel, and pyridine. The analysis evaluates different scenarios in terms of technical and economic aspects, including material flows, costs, emissions, and energy efficiency. The results show that by valorizing waste and reducing landfill waste, significant amounts of valuable products can be produced while limiting CO2 emissions.
JOURNAL OF CLEANER PRODUCTION
(2023)
Review
Thermodynamics
Joshua Iseoluwa Orege, Olayinka Oderinde, Ghebretensae Aron Kifle, Adeola Ahmed Ibikunle, Saheed Abiola Raheem, Onome Ejeromedoghene, Emmanuel Sunday Okeke, Olubunmi Michael Olukowi, Odunola Blessing Orege, Emmanuel Oluwaseyi Fagbohun, Taiwo Oladapo Ogundipe, Esther Praise Avor, Omoyemi Oluwatosin Ajayi, Michael Olawale Daramola
Summary: Heterogeneous catalysis provides a viable alternative for low-cost biodiesel production, and catalytic transesterification is considered the most feasible synthesis method. Nine commonly used heterogeneous catalysts have been studied, with a focus on versatile catalysts with high activity and low production cost.
ENERGY CONVERSION AND MANAGEMENT
(2022)
Review
Energy & Fuels
Indira Tobio-Perez, Yosvany Diaz Dominguez, Lizet Rodriguez Machin, Sven Pohl, Magin Lapuerta, Ramon Piloto-Rodriguez
Summary: Biodiesel production has increasingly shifted towards using heterogeneous catalysts derived from biomass, due to their sustainability, economical and eco-friendly nature, ease of recovery, and the potential to eliminate biomass residues. The review discusses various biomass sources as precursors for heterogeneous catalysts, different methods for preparation, their advantages and drawbacks, as well as their performance in biodiesel production. The use of biomass ash or biochar-based catalysts shows promise in biodiesel synthesis, but requires improvements in catalyst load, reaction time, temperature, and methanol-to-oil ratio.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2022)
Review
Engineering, Environmental
Violeta Makareviciene, Egle Sendzikiene, Ieva Gaide
Summary: Recent studies have shown that microalgae hold potential for use in biodiesel synthesis. The use of heterogeneous catalysts and immobilized enzymes can simplify the synthesis process, reduce costs, and improve ester yields. Parameters such as temperature and molar ratio of alcohol to oil have significant effects on the yield under enzymatic catalysis conditions.
FRONTIERS OF ENVIRONMENTAL SCIENCE & ENGINEERING
(2021)
Article
Environmental Sciences
V. Santhana Kumar, Soma Das Sarkar, Basanta Kumar Das, Dhruba Jyoti Sarkar, Pranab Gogoi, Praveen Maurye, Tandrima Mitra, Anjon Kumar Talukder, Satabdi Ganguly, Subir Kumar Nag, Sukham Munilkumar, Srikanta Samanta
Summary: The study demonstrated the use of vermicompost extract as a nutrient source to enhance microalgae growth and lipid production, leading to improved biodiesel quality. This approach shows potential for large-scale biodiesel and bioproduct production.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Chemistry, Analytical
Benan Inan, Anil Tevfik Kocer, Didem Balkanli Ozcimen
Summary: Recently, carbon-based solid acid catalysts have gained attention for biodiesel production. These catalysts can be produced from carbon-based materials, such as biomass wastes, to reduce costs and provide solid waste management. In this study, walnut shell, olive stone, and macroalgae were used to produce biochar-based solid acid catalyst for microalgal biodiesel production. The catalyst with the highest sulfonic acid density and preferable structural properties (from walnut shell carbonized and sulfonated) achieved a biodiesel yield of 82% under certain transesterification parameters. Stability tests also showed that the catalyst could be reused up to the 5th cycle. Overall, this study demonstrates a simple, cost-effective, and environmentally friendly approach for biodiesel production using low-cost feedstock and reusable catalyst.
JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
(2023)
Article
Computer Science, Artificial Intelligence
Anna Fabijanska
ARTIFICIAL INTELLIGENCE IN MEDICINE
(2018)
Article
Agriculture, Multidisciplinary
Anna Fabijanska, Malgorzata Danek
COMPUTERS AND ELECTRONICS IN AGRICULTURE
(2018)
Article
Engineering, Biomedical
Anna Fabijanska
BIOMEDICAL SIGNAL PROCESSING AND CONTROL
(2019)
Article
Automation & Control Systems
Mariusz Chybicki, Wiktor Kozakiewicz, Dawid Sielski, Anna Fabijanska
ENGINEERING APPLICATIONS OF ARTIFICIAL INTELLIGENCE
(2019)
Article
Computer Science, Interdisciplinary Applications
Konrad Olejnik, Anna Fabijanska, Pawel Pelczynski, Anna Stanislawska
COMPUTERS & CHEMICAL ENGINEERING
(2019)
Article
Agriculture, Multidisciplinary
Anna Fabijanska, Malgorzata Danek, Joanna Barniak
Summary: This paper introduces a convolutional neural network method for automatic tree species identification from scanned wood core images, achieving high accuracy in wood patch classification and wood core classification tasks. The model outperformed the state-of-the-art methods and the study also analyzed the impact of model parameters and training settings on performance to ensure the highest recognition rates.
COMPUTERS AND ELECTRONICS IN AGRICULTURE
(2021)
Article
Engineering, Biomedical
Adrian Kucharski, Anna Fabijanska
Summary: The study proposes a fully automatic pipeline combining the watershed algorithm and an encoder-decoder convolutional neural network for corneal endothelial cell segmentation. It achieves promising results on a heterogeneous dataset, outperforming the competitor in terms of cell detection accuracy and other metrics.
BIOMEDICAL SIGNAL PROCESSING AND CONTROL
(2021)
Article
Computer Science, Interdisciplinary Applications
Maciej Czepita, Anna Fabijanska
Summary: An automated pipeline was proposed for analyzing blood flow through retinal vessels to replace time-consuming manual methods. Using convolutional neural networks and full width at half maximum analysis, blood flow was successfully detected in 18 retinal blood vessels. The average difference between manual and automatic measurements was 4.96%, with an average relative error of 8% for single vessel measurements.
COMPUTER METHODS AND PROGRAMS IN BIOMEDICINE
(2021)
Article
Chemistry, Multidisciplinary
Abir Affane, Adrian Kucharski, Paul Chapuis, Samuel Freydier, Marie-Ange Lebre, Antoine Vacavant, Anna Fabijanska
Summary: Accurate liver vessel segmentation is crucial for hepatic diseases, with recent methods using deep learning like U-Net. This study compares 3D U-Net, Dense U-Net, and MultiRes U-Net on the IRCAD dataset, finding that full 3D processing is most accurate overall but slab-based MultiRes U-Net performs best among specific models.
APPLIED SCIENCES-BASEL
(2021)
Article
Computer Science, Artificial Intelligence
Anna Fabijanska, Robert Banasiak
Summary: This study proposes using graph convolutional networks (GCN) to enhance the quality of 3D ECT images by effectively utilizing specific geometrical relationships hidden in unstructured grids, resulting in improved tomographic image quality and spatial resolution.
APPLIED SOFT COMPUTING
(2021)
Article
Multidisciplinary Sciences
Anna Fabijanska, Gabriel D. Cahalan
Summary: This study proposes a new fully automatic pipeline that quantifies the properties of resin ducts and tree-ring boundaries in Pinus trees. A convolutional neural network is used to detect the ducts and boundaries, and a region merging procedure is applied to identify connected components corresponding to successive rings. The proposed method achieves high detection sensitivity and precision for both resin ducts and tree-ring boundaries.
SCIENTIFIC REPORTS
(2023)
Article
Engineering, Biomedical
Adrian Kucharski, Anna Fabijanska
Summary: Currently, corneal endothelial image segmentation relies on convolutional neural networks, but the scarcity of labeled corneal endothelial data due to expensive cell delineation process limits their potential. This study proposes a method of synthesizing cell edges and corresponding images using generative adversarial neural networks, which has not been reported before. Experimental results on three datasets show that our solution provides a cost-effective and diverse source of training data for corneal endothelial image segmentation.
BIOMEDICAL SIGNAL PROCESSING AND CONTROL
(2023)
Article
Computer Science, Information Systems
Anna Fabijanska
Summary: The problem of image segmentation is crucial in computer vision, and deep-learning methods have become dominant in providing solutions. However, they require a large amount of costly training data. This paper proposes a semi-supervised image segmentation method using graph convolutional networks, which achieved good performance in binary and multi-label segmentation tasks.
Article
Computer Science, Interdisciplinary Applications
Anna Fabijanska, Andrew Feder, John Ridge
COMPUTERS & GEOSCIENCES
(2020)
Article
Computer Science, Information Systems
Anna Fabijanska, Szymon Grabowski
Article
Energy & Fuels
Yingna Du, Chen Huang, Wei Jiang, Qiangwei Yan, Yongfei Li, Gang Chen
Summary: In this study, anionic surfactants modified hydrotalcite was used as a flow improver for crude oil under low-temperature conditions. The modified hydrotalcite showed a significant viscosity reduction effect on crude oil. The mechanism of the modified hydrotalcite on viscosity and pour point of crude oil was explored through characterization and analysis of the modified hydrotalcite and oil samples.
