Article
Thermodynamics
Nur Sulihatimarsyila Abd Wafti, Robiah Yunus, Harrison Lik Nang Lau, Thomas Shean Yaw Choong, Suraini Abd-Aziz
Summary: The application of enzymes in the organic synthesis of polyol esters for biolubricants is explored in this study. TMP ester was synthesized from HO-PME through enzymatic transesterification. This research demonstrates that only 3% enzyme dosage is needed to achieve the highest triester yield of 82% without purification. The enzymatically synthesized TMP ester exhibits excellent lubricant properties.
Article
Agricultural Engineering
Brandon Ywe Soong Ng, Hwai Chyuan Ong, Harrison Lik Nang Lau, Nor Shafizah Ishak, Ashraf Elfasakhany, Hwei Voon Lee
Summary: In this study, PFAD was utilized as a feedstock for biolubricant base oil production, and an efficient esterification process was conducted using a solid acid catalyst. The resulting PFAD-NPG ester met the requirements of JASO M345:2018, and the catalyst demonstrated good reusability after 5 cycles.
INDUSTRIAL CROPS AND PRODUCTS
(2022)
Article
Green & Sustainable Science & Technology
Madhavi Perera, Jinyong Yan, Li Xu, Min Yang, Yunjun Yan
Summary: In recent years, vegetable oils and their derivatives have gained attention as environmentally friendly lubricants due to their biodegradability, renewable nature, and superior lubrication performance compared to fossil commercial lubricants. This review examines the zero-waste approach of enzymatic conversion for bio-lubricant production using non-edible oil and agro-industrial waste, while also exploring the use of lipase as a biocatalyst in place of chemically mediated transesterification processes. The article provides information on the types of lipases used, their optimal reaction conditions, and the maximum product yields, as well as highlights the physicochemical properties and enhanced application fields of bio-lubricants.
JOURNAL OF CLEANER PRODUCTION
(2022)
Article
Agricultural Engineering
Reda Z. K. Hussein, Nahed K. Attia, Mai K. Fouad, Shakinaz T. ElSheltawy
Summary: Waste cooking oil was used to synthesize biolubricant, with optimized conditions achieving the highest conversion rate. The structural and thermal properties of the produced biolubricant were tested, showing compliance with ISO VG68 viscosity grade and better low temperature applicability. Simulation results demonstrated the industrial applicability of the studied biolubricant production process using different models on Aspen HYSYS program version 9.
BIOMASS & BIOENERGY
(2021)
Article
Energy & Fuels
Majd Ahmed Jumaah, Firas Layth Khaleel, Nadia Salih, Jumat Salimon
Summary: This study synthesized renewable fuels and biodegradable ester-based biolubricants through esterification reaction and determined the optimal synthesis conditions. The results showed that the reaction temperature had the most significant effect on the yield of the esterification reaction. The synthesized ester-based biolubricants were suitable for grease and bearing lubricant applications.
BIOMASS CONVERSION AND BIOREFINERY
(2022)
Article
Thermodynamics
Tao Jia, Shengshan Bi, Jiangtao Wu, Weixue Jiang, Panyuan Li
Summary: This study measured the solubilities of R1234yf in different base oils and correlated the experimental data using mathematical models. The results showed that the errors between the experimental and calculated values are relatively small in different base oil systems.
INTERNATIONAL JOURNAL OF REFRIGERATION
(2021)
Article
Green & Sustainable Science & Technology
Jun Mann Loh, Amelia, Wail Gourich, Chien Lye Chew, Cher Pin Song, Eng-Seng Chan
Summary: This study demonstrated an economical and sustainable enzymatic process for converting sludge palm oil into high-quality biodiesel using a low-cost liquid lipase. The results showed that a high ester content of approximately 94 wt% crude biodiesel could be produced under low-input process conditions with a low enzyme concentration and methanol-to-oil molar ratio at a low operating temperature.
Article
Chemistry, Applied
Ji Won Kim, Byung Hee Kim, Yangha Kim, Moon-Won Lee, Dong Joong Im, In-Hwan Kim
Summary: Neopentyl glycol (NPG) diester is a biodegradable lubricant suitable for low-temperature environments, synthesized effectively with immobilized lipase. The Eversa immobilized lipase demonstrated the highest efficiency for NPG diester synthesis.
