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
Green & Sustainable Science & Technology
Adeyinka Sikiru Yusuff, Afeez Olayinka Gbadamosi, Neeraj Atray
Summary: In this study, used cooking oil was successfully converted to fatty acid methyl ester using a zeolite-based eggshell composite catalyst. The optimization of the methanolysis process yielded a maximum FAME content of 93.7%. The results demonstrated that the composite catalyst had excellent reusability.
Article
Green & Sustainable Science & Technology
Adeyinka S. Yusuff, Aman K. Bhonsle, Jayati Trivedi, Dinesh P. Bangwal, Lok P. Singh, Neeraj Atray
Summary: Coal fly ash-zinc oxide composite (CFA/ZnO) was developed and applied as a catalyst in transesterification of used cooking oil (UCO). After optimization, the catalyst showed high productivity in biodiesel synthesis and demonstrated good stability for multiple cycles of reuse.
Article
Green & Sustainable Science & Technology
Zayed Al-Hamamre, Arwa Sandouqa, Basel Al-Saida, Reyad A. Shawabkeh, Mohammad Alnaief
Summary: A solid heterogeneous catalyst was prepared by impregnation of oil shale ash with KNO3 and subsequent calcination. The effects of different preparation conditions on waste cooking oil to biodiesel conversion were investigated. The characterization of the catalyst and the quantification of the produced biodiesel were performed using various analytical techniques.
Article
Engineering, Environmental
Adeyinka Sikiru Yusuff, Afeez Olayinka Gbadamosi, Lekan Taofeek Popoola
Summary: This study developed a new eco-friendly solid catalyst from anthill-zinc modification for methanolysis of low-grade feedstock to produce biodiesel. The optimized conditions for the reaction resulted in a high biodiesel yield of 83.16%, showing good agreement with the predicted value. The catalyst exhibited better stability after being regenerated and reused for six cycles, indicating its potential for economical biofuel production from waste products.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Chemistry, Physical
Sumaiya Zainal Abidin, Misbahu Ladan Mohammed, Basudeb Saha
Summary: This study developed a novel two-stage method for synthesizing biodiesel from used cooking oil using ion exchange resins as catalysts. The best catalytic performance was achieved using Purolite D5081 resin for esterification and Diaion PA306s resin for transesterification. The optimized reaction conditions resulted in a triglyceride conversion of approximately 75%, and the Diaion PA306s catalyst showed good reusability without losing its activity.
Article
Green & Sustainable Science & Technology
Shaige Xia, Yongjie Hu, Chao Chen, Junyu Tao, Beibei Yan, Wanqing Li, Guangbin Zhu, Zhanjun Cheng, Guanyi Chen
Summary: This study investigates the electrolytic transesterification of waste cooking oil (WCO) using reusable magnetic waste shells derived Co/Fe-Ca based catalysts for biodiesel production. The reaction conditions were optimized using response surface methodology, resulting in high fatty acid methyl ester (FAME) content and improved energy efficiency. The experimental results show that this method holds promise for sustainable biodiesel production and disposal of WCO.
Article
Environmental Sciences
Hantoro Satriadi, Isdayana Yogi Pratiwi, Malikhatul Khuriyah, Widayat, Hadiyanto, Jedy Prameswari
Summary: The study aimed to develop a sustainable Ni/Zeolite catalyst derived from geothermal solid waste for waste cooking oil processing. By investigating the effects of catalyst concentration and operation temperature on transesterification process, the optimal conditions for biodiesel production from waste cooking oil were determined. Results showed that the synthesized Ni/Zeolite catalyst had granular shape, crystalline structure, increased surface area, and pore volume. Highest biodiesel yield was achieved at 3% w/w Ni/Zeolite catalyst addition and 60 degrees C operating temperature. The synthesized catalyst showed a decrease in biodiesel yield after three cycles of reuse.
