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article

Continuous production of biodiesel from soybean flakes by extraction coupling with transesterification under supercritical conditions: Original research article

Dan Zhou, Li Qi, Bao-Quan Qiao, Qin-Qin Xu, more

The Journal of Supercritical Fluids > 2017 > 120 > P2 > 395-402

Biodiesel is regarded as one of the most promising alternatives for petroleum diesel. In this study, biodiesel continuous production with three kinds of reactor which are straight tube, coil and fixed bed reactor were compared, and the results showed that the fixed bed reactor needed a shortest stable time of 30min, and with the condition of methanol to oil molar ratio 42:1, 18MPa, 150min and 300°C,...

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Statistical optimization of biodiesel production from sunflower waste cooking oil using basic heterogeneous biocatalyst prepared from eggshells

Nour Sh. El-Gendy, Samiha F. Deriase, A. Hamdy, Renee I. Abdallah, more

Egyptian Journal of Petroleum > 2015 > 24 > 1 > 37-48

A statistical design of experiments DOE was applied to investigate biodiesel fuel BDF production process from sunflower waste cooking oil SWCO using heterogeneous bio-catalyst produced from eggshells ES. It was based on 3 level D-optimal design involving as factors methanol:oil M:O molar ratio, catalyst concentration (wt%), reaction time (min) and mixing rate (rpm). Twenty runs were carried out. A...

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Kinetics of ionic liquid-heteropolyanion salts catalyzed transesterification of oleic acid methyl ester: A study by sequential method

Kaixin Li, Linlu Bai, Yanhui Yang, Xinli Jia, more

Catalysis Today > 2014 > 233 > Complete > 155-161

The kinetics of ionic liquid-heteropolyanion (IL-HPA) salts catalyzed transesterification of oleic acid methyl ester (OAME) was studied via a sequential method. The method can be separated into two parts. The first part was to analyze the kinetics of transesterification of OAME catalyzed by a novel catalyst and to provide a way to simulate the reaction rate profile. The second part was to verify the...

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Techniques d’assemblage de systèmes bislactones, poly et diversement substitués

Gwenaëlle Liberge, Stéphane Lebrun, Axel Couture, Pierre Grandclaudon

Comptes rendus - Chimie > 2011 > 14 > 11 > 1014-1021

Différentes approches synthétiques vers une variété de systèmes bislactones (tétrahydrofuro[3,4-c]furan-1,4-diones) diversement substitués ont été développées. Elles reposent sur l’élaboration préalable d’une γ-lactone équipée de groupements fonctionnels qui, sur la base de transformations chimiques simples, peuvent être engagés dans la création de la seconde unité lactone fusionnée.

article

Polynitrogen strong bases as immobilized catalysts for the transesterification of vegetable oils

Georges Gelbard, Florence Vielfaure-Joly

Comptes Rendus de l'Acad�mie des Sciences - Series IIC - Chemistry > 2000 > 3 > 7 > 563-567

A new and convenient method has been developed for the synthesis of soluble and polystyrene-supported biguanides by the nucleophilic addition of guanidines to soluble and polymeric carbodiimides. These biguanides are excellent recyclable catalysts for the transesterification of triglycerides. © 2000 Académie des sciences / Éditions scientifiques et médicales Elsevier SAS

article

Box–Behnken modeling of biodiesel production from Botryococcus braunii microalgae

Mohamed A. Hassaan, Nesma I. M. Abdelaziz, Muhammad Altaf Nazir, Muhammad Jamshaid, more

Biofuels, Bioproducts and Biorefining > 18 > 5 > 1321 - 1354

This research aimed to model and optimize the growth factors and enhance the lipid yield from Botryococcus braunii microalgae, and to design a system for obtaining biodiesel from these lipids as this does not compromise food security. Botryococcus braunii, grown on a modified Chu‐13 medium, reached the stationary phase after 27 days with a maximum cell count of 265 × 10⁴ cells mL⁻¹ after 27 days and...

article

Application of Stemphylium lycopersici Extracts Immobilized on MCM‐48type Mesoporous Materials as Biocatalysts for Monoacylglycerol Production

Bruno A. Paranhos, Rogério M. Dallago, Gustavo S. Martins, Marcelo L. Mignoni, more

Chemistry & Biodiversity > 21 > 7 > n/a - n/a

Monoacylglycerols are eco‐friendly and inexpensive emulsifiers with a range of applications. The traditional synthetic route is not eco‐friendly, while enzymatic catalysis offers milder reaction conditions and higher selectivity. However, its application still is limited due to the costs. In this context, endophytic fungi can be source to new biocatalysts with enhanced catalytic activity. Based on...

article

A Design of Transesterification Vitrimers with Variable Fractions of Network Defects and the Creep Characteristics

Takaya Inaba, Mikihiro Hayashi

Macromolecular Chemistry and Physics > 225 > 13 > n/a - n/a

Vitrimer materials have attained great interest owing to their sustainable functions and distinctive physical properties. Compared with conventional cross‐linked materials, the thermoplastic‐like nature, such as the stress relaxation and creep at high temperatures, is outstanding, which is owing to the activation of the bond exchange in the cross‐linked network. The activation temperature of the bond...