JOURNAL OF THE AMERICAN OIL CHEMISTS SOCIETY
(2021)
Article
Chemistry, Applied
Keysson V. Fernandes, Elisa D. C. Cavalcanti, Eliane P. Cipolatti, Erika C. G. Aguieiras, Martina C. C. Pinto, Fernanda A. Tavares, Priscila R. da Silva, Roberto Fernandez-Lafuente, Sara Arana-Pena, Jose Carlos Pinto, Charles L. B. Assuncao, Jose Andre C. da Silva, Denise M. G. Freire
Summary: This study successfully synthesized biolubricants from by-products of soybean oil processing using the lipase from Candida rugosa, showing high conversion rates and improved efficiency through immobilization. The products demonstrated good lubricant properties, indicating a potential environmentally friendly alternative to petroleum-based lubricants.
Article
Biotechnology & Applied Microbiology
Nur Sulihatimarsyila Abd Wafti, Robiah Yunus, Harrison Lik Nang Lau, Thomas Choong Shean Yaw, Suraini Abdul Aziz
Summary: The present study investigated the effects of three commercial immobilized lipases on the production of TMP esters from HO-PME. Novozyme 435 showed the highest yield of TMP ester under specific conditions and exhibited good lubrication properties suitable for biolubricant production.
BIOPROCESS AND BIOSYSTEMS ENGINEERING
(2021)
Article
Multidisciplinary Sciences
Kian Rokni, Mostafa Mostafaei, Masoud Dehghani-Soufi, Danial Kahrizi
Summary: Microwave irradiation was used to enhance the reaction for producing bio-lubricant from camelina oil, resulting in a high reaction yield. The physicochemical properties of the purified product met the standards of base oil.
SCIENTIFIC REPORTS
(2022)
Article
Materials Science, Multidisciplinary
Yi Xu, Jing Guo, Yuanfa Liu, Qiang Yang, Xin Zhang, Fucheng Guan
Summary: A new wet spinning strategy using esterification reaction with polyols as in-situ crosslinking agents through acid catalysis is proposed to improve the strength and hydrophobicity of alginate-based fibers. The esterification reaction was confirmed by FTIR and NMR, and XRD analysis showed increased crystallinity of the fibers. Mechanical property tests demonstrated improved modulus and strength, while the contact angle also increased. The type of polyol used had significant effects on the properties of the fibers.
MATERIALS & DESIGN
(2022)
Article
Agricultural Engineering
Milson S. Barbosa, Cintia C. C. Freire, Luma M. S. Brandao, Ernandes B. Pereira, Adriano A. Mendes, Matheus M. Pereira, Alvaro S. Lima, Cleide M. F. Soares
Summary: This study presents a biorefinery approach for producing biolubricants by valorising solid waste from Moringa oleifera Lam oil extraction. The immobilisation of Candida rugosa lipase on silica-WMO hybrid matrix showed promising results with high conversion rates and retained activity after multiple cycles. The isoamyl esters derived from this process exhibited physicochemical properties similar to commercial lubricants, showcasing potential as eco-friendly alternatives for hydraulic machinery.
INDUSTRIAL CROPS AND PRODUCTS
(2021)
Article
Energy & Fuels
Mamdouh S. Elmelawy, Asmaa El-Meligy, Hussien A. Mawgoud, Asmaa S. Morshedy, Samia A. Hanafy, Ibrahim El-tantawy El-sayed
Summary: In this study, trimethylolpropane triesters were successfully synthesized through a two-step transesterification process using oleic acid as a precursor. The produced triesters can serve as biodegradable lubricant base oil substitutes for mineral oils, leading to a significant reduction in environmental pollution. The effects of various operating parameters on the reaction were investigated, and the optimal conditions were determined. The synthesized triesters exhibited a suitable composition for their desired application.