Article
Energy & Fuels
Mohammad Saeid Rostami, Mohammad Mehdi Khodaei
Summary: In this study, a hybrid structure, MIL-53(Al)@MWCNT, was synthesized by combining MIL-53(Al) particles and -COOH functionalized multi-walled carbon nanotube (MWCNT). The hybrid structure was then embedded in a polyethersulfone (PES) polymer matrix to prepare a mixed matrix membrane (MMM) for CO2/CH4 and CO2/N2 separation. The addition of MWCNTs prevented MIL-53(Al) aggregation, improved membrane mechanical properties, and enhanced gas separation efficiency.
Article
Energy & Fuels
Yunlong Li, Desheng Huang, Xiaomeng Dong, Daoyong Yang
Summary: This study develops theoretical and experimental techniques to determine the phase behavior and physical properties of DME/flue gas/water/heavy oil systems. Eight constant composition expansion (CCE) tests are conducted to obtain new experimental data. A thermodynamic model is used to accurately predict saturation pressure and swelling factors, as well as the phase boundaries of N2/heavy oil systems and DME/CO2/heavy oil systems, with high accuracy.
Article
Energy & Fuels
Morteza Afkhamipour, Ebad Seifi, Arash Esmaeili, Mohammad Shamsi, Tohid N. Borhani
Summary: Non-conventional amines are being researched worldwide to overcome the limitations of traditional amines like MEA and MDEA. Adequate process and thermodynamic models are crucial for understanding the applicability and performance of these amines in CO2 absorption, but studies on process modeling for these amines are limited. This study used rate-based modeling and Deshmukh-Mather method to model CO2 absorption by DETA solution in a packed column, validated the model with experimental data, and conducted a sensitivity analysis of mass transfer correlations. The study also compared the CO2 absorption efficiency of DETA solution with an ionic solvent [bmim]-[PF6] and highlighted the importance of finding optimum operational parameters for maximum absorption efficiency.
Article
Energy & Fuels
Arastoo Abdi, Mohamad Awarke, M. Reza Malayeri, Masoud Riazi
Summary: The utilization of smart water in EOR operations has gained attention, but more research is needed to understand the complex mechanisms involved. This study investigated the interfacial tension between smart water and crude oil, considering factors such as salt, pH, asphaltene type, and aged smart water. The results revealed that the hydration of ions in smart water plays a key role in its efficacy, with acidic and basic asphaltene acting as intrinsic surfactants. The pH also influenced the interfacial tension, and the aged smart water's interaction with crude oil depended on asphaltene type, salt, and salinity.
Article
Energy & Fuels
Dongao Zhu, Kun Zhu, Lixian Xu, Haiyan Huang, Jing He, Wenshuai Zhu, Huaming Li, Wei Jiang
Summary: In this study, cobalt-based metal-organic frameworks (Co-based MOFs) were used as supports and co-catalysts to confine the NHPI catalyst, solving the leaching issue. The NHPI@Co-MOF with carboxyl groups exhibited stronger acidity and facilitated the generation of active oxygen radicals O2•, resulting in enhanced catalytic activity. This research provides valuable insights into the selection of suitable organic linkers and broadens the research horizon of MOF hybrids in efficient oxidative desulfurization (ODS) applications.
Article
Energy & Fuels
Edwin G. Hoyos, Gloria Amo-Duodu, U. Gulsum Kiral, Laura Vargas-Estrada, Raquel Lebrero, Rail Munoz
Summary: This study investigated the impact of carbon-coated zero-valent nanoparticle concentration on photosynthetic biogas upgrading. The addition of nanoparticles significantly increased microalgae productivity and enhanced nitrogen and phosphorus assimilation. The presence of nanoparticles also improved the quality of biomethane produced.
Article
Energy & Fuels
Yao Xiao, Asma Leghari, Linfeng Liu, Fangchao Yu, Ming Gao, Lu Ding, Yu Yang, Xueli Chen, Xiaoyu Yan, Fuchen Wang
Summary: Iron is added as a flocculant in wastewater treatment and the hydrothermal carbonization (HTC) of sludge produces wastewater containing Fe. This study investigates the effect of aqueous phase (AP) recycling on hydrochar properties, iron evolution and environmental assessment during HTC of sludge. The results show that AP recycling process improves the dewatering performance of hydrochar and facilitates the recovery of Fe from the liquid phase.