Article
Environmental Sciences
Jedy Prameswari, Widayat Widayat, Luqman Buchori, Hadiyanto Hadiyanto
Summary: The aim of this research was to develop a bifunctional catalyst made of iron sand and different CaO2 sources for biodiesel production. It was found that CaCO3 was the best source of CaO2, and the Fe/Ca ratio of 1:4 resulted in the highest biodiesel yield.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Energy & Fuels
Fekadu Ashine, Zebene Kiflie, Sundramurthy Venkatesa Prabhu, Belachew Zegale Tizazu, Venkatramanan Varadharajan, Manivasagan Rajasimman, Sang-Woo Joo, Yasser Vasseghian, Mani Jayakumar
Summary: The present study optimized the process of biodiesel production from Argemone mexicana oil using calcium oxide as a catalyst derived from chicken eggshells. The catalyst was characterized and the parameters were optimized through response surface methodology, resulting in a high yield of biodiesel. Non-statistical techniques were used to analyze the optimal values, and the obtained biodiesel was characterized using spectroscopic techniques.
Article
Energy & Fuels
Matheus Arrais Goncalves, Erica Karine Lourenco Mares, Jose Roberto Zamian, Geraldo Narciso da Rocha Filho, Leyvison Rafael Vieira da Conceicao
Summary: In this study, a heterogeneous magnetic acid catalyst MoO3/SrFe2O4 was synthesized and applied in transesterification of waste cooking oil, providing an environmentally friendly approach to biodiesel production. By developing a mathematical model and optimizing reaction conditions, a high ester conversion rate of 95.4% was achieved with excellent catalyst reusability and stability demonstrated through five runs.
Article
Chemistry, Multidisciplinary
F. Nadeem, I. A. Bhatti, A. Ashar, M. Yousaf, M. Iqbal, M. Mohsin, J. Nisar, N. Tamam, N. Alwadai
Summary: The utilization of eggshell-derived MM-CaO catalyst for the production of biodiesel from waste cooking oil has been studied, showing that high yields can be achieved under specific conditions.
ARABIAN JOURNAL OF CHEMISTRY
(2021)
Article
Green & Sustainable Science & Technology
Harendra Kumar, A. Annam Renita, S. Anuradha Jabasingh
Summary: This research article focuses on synthesis of a stable, cost effective and highly active catalyst for transesterification of preutilized cooking oil into biodiesel. Through response surface methodology, the study investigated the effects of various process parameters on biodiesel yield, achieving 72% yield under optimized conditions. The study has successfully demonstrated the feasibility of using preutilized cooking oil to produce biodiesel with the synthesized catalyst.
ENVIRONMENTAL PROGRESS & SUSTAINABLE ENERGY
(2021)
Article
Green & Sustainable Science & Technology
Babak Aghel, Ashkan Gouran, Ehsan Parandi, Binta Hadi Jumeh, Hamid Rashidi Nodeh
Summary: This research successfully improved biodiesel production from waste cooking oil by using a GO@MgO nanocatalyst and optimizing the reaction parameters, resulting in higher purity and yield of biodiesel.
Article
Energy & Fuels
Naeemah A. Ibrahim, Umer Rashid, Balkis Hazmi, Bryan R. Moser, Fahad A. Alharthi, Samuel Lalthazuala Rokhum, Chawalit Ngamcharussrivichai
Summary: A magnetic bifunctional nanocatalyst supported on activated carbon was synthesized and used for the catalytic transesterification of waste cooking oil. The catalyst showed significant acidity and basicity, which contributed to a high biodiesel yield. It also exhibited magnetism, facilitating the recovery of the catalyst from the reaction mixture. Reusability experiments demonstrated the catalyst's high stability, and the biodiesel produced met the American biodiesel standard.
Article
Chemistry, Applied
Ismael Pellejero, Alberto Clemente, Santiago Reinoso, Alfonso Cornejo, Alberto Navajas, Jose J. Vesperinas, Miguel A. Urbiztondo, Luis M. Gandia
Summary: This study presents an innovative fabrication protocol for affordable, custom-designed photocatalytic microreactors, achieving reproducible and controllable incorporation and immobilization of catalysts. The fabricated microreactors showed excellent photocatalytic performance in a model reaction, demonstrating the effectiveness of the proposed fabrication method.