BIOMASS CONVERSION AND BIOREFINERY
(2023)
Article
Chemistry, Multidisciplinary
Eko K. Sitepu, Sumi Hudiyono, Zubaidah A. P. Sinaga, Rara Pramudhita, Desmita Desmita, Yose F. Ginting, Firman Sebayang, Juliati Br. Tarigan
Summary: Currently, the esterification production of IPM or IPP utilizes acid substances as catalysts under high temperatures and pressures, requiring additional postproduction processes and increasing production costs. In contrast, microwave enzymatic esterification is a simple and fast method that consumes less energy and is more energy efficient.
Article
Biotechnology & Applied Microbiology
Ronaldo Rodrigues de Sousa, Martina Costa Cerqueira Pinto, Erika Cristina Goncalves Aguieiras, Eliane Pereira Cipolatti, Evelin Andrade Manoel, Ayla Sant'Ana da Silva, Jose Carlos Pinto, Denise Maria Guimaraes Freire, Viridiana Santana Ferreira-Leitao
Summary: When selecting immobilized lipase for ester synthesis, factors such as cost, conversion rate, and reusability should be considered. Increasing the biocatalyst's loading can improve reusability of the lipase, but not in strict proportion, leading to a balance between the lowest biocatalyst loading and the lowest cost per batch.
BIOPROCESS AND BIOSYSTEMS ENGINEERING
(2022)
Review
Biotechnology & Applied Microbiology
Priscila Esteves Faria, Aline M. Castro, Denise Maria Guimaraes Freire, Rafael D. Mesquita
Summary: This article elucidates the details of isomer production of 2,3-butanediol and acetoin, non-oxidative metabolism products of microorganisms, through bioinformatics analysis and compares the stereo-triads of other enzymes. These results are of great importance for understanding the biosynthesis and industrial production of BD/AC.
CRITICAL REVIEWS IN BIOTECHNOLOGY
(2023)
Article
Polymer Science
Martina C. C. Pinto, Isabelly Sousa, Luciana Dutra, Stefanni S. Everton, Jaqueline Greco-Duarte, Eliane Pereira Cipolatti, Erika Cristina G. Aguieiras, Evelin A. Manoel, Denise Maria G. Freire, Jose Carlos Pinto
Summary: This study focuses on developing new enzymatic biocatalysts for esterification and transesterification reactions by synthesizing polymer supports with distinct functional compounds. Different polymerization strategies were used to synthesize the supports, leading to particles with high surface areas and highly active biocatalysts that achieved esterification conversions above 80%. The new functional matrices showed great potential for use in the biodiesel industry based on their performance in esterification and transesterification reactions.
JOURNAL OF APPLIED POLYMER SCIENCE
(2022)
Article
Biochemical Research Methods
Fabiana Luisa Silva, Jadina Carina Pinheiro, Monique Juna Lopes Leite, Mariane Carolina Proner, Anderson Felipe Viana da Silva, Denise Maria Guimaraes Freire, Helen Treichel, Alan Ambrosi, Marco Di Luccio
Summary: This study investigates the feasibility of extracting 2,3-butanediol (2,3-BDO) from model aqueous solutions using aqueous two-phase systems (ATPS). The results suggest that ATPS based on PEG-salt has a high potential for industrial application, as it allows for the recovery and purification of 2,3-BDO produced from microbiological synthesis under mild conditions and a simple process.
PREPARATIVE BIOCHEMISTRY & BIOTECHNOLOGY
(2022)
Article
Green & Sustainable Science & Technology
Luciana da Silva Dutra, Martina Costa Cerqueira Pinto, Eliane Pereira Cipolatti, Erika Cristina G. Aguieiras, Evelin Andrade Manoel, Jaqueline Greco-Duarte, Denise Maria Guimaraes Freire, Jose Carlos Pinto
Summary: The study conducted an in-depth analysis of global scientific production on biodiesel production through immobilized enzymes, revealing widespread international collaboration and interest in this field, with China, Brazil, and India emerging as key countries in research and development.