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Hyperbranched Vitrimer for Ultrahigh Energy Dissipation

Lin Cheng, Jun Zhao, Zhongqiang Xiong, Sijun Liu, more

Angewandte Chemie International Edition > 63 > 28 > n/a - n/a

Polymers are ideally utilized as damping materials due to the high internal friction of molecular chains, enabling effective suppression of vibrations and noises in various fields. Current strategies rely on broadening the glass transition region or introducing additional relaxation components to enhance the energy dissipation capacity of polymeric damping materials. However, it remains a significant...

article

Hyperbranched Vitrimer for Ultrahigh Energy Dissipation

Lin Cheng, Jun Zhao, Zhongqiang Xiong, Sijun Liu, more

Angewandte Chemie > 136 > 28 > n/a - n/a

Polymers are ideally utilized as damping materials due to the high internal friction of molecular chains, enabling effective suppression of vibrations and noises in various fields. Current strategies rely on broadening the glass transition region or introducing additional relaxation components to enhance the energy dissipation capacity of polymeric damping materials. However, it remains a significant...

article

Development of an eco‐friendly technology for biodiesel production by Spirulina sp. isolated from pond water

Shunmugiah Mahendran, Mariswaran Sethuraman, Jeyaraj John Wilson, Samuthirapandi Muniasamy, more

Environmental Quality Management > 33 > 4 > 495 - 500

Biodiesel made from renewable energy sources is gaining popularity due to its environmental and economic benefits. In this work, the effect of the most important reaction variables was investigated during the acid‐catalyzed of Spirulina sp. microalgae oil to biodiesel. Results showed that the biodiesel was obtained at 60°C for 8 h using 30 g of dry Spirulina sp. powder in 300 mL of n‐hexane. Physical...

article

Transesterification Induced Multifunctional Additives Enable High‐Performance Lithium Metal Batteries

Yuanhang Gao, Gang Wu, Wenqiang Fang, Zuosu Qin, more

Angewandte Chemie > 136 > 22 > n/a - n/a

The electrolyte chemistry is crucially important for promoting the practical application of lithium metal batteries (LMBs). Here, we demonstrate for the first time that 1,3‐dimethylimidazolium dimethyl phosphate (DIDP) and trimethylsilyl trifluoroacetate (TMSF) can undergo in situ transesterification in carbonate electrolyte to generate dimethyl trimethylsilyl phosphate (DTMSP) and 1,3‐dimethylimidazolium...

article

Transesterification Induced Multifunctional Additives Enable High‐Performance Lithium Metal Batteries

Yuanhang Gao, Gang Wu, Wenqiang Fang, Zuosu Qin, more

Angewandte Chemie International Edition > 63 > 22 > n/a - n/a

The electrolyte chemistry is crucially important for promoting the practical application of lithium metal batteries (LMBs). Here, we demonstrate for the first time that 1,3‐dimethylimidazolium dimethyl phosphate (DIDP) and trimethylsilyl trifluoroacetate (TMSF) can undergo in situ transesterification in carbonate electrolyte to generate dimethyl trimethylsilyl phosphate (DTMSP) and 1,3‐dimethylimidazolium...

article

Sustainable biofuel production in Sub‐Saharan Africa: Exploring transesterification process, nonedible feedstocks, and policy implications

Baraka Kichonge, Thomas Kivevele

Wiley Interdisciplinary Reviews: Energy and Environment > 13 > 3 > n/a - n/a

The world is currently dealing with an energy crisis, primarily due to heavy reliance on finite fossil fuels and the associated rise in energy demand. In response to this crisis, replacing heavy reliance on finite fossil fuels with biodiesel has gained attention as an alternative solution. Sub‐Saharan African (SSA) biodiesel studies have traditionally focused on improving transesterification but overlook...

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Metal–organic framework‐supported hydroxyapatite (UiO‐66@HAp): an efficient catalyst for the microwave‐assisted transesterification of palm oil

Juri Kalita, Linkon Bharali, Bidisha Chetia, Debarati Chakraborty, more

Biofuels, Bioproducts and Biorefining > 18 > 2 > 410 - 424

Biodiesel has recently emerged as a renewable and environmentally benign fuel substitute for fossil‐derived energy sources. The use of heterogeneous solid catalysts for the generation of biodiesel from biomass‐derived fats and oils is sustainable. Among various reported catalyst supports, metal–organic frameworks (MOFs) have been popular choices for enhancing catalytic activity for biodiesel synthesis...

