Ultrasound-assisted transesterification of soybean oil using low power and high frequency and no external heating source

Oliveira, Pâmella A.; Baêsso, Raphaela M.; Morais, Gabriel Cataldo; Alvarenga, André Victor; Costa-Félix, Rodrigo Pereira Barretto da

doi:10.1016/j.ultsonch.2021.105709

Cited by 20 publications

(12 citation statements)

References 55 publications

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“…These conventional techniques have a few limitations for high-FFA oil, such as a slow reaction rate, a long reaction time and high energy consumption, resulting in a low FFA conversion yield. [22][23][24][25][26][27][28][29][30][31][32][33][34][35][36] Since methanol and oil are immiscible, making effective contact during the reaction is difficult and leads to slower conversion rates and longer reaction periods. Accelerating processes with cavitation can assist in getting around reactant immiscibility.…”

Section: Statement Of Noveltymentioning

confidence: 99%

“…There have been reports on process development using ultrasound waves with a single frequency. It has been determined that ultrasound waves can enhance the efficacy of esterification [22][23][24][25][26][27][28] and transesterification [29][30][31][32][33][34][35][36] by significantly reducing the reaction time and the required excess M:O molar ratio, and increasing the conversion rate of FFAs with respect to conventional mechanical stirring. For intensifying these reactions, sonochemical reactors with ultrasonic baths and ultrasonic horn irradiation types have been used.…”

Section: Statement Of Noveltymentioning

confidence: 99%

“…Using conventional techniques such as stirring or refluxing, the reviews presented above have been successful. These conventional techniques have a few limitations for high‐FFA oil, such as a slow reaction rate, a long reaction time and high energy consumption, resulting in a low FFA conversion yield 22–36 . Since methanol and oil are immiscible, making effective contact during the reaction is difficult and leads to slower conversion rates and longer reaction periods.…”

Section: Introductionmentioning

confidence: 99%

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Ultrasound intensification of two‐stage biodiesel production: optimization for palm empty fruit bunch oil as a palm oil industry by‐product

Seithtanabutara,

Pholsawang,

Wongwuttanasatian

2023

Biofuels Bioprod Bioref

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Palm empty fruit bunch oil (palm EFB oil) is a waste product that can be used to produce biodiesel at a low cost. However, high free fatty acid (FFA) content is the primary obstacle to biodiesel production. Before the transesterification process can begin, the oil must be esterified to reduce its acid content. This study seeks to employ dual‐frequency ultrasound at frequencies of 28 kHz (200 W) and 40 kHz (200 W) to aid in the esterification and transesterification of ZSM‐5‐38 and CaO catalysts, respectively. Central composite design and response surface methodology were used to determine the optimal conditions for the three primary parameters of methanol to oil (M:O molar ratio), catalyst loading and reaction time. A 12:1 M:O molar ratio, 11.36 wt% catalyst loading (ZSM‐5‐38) and 60 min of reaction duration were the optimal conditions for esterification to achieve a FFA conversion of 91.51%. The reusability of ZSM‐5‐38 revealed a decrease in FFA conversions of 87.36, 75.11, 67.13 and 58.68% with each reused cycle. The optimal transesterification conditions were a 3.28:1 M:O molar ratio, 4.62 wt% catalyst loading (CaO) and 64 min of reaction time, yielding 83.58% biodiesel. The viscosity value (D 445), the flash point (D 93) and the heating value (ASTM D240) of biodiesel produced under optimal conditions were evaluated. The biodiesel properties were determined to be 4.7931 mm2/s, 176°C and 40 398 kJ/kg, respectively.

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Section: Statement Of Noveltymentioning

confidence: 99%

Section: Statement Of Noveltymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Ultrasound intensification of two‐stage biodiesel production: optimization for palm empty fruit bunch oil as a palm oil industry by‐product

Seithtanabutara,

Pholsawang,

Wongwuttanasatian

2023

Biofuels Bioprod Bioref

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“…Therefore, this emerging approach can be adapted to provide the more efficient biodiesel production process. Another study by Oliveira and co-workers reported that the removal of external heating source and mechanical agitation is beneficial for ultrasonic assisted transesterification process (Oliveira et al, 2021).…”

Section: Ultrasonic Assisted Biodiesel Synthesismentioning

confidence: 99%

A Review on the Recent Breakthrough Methods and Influential Parameters in the Biodiesel Synthesis and Purification

Silviana

Anggoro

Hadiyanto

et al. 2022

Int. J. Renew. Energy Dev.

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Biodiesel has recently received much attention as an energy source with numerous benefits such as high degradability, negligible toxicity, and minimal emissions of carbon monoxide gases as well as particulates. Therefore, this research aims to compare, review, and summarize the conventional and advanced methods of biodiesel production. Currently, some emerging processes that were developed for advanced biodiesel production include microwave-assisted synthesis, ultrasonic-assisted synthesis, supercritical transesterification, and liquid phase plasma discharge technology. The types of feedstocks, catalysts, and operating conditions as the influential parameters in biodiesel synthesis are also discussed. Moreover, in the purification process, the effectiveness of purification depends on the type of catalyst applied in the synthesis process. This research also reviewed and compared several commonly used purification methods such as wet and dry washing, ion exchange and precipitation, complexation, and membrane-based separation that have shown significant results along with the impacts of biodiesel production on environmental and economic sectors

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“…Oliveira el al. [16] evaluated the effect of low power and high-frequency ultrasound (1 to 3 MHz) on the transesterification of soybean oil, without the aid of external source and mechanical stirring. According to the authors, this approach can make the system even more environmentally friendly and economical for industrial applications.…”

mentioning

confidence: 99%

Ultrasonics Sonochemistry in Latin America

Flores

2022

Ultrasonics Sonochemistry

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Ultrasound-assisted transesterification of soybean oil using low power and high frequency and no external heating source

Abstract: Graphical abstract

Cited by 20 publications

References 55 publications

Ultrasound intensification of two‐stage biodiesel production: optimization for palm empty fruit bunch oil as a palm oil industry by‐product

Ultrasound intensification of two‐stage biodiesel production: optimization for palm empty fruit bunch oil as a palm oil industry by‐product

A Review on the Recent Breakthrough Methods and Influential Parameters in the Biodiesel Synthesis and Purification

Ultrasonics Sonochemistry in Latin America

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