Article
Energy & Fuels
He Liang, Tao Wang, Zhenmin Luo, Jianliang Yu, Weizhai Yi, Fangming Cheng, Jingyu Zhao, Xingqing Yan, Jun Deng, Jihao Shi
Summary: This study investigated the influence of inhibitors (carbon dioxide, nitrogen, and heptafluoropropane) on the lower flammability limit of hydrogen and determined the critical inhibitory concentration needed for complete suppression. The impact of inhibitors on explosive characteristics was evaluated, and the inhibitory mechanism was analyzed with chemical kinetics. The results showed that with the increase of inhibitor quantity, the lower flammability limit of hydrogen also increased. The research findings can contribute to the safe utilization of hydrogen energy.
Article
Energy & Fuels
Zonghui Liu, Zhongze Zhang, Yali Zhou, Ziling Wang, Mingyang Du, Zhe Wen, Bing Yan, Qingxiang Ma, Na Liu, Bing Xue
Summary: In this study, high-performance solid catalysts based on phosphotungstic acid (HPW) supported on Zr-SBA-15 were synthesized and evaluated for the one-pot conversion of furfural (FUR) to γ-valerolactone (GVL). The catalysts were characterized using various techniques, and the ratio of HPW and Zr was found to significantly affect the selectivity of GVL. The HPW/Zr-SBA-15 (2-4-15) catalyst exhibited the highest GVL yield (83%) under optimized reaction conditions, and it was determined that a balance between Bronsted acid sites (BAS) and Lewis acid sites (LAS) was crucial for achieving higher catalytic performance. The reaction parameters and catalyst stability were also investigated.
Article
Energy & Fuels
Michael Stoehr, Stephan Ruoff, Bastian Rauch, Wolfgang Meier, Patrick Le Clercq
Summary: As part of the global energy transition, an experimental study was conducted to understand the effects of different fuel properties on droplet vaporization for various conventional and alternative fuels. The study utilized a flow channel to measure the evolution of droplet diameters over time and distance. The results revealed the temperature-dependent effects of physical properties, such as boiling point, liquid density, and enthalpy of vaporization, and showed the complex interactions of preferential vaporization and temperature-dependent influences of physical properties for multi-component fuels.
Article
Energy & Fuels
Yuan Zhuang, Ruikang Wu, Xinyan Wang, Rui Zhai, Changyong Gao
Summary: Through experimental validation and optimization of the chemical kinetic model, it was found that methanol can accelerate the oxidation reaction of ammonia, and methanol can be rapidly oxidized at high concentration. HO2 was found to generate a significant amount of OH radicals, facilitating the oxidation of methanol and ammonia. Rating: 7.5/10.
Article
Energy & Fuels
Radwan M. EL-Zohairy, Ahmed S. Attia, A. S. Huzayyin, Ahmed I. EL-Seesy
Summary: This paper presents a lab-scale experimental study on the impact of diethyl ether (DEE) as an additive to waste cooking oil biodiesel with Jet A-1 on combustion and emission features of a swirl-stabilized premixed flame. The addition of DEE to biodiesel significantly affects the flame temperature distribution and emissions. The W20D20 blend of DEE, biodiesel, and Jet A-1 shows similar flame temperature distribution to Jet A-1 and significantly reduces UHC, CO, and NOx emissions compared to Jet A-1.
Article
Energy & Fuels
Jiang Bian, Ziyuan Zhao, Yang Liu, Ran Cheng, Xuerui Zang, Xuewen Cao
Summary: This study presents a novel method for ammonia separation using supersonic flow and develops a mathematical model to investigate the condensation phenomenon. The results demonstrate that the L-P nucleation model accurately characterizes the nucleation process of ammonia at low temperatures. Numerical simulations also show that increasing pressure and concentration can enhance ammonia condensation efficiency.
Article
Energy & Fuels
Shiyuan Pan, Xiaodan Shi, Beibei Dong, Jan Skvaril, Haoran Zhang, Yongtu Liang, Hailong Li
Summary: Integrating CO2 capture with biomass-fired combined heat and power (bio-CHP) plants is a promising method for achieving negative emissions. This study develops a reliable data-driven model based on the Transformer architecture to predict the flowrate and CO2 concentration of flue gas in real time. The model validation shows high prediction accuracy, and the potential impact of meteorological parameters on model accuracy is assessed. The results demonstrate that the Transformer model outperforms other models and using near-infrared spectral data as input features improves the prediction accuracy.