article

A review of the use of SrO in catalysts for biodiesel production

J. Andrés Tavizón‐Pozos, Zita G. Cruz‐Aburto

Biofuels, Bioproducts and Biorefining > 18 > 2 > 652 - 668

SrO has attracted attention for its use as a heterogeneous catalyst in producing biodiesel from transesterification owing to its high alkaline character and low solubility in methanol. In studies conducted in this decade, reaction conditions such as the methanol–oil molar ratio, reaction time, catalyst loading and temperature have been optimized in these systems. Furthermore, several works have been...

article

Optimization of Methanolysis of Used Cooking Oil by the Taguchi Experimental Design Approach

Adeyinka Sikiru Yusuff, Peace Otaoghene Aka, Anselm Iuebego Igbafe

Chemical Engineering & Technology > 47 > 3 > 494 - 503

The goal of this study was to look into the catalytic activity of KOH‐modified CaO from eggshell as catalyst for the optimization of biodiesel production from used cooking oil (UCO), applying the Taguchi approach. The strong base catalyst (K/CE) was formulated by doping KOH on calcined chicken eggshell at various quantities (0–2.5 g), where 2 g of KOH doped on 5 g of calcined eggshell (2K/CE) and...

article

General Construction of Asymmetric Amine Ethers via Efficient Transesterification

Ziwei Li, Zeng Hong, Chao Qian, Xinzhi Chen, more

Chemistry – A European Journal > 30 > 10 > n/a - n/a

A novel method to prepare asymmetric amine ethers is reported. Tertiary amine alcohol hydrogen sulfate intermediates are prepared through a reactive distillation process, followed by the transesterification process to afford eventually asymmetric amine ethers. Experiments and DFT calculations revealed the essential roles the sulfate group plays in the highly selective monoesterification process. This...

article

Statistical optimization of ultrasound‐assisted biodiesel production from Moringa oleifera oil – waste cooking oil mixture using modified conch shell catalyst

Subramaniapillai Niju, Kesav Aishwarya, Muthusamy Balajii, Perumal Asaithambi

Environmental Progress & Sustainable Energy > 43 > 1 > n/a - n/a

Biodiesel is a potential alternative fuel that offers several environmental benefits and can be used in conventional engines. However, high feedstock cost poses a challenge for its commercial viability. This study focuses on producing biodiesel using waste cooking oil (WCO) and Moringa oleifera oil (MOO) as feedstock, with a specific emphasis on the use of modified conch shell as solid catalyst under...

article

Biodiesel production from sunflower and waste cooking oils using K₂O/RGO catalyst

Sara Ghavami, Faranak Akhlaghian, Sirwan Mohammadiazar, Farhad Rahmani

Environmental Progress & Sustainable Energy > 43 > 1 > n/a - n/a

Biodiesel, touted as a viable alternative to fossil fuels, has attracted interest due to its environmentally friendly nature, renewability, and high combustion yield. This study utilized K₂O/RGO heterogeneous catalyst for biodiesel production through the transesterification of sunflower and waste cooking oils. Reduced graphene oxide (RGO) was prepared from graphite via the modified Hummers' method...

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Search results

Continuous production of biodiesel from soybean flakes by extraction coupling with transesterification under supercritical conditions: Original research article

Statistical optimization of biodiesel production from sunflower waste cooking oil using basic heterogeneous biocatalyst prepared from eggshells

Kinetics of ionic liquid-heteropolyanion salts catalyzed transesterification of oleic acid methyl ester: A study by sequential method

Techniques d’assemblage de systèmes bislactones, poly et diversement substitués

Polynitrogen strong bases as immobilized catalysts for the transesterification of vegetable oils

Box–Behnken modeling of biodiesel production from Botryococcus braunii microalgae

Application of Stemphylium lycopersici Extracts Immobilized on MCM‐48type Mesoporous Materials as Biocatalysts for Monoacylglycerol Production

A Design of Transesterification Vitrimers with Variable Fractions of Network Defects and the Creep Characteristics

Hyperbranched Vitrimer for Ultrahigh Energy Dissipation

Hyperbranched Vitrimer for Ultrahigh Energy Dissipation

Development of an eco‐friendly technology for biodiesel production by Spirulina sp. isolated from pond water

Transesterification Induced Multifunctional Additives Enable High‐Performance Lithium Metal Batteries

Transesterification Induced Multifunctional Additives Enable High‐Performance Lithium Metal Batteries

Sustainable biofuel production in Sub‐Saharan Africa: Exploring transesterification process, nonedible feedstocks, and policy implications

Metal–organic framework‐supported hydroxyapatite (UiO‐66@HAp): an efficient catalyst for the microwave‐assisted transesterification of palm oil

A review of the use of SrO in catalysts for biodiesel production

Optimization of Methanolysis of Used Cooking Oil by the Taguchi Experimental Design Approach

General Construction of Asymmetric Amine Ethers via Efficient Transesterification

Statistical optimization of ultrasound‐assisted biodiesel production from Moringa oleifera oil – waste cooking oil mixture using modified conch shell catalyst

Biodiesel production from sunflower and waste cooking oils using K₂O/RGO catalyst

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