Catalytic upgrading of waste tire pyrolysis oil via supercritical esterification with deep eutectic solvents (green solvents and catalysts)

Alhassan, Yahaya; Kumar, Naveen; Bugaje, I. M.

doi:10.1016/j.joei.2015.05.003

Cited by 27 publications

(8 citation statements)

References 30 publications

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“…In addition, it has been already shown that the viscosity decreases significantly when the temperature increases. 20,24,25 For example, the viscosity of glucose/ChCl/ water is decreased by two-thirds when the temperature increases from 20 to 40 °C.…”

Section: Liquid Phase For Extraction Processmentioning

confidence: 99%

Application of Deep Eutectic Solvents (DES) for Phenolic Compounds Extraction: Overview, Challenges, and Opportunities

Ruesgas‐Ramón

Figueroa-Espinoza

Durand

2017

J. Agric. Food Chem.

560

288

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The green chemistry era has pushed the scientific community to investigate and implement new solvents in phenolic compounds (PC) extraction as alternatives to organic solvents, which are toxic and may be dangerous. Recently, deep eutectic solvents (DES) have been applied as extraction solvents for PC. They have the advantages of biodegradability and ease of handling with very low toxicity. Nevertheless, the extraction process is affected by several factors: affinity between DES and the target compounds, the water content, the mole ratio between DES' starting molecules, the liquid/solid ratio between the DES and sample, and the conditions and extraction method. On the other hand, PC recovery from DES is a challenge because they can establish a strong hydrogen bond network. Alternatively, another possibility is to use DES as solvent extraction as well as formulation medium. In this way, DES can be suitable for cosmetics, pharmaceutical, or food applications.

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Section: Liquid Phase For Extraction Processmentioning

confidence: 99%

Application of Deep Eutectic Solvents (DES) for Phenolic Compounds Extraction: Overview, Challenges, and Opportunities

Ruesgas‐Ramón

Figueroa-Espinoza

Durand

2017

J. Agric. Food Chem.

560

288

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“…methanol, ethanol) has been extensively studied. The transesterification process can usually be catalyzed by a chemical method or an enzymatic method; while the chemical method can be divided into acid or base catalysts, such as sulfuric acid (Souza et al, 2016), chlorhydric acid (Pastore et al, 2015) and sulfonic acid (Alhassan et al, 2015) as acid catalyst, or NaOH (Almeida et al, 2015), KOH (Ullah et al, 2015) and NaOCH 3 (Holser, 2008) as base catalyst. With the aim of green processing in the oleo-industry, the disadvantages of these chemical methods, such as harsh reaction conditions and corrosive catalysts, retarded the development of the oleo industry.…”

Section: Introductionmentioning

confidence: 99%

Lipase-catalyzed transesterification of epoxidized soybean oil to prepare epoxy methyl esters

Liu

Duan

2018

Grasas y Aceites

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SUMMARY:Epoxidized soybean oil methyl esters could be efficiently prepared with the transesterification of epoxidized soybean oil (ESBO) with a lower dosage of methanol using lipase Novozym 435 as catalyst. The optimum parameters were as follows: the molar ratio of 5:1 (methanol to ESBO), 5% Novozym 435 as catalyst, at 45 °C for 14 h, with a stirring speed of 600rpm, under which the epoxidized soybean oil methyl esters (ESBOME) could be obtained at a 95.7% yield. During the enzymatic transesterification process, the oxirane oxygen values were kept unchangeable, which indicated that excellent functional group tolerance could be achieved under such mild reaction conditions. In addition, the recyclability of the immobilized enzyme Novozym 435 in this transesterification process was examined and the results showed that the biocatalyst could be reused ten times without losing any reaction activity or selectivity. And the final products of ESBOME were also identified by IR and NMR analysis. The kinetic data obtained followed the Ping-Pong Bi mechanism model (V max = 6.132 mol·L RESUMEN:Transesterificación catalizada por lipasa en aceite de soja epoxidado para preparar epoxi metil ésteres. Los ésteres metílicos de aceites de soja epoxidados pueden prepararse eficientemente mediante la transesterificación del aceite de soja epoxidado (ESBO) con una menor dosificación de metanol utilizando la lipasa Novozym 435 como catalizador. Los parámetros óptimos fueron los siguientes: relación molar 5:1 de metanol:ESBO, 5% de Novozym 435 como catalizador, 45 °C durante 14 h, velocidad de agitación de 600 rpm, bajo la cual los ésteres metílicos de aceites de soja epoxidados (ESBOME) pueden obtenerse con un rendimiento del 95,7%. Durante el proceso de transesterificación enzimática, los valores de oxígeno de oxirano se mantuvieron inalterables, lo que indicó que se logra una excelente estabilidad del grupo funcional en tales condiciones de reacción suaves. Además, se examinó la reciclabilidad de la enzima inmovilizada Novozym 435 en este proceso de transesterificación y los resultados mostraron que el biocatalizador podría reutilizarse durante diez veces sin perder ninguna actividad de reacción o selectividad. Los productos finales de ESBOME se identificaron por IR y análisis de RMN. Los datos cinéticos obtenidos siguieron el modelo de mecanismo Ping-Pong Bi (V max = 6,132 mol·L

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“…It can be observed from Table 5 that for the most popular solvent, the operation conditions would have temperature and pressure more than 512.6 K and 8.09 Mpa, respectively. However, it is imperative to note that high pressure and temperature favor the reaction condition, which in turn presents a difficult situation to predict the exact positioning of parameters 33,34 . This harsh environment presents a significant challenge to the materials for the reactor and on its accessories.…”

Section: Supercritical Transesterification and Its Limitationsmentioning

confidence: 99%

Supercritical transesterification route for biodiesel production: Effect of parameters on yield and future perspectives

Singh

Kumar

Gautam

2021

Env Prog and Sustain Energy

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Catalyst‐free biodiesel production through supercritical transesterification is faster with the high conversion and a more environment‐friendly route than conventional catalyst transesterification. Improving and exploring the new possibilities in this alternative biodiesel production method by including newly available technology will lead us to a more sustainable future. In this paper, supercritical transesterification of biodiesel production has been reviewed in detail. The different parameters of this method, such as temperature, pressure, molar ratio, alcohol types, and residence time which affect the yielding and quality of fuel, have been reviewed. Besides, recycling the energy and suitable feedstock for this method has also been explored to reduce the intensive energy demand and operating cost. Furthermore, light has also thrown on co‐solvents effect on this method to reduce the extreme reaction conditions required. At last, the review concludes future recommendations in supercritical transesterification along with the challenges in energy integration and recycling.

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Catalytic upgrading of waste tire pyrolysis oil via supercritical esterification with deep eutectic solvents (green solvents and catalysts)

Cited by 27 publications

References 30 publications

Application of Deep Eutectic Solvents (DES) for Phenolic Compounds Extraction: Overview, Challenges, and Opportunities

Application of Deep Eutectic Solvents (DES) for Phenolic Compounds Extraction: Overview, Challenges, and Opportunities

Lipase-catalyzed transesterification of epoxidized soybean oil to prepare epoxy methyl esters

Supercritical transesterification route for biodiesel production: Effect of parameters on yield and future perspectives

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