Article
Chemistry, Multidisciplinary
Oscar de la Iglesia, Miryan Sarango, Mikel Munarriz, Magdalena Malankowska, Alberto Navajas, Luis M. Gandia, Joaquin Coronas, Carlos Tellez
Summary: The mesoporous material Sn-In-MCM-41 was synthesized and used as a catalyst for the transformation of sugars to methyl lactate (ML). The Sn-In-MCM-41 catalyst showed better performance compared to Sn-MCM-41 and In-MCM-41 catalysts, with higher yields and good reusability. Furthermore, the use of Sn-In-MCM-41 also reduced environmental impacts compared to Sn-MCM-41.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2022)
Article
Engineering, Chemical
Ines Reyero, Luis M. Gandia, Gurutze Arzamendi
Summary: The sound propagation speed measurement method is used to monitor triglyceride ethanolysis under various reaction conditions. Experimental results show a slight increase in sound propagation speed during the reaction, but accurately estimating the sound speed at the ethanol/oil interface remains challenging. Despite this, the method successfully predicts the evolution of the reaction, but shows deviations in estimating the conversion rate at the beginning of the reaction.
Article
Energy & Fuels
Miguel M. Arana, Ricardo San Martin, Jose Carlos Urroz, Pedro M. Dieguez, Luis M. Gandia
Summary: This study analyzed the influence of fuel type (gasoline or hydrogen) on the sound levels produced by a vehicle with an internal combustion engine. It was found that there is a slight increase in noise level outside the vehicle when using hydrogen as fuel, mainly in the 500Hz band. This may be attributed to the higher reactivity of hydrogen.
Article
Chemistry, Applied
Tomas Cordero-Lanzac, Adrian Ramirez, Alberto Navajas, Lieven Gevers, Sirio Brunialti, Luis M. Gandia, Andres T. Aguayo, S. Mani Sarathy, Jorge Gascon
Summary: This study provides a comprehensive analysis of the process of converting CO2 into green methanol, including kinetic analysis of catalysts, process simulation, techno-economic assessment, and life cycle evaluation. The results indicate that using renewable energy is crucial for CO2 abatement and profitable methanol production.
JOURNAL OF ENERGY CHEMISTRY
(2022)
Article
Biochemistry & Molecular Biology
Elsa Autor, Alfonso Cornejo, Fernando Bimbela, Maitane Maisterra, Luis M. Gandia, Victor Martinez-Merino
Summary: Lignocellulosic residues have the potential for high value-added products, and optimized extraction methods can yield phenolic compounds with antioxidant properties. In this study, poplar bark was sequentially extracted with five solvents, with methanol extracts showing the highest phenolic content and antioxidant activity.
Article
Thermodynamics
Alberto Navajas, Teresa Mendiara, Luis M. Gandia, Alberto Abad, Francisco Garcia-Labiano, Luis F. de Diego
Summary: Power-to-methane (PtM) systems can smooth out fluctuations in renewable energy supply by storing surplus energy as methane. By combining hydrogen and carbon dioxide, these systems can produce methane through a chemical reaction. The study found that PtM systems based on CO2 from biomass have the potential to reduce global warming potential and effectively remove CO2 from the atmosphere through negative emissions.
ENERGY CONVERSION AND MANAGEMENT
(2022)
Article
Chemistry, Physical
Alejandro Ibanez-de-Garayo, Mikel Imizcoz, Maitane Maisterra, Fernando Almazan, Diego Sanz, Fernando Bimbela, Alfonso Cornejo, Ismael Pellejero, Luis M. M. Gandia
Summary: Microstructured reactors (MSRs) are suitable for demanding heterogeneous catalysis due to their small channel dimensions, which enhance mass and heat transport. This article presents a fabrication method for silicone monolithic microreactors using fused filament 3D printing. The microreactors were tested for different catalytic applications and showed promising performance under various reaction conditions.
Article
Energy & Fuels
Jose Carlos Urroz, Pedro M. Dieguez, Gurutze Arzamendi, Miguel Arana, Luis M. Gandia
Summary: In this study, methane, carbon monoxide, hydrogen, and binary mixtures of these gases were considered as fuels for a Volkswagen 1.4 L spark-ignition engine. The engine showed similar performance regardless of the gaseous fuel used when the air-fuel equivalence ratio (lambda) was the same. Methane and methane-rich mixtures allowed operating the engine at close to stoichiometric conditions, while hydrogen and hydrogen-rich mixtures could only be used in a very fuel-lean region. A thermodynamic combustion model was developed to understand the trends set by the fuels.