RENEWABLE & SUSTAINABLE ENERGY REVIEWS
(2022)
Article
Engineering, Chemical
Stefanni S. Everton, Isabelly Sousa, Luciana da Silva Dutra, Eliane Pereira Cipolatti, Erika Cristina G. Aguieiras, Evelin Andrade Manoel, Jaqueline Greco-Duarte, Martina C. C. Pinto, Denise Maria Guimaraes Freire, Jose Carlos Pinto
Summary: The research on enzymatic production of biodiesel in Brazil has made progress, with most studies conducted in the southeast region, while biodiesel production is concentrated in the middle western states. The use of biomass as feedstock or raw material for biocatalysts can make the production of biodiesel more sustainable and economically viable.
BRAZILIAN JOURNAL OF CHEMICAL ENGINEERING
(2023)
Article
Chemistry, Applied
Erika C. G. Aguieiras, Kevin Enrick A. de Abreu, Renata A. Oliveira, Joao M. A. R. Almeida, Denise M. G. Freire
Summary: Distillers corn oil (DCO) was enzymatically converted into fatty acid ethyl esters (FAEE) in this study. Strategies such as ethanol stepwise addition, consecutive reactions, and mixture of enzymes were evaluated to improve the ester content. The concept of combi-lipases was also evaluated for the first time. The use of DCO enables the integration of corn ethanol and biodiesel production, which is of logistic, environmental, and economic relevance.
JOURNAL OF THE AMERICAN OIL CHEMISTS SOCIETY
(2022)
Article
Biotechnology & Applied Microbiology
Larissa Zambe Pinheiro, Fellipe Francisco da Silva, Maria Sandra Ramos Queiroz, Erika Cristina Goncalves Aguieiras, Eliane Pereira Cipolatti, Aline Souza da Silva, Jonathan Bassut, Lucy Seldin, Denise Oliveira Guimaraes, Denise Maria Guimaraes Freire, Rodrigo Octavio Mendonca Alves de Souza, Ivana Correa Ramos Leal
Summary: Oranges are widely consumed in Brazil with a production of over 80 million tons per year. This study explores the use of orange residues for enzyme production, specifically focusing on the pyridoxal 5-phosphate (PLP)-dependent enzyme group. The use of solid-state fermentation with endophytic microorganisms proved to be an effective and cost-efficient approach for enzyme production.
BIOCATALYSIS AND AGRICULTURAL BIOTECHNOLOGY
(2023)
Article
Biotechnology & Applied Microbiology
Gabriela C. Breda, Priscila E. Faria, Yuri S. Rodrigues, Priscila B. Pinheiro, Maria Clara R. Nucci, Pau Ferrer, Denise M. G. Freire, Rodrigo V. Almeida, Rafael D. Mesquita
Summary: ProspectBIO is a new software for bioprospecting that can efficiently find non-annotated enzyme sequences by searching for homologs in genomes. Using this software, a novel lipase-encoding gene from Ustilago hordei was discovered and successfully expressed in yeast, resulting in an active enzyme.
Article
Biotechnology & Applied Microbiology
Ana Cristina Pantoja Simoes, Rodrigo Pimentel Fernandes, Maysa Silva Barreto, Gabriela Bouca Marques da Costa, Mateus Gomes de Godoy, Denise Maria Guimaraes Freire, Nei Pereira Jr
Summary: This study aims to monitor the growth of Methylobacterium organophilum in a methanol culture medium and investigate its potential in producing commercially valuable compounds. The findings demonstrate the bacterium's ability to produce compounds of interest and its potential application in biorefineries.
FOOD TECHNOLOGY AND BIOTECHNOLOGY
(2022)
Article
Materials Science, Multidisciplinary
Tatiane S. Ribeiro, Ezaine C. C. Torquato, Eliane P. Cipolatti, Martina C. C. Pinto, Evelin A. Manoel, Monica R. C. Marques, Denise M. G. Freire, Jose Carlos Pinto, Luciana C. Costa
Summary: This study investigated the impact of textural properties of supports on the immobilization of lipases and the performance of biocatalysts. The results showed that increasing pore diameters of particles led to higher immobilization yields and the hydrolytic activities of the biocatalysts were influenced by the average pore diameter, porosity, and specific surface area of the supports.
MATERIALS RESEARCH-IBERO-AMERICAN JOURNAL OF MATERIALS
(2022)
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.