Article
Chemistry, Physical
Vigni V. V. Gonzalez-Rangulan, Ines Reyero, Fernando Bimbela, Francisca Romero-Sarria, Marco Daturi, Luis M. M. Gandia
Summary: Renewed interest in CO2 methanation is due to its role within the framework of the Power-to-Methane processes. The study investigated the influence of different supports on the performance of Ni-based catalysts for CO2 methanation. The results showed significant differences in Ni dispersion, reducibility, basic properties, and catalytic activity among the catalysts. In addition, operando FTIR spectroscopy suggested that CO2 methanation follows the formate pathway over the catalysts under consideration.
Article
Chemistry, Multidisciplinary
Fernando Almazan, Marta Lafuente, Amaya Echarte, Mikel Imizcoz, Ismael Pellejero, Luis M. Gandia
Summary: This study reports the preparation of MOF-derived Ru@ZrO2 catalysts by thermal treatment of zirconium-based MOF UiO-66 with ruthenium moieties. The catalysts showed high activity for the hydrogenation of CO2 to CH4 with high selectivity. The crystalline phase of ZrO2 significantly influenced the selectivity towards CH4.
CHEMISTRY-SWITZERLAND
(2023)
Article
Engineering, Chemical
Itsaso Echarri, Clara Casado-Coterillo, Marta Rumayor, Alberto Navajas, Luis M. Gandia
Summary: The environmental impacts of chitosan (CS) and polymeric poly(1-trimethylsilyl-1-propyne) (PTMSP) mixed-matrix membranes (MMMs) for CO2 separation were compared using life cycle assessment (LCA). CS membranes were enhanced with an ionic liquid of non-reported toxicity to improve mechanical strength, while different fillers were used to enhance mechanical and functional properties. Results showed that ETS-10/IL-CS had the highest impacts due to lower permeability, while the polymeric membrane had the overall highest impacts. Biopolymer and polymer manufacture had the largest contribution to the total environmental impacts of each membrane. To decrease impacts below fossil polymer membranes with the same CO2 permeation flux, an improvement of permeabilities by factors of 1000, 100, and 2 would be needed for the ETS-10, ZIF-8, and HKUST-1/IL-CS MMMs, respectively.
CHEMICAL ENGINEERING & TECHNOLOGY
(2023)
Article
Chemistry, Multidisciplinary
Monica Paesa, Fernando Almazan, Cristina Yus, Victor Sebastian, Manuel Arruebo, Luis M. Gandia, Santiago Reinoso, Ismael Pellejero, Gracia Mendoza
Summary: This study investigates the antimicrobial performance of polyoxometalate-stabilized gold nanoparticles against Escherichia coli and Staphylococcus aureus, finding that one particular composite exhibits excellent bactericidal efficiency without harming mammalian cells.
Article
Chemistry, Physical
Alfonso Cornejo, Ines Reyero, Idoia Campo, Gurutze Arzamendi, Luis M. Gandia
Summary: This study monitored the glycerol etherification reaction using gas chromatography (GC) and (1)H nuclear magnetic resonance (H-1 NMR) techniques. A quantitative analysis method based on H-1 NMR was presented, reducing analysis time and relative error compared to GC-based methods. The experimental results showed the influence of catalyst concentration and TBA/glycerol ratio on the reaction and highlighted the difficulties in achieving high selectivities and yields.
Article
Chemistry, Multidisciplinary
Yanet Villasana, Sabino Armenise, Javier Abrego, Maria Atienza-Martinez, Karina Hablich, Fernando Bimbela, Alfonso Cornejo, Luis M. Gandia
Summary: Ecuador, a leading producer of cocoa beans, recognizes the strategic and socioeconomic value of managing and valorizing the vast amount of waste generated by this industry. A low-cost pyrolysis route was explored to extract chemical products from cocoa pod husks, resulting in increased yield and improved quality of bio-oil through downstream catalytic processing.
