Microwave fast-tracking biodiesel production

Jermolovicius, Luiz Alberto; Cantagesso, Luana C.M.; Nascimento, Renata B. do; Castro, Edmilson Renato de; Pouzada, E. V. dos S.; Senise, J.T.

doi:10.1016/j.cep.2017.03.010

Cited by 21 publications

(6 citation statements)

References 36 publications

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“…The Box-Behnken experimental design for the microwave irradiation-assisted transesterification process is shown in Table 3. The operating conditions followed Milano et al [34], Jermolovicius et al [35], and El Sherbiny et al [36], who conducted optimization studies of biodiesel production from edible and nonedible oils using microwave irradiation-assisted method. Milano et al [34] recommended: (1) methanol/oil ratio: 59.60%, (2) catalyst concentration: 0.77%, (3) stirring speed: 600 rpm, and (4) reaction time: 429 s, while Jermolovicius et al [35] suggested reaction time can be completed at 450 s with 1.76 W/g of microwave power and lastly Sherbiny et al [36] recommended (1) methanol/oil molar ratio: 7.5:1 (approximately methanol/oil ratio:35%), ( 2 where M ME is the weight of the methyl ester produced in grams (g), and M O is the weight of the esterified Ceiba pentandra oil in grams (g).…”

Section: Transesterification Processmentioning

confidence: 99%

Biodiesel synthesis from Ceiba pentandra oil by microwave irradiation-assisted transesterification: ELM modeling and optimization

et al. 2020

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Section: Transesterification Processmentioning

confidence: 99%

Biodiesel synthesis from Ceiba pentandra oil by microwave irradiation-assisted transesterification: ELM modeling and optimization

et al. 2020

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“…Geniş bir kullanım alanına sahip mikrodalga, kimyasal sentezlemede kullanılan reaktörlerin genelinde ve tüm ev tipi mikrodalga fırınlarda 12.25 cm dalga boylu 2450 MHz frekans değerinde kullanılmaktadır [10]. Mikrodalga teknolojisi kullanılarak gerçekleştirilen reaksiyonlarda; reaksiyon süresinin çok kısalması, yan reaksiyonları azalması ve verim artışı, kimyasal maddelerin direkt olarak ısıtılması, ısıtmanın doğrudan ve merkezden gerçekleştirilmesiyle ısıtmada enerji kaybının azalması gibi avantajlar elde edilmektedir [11,12]. Hernando ve ark [13] mikrodalga ışıma altında geçekleştirdikleri bazik transesterifikasyon optimizasyon çalışmasında, soya ve kanola yağından 1 ila 5 dakikalık reaksiyon süreleri sonunda %97'ye varan biyodizel verimi elde etmişlerdir.…”

Section: şEkil 1 Transesterifikasyon Reaksiyonu Gösterimiunclassified

Pilot scale biodiesel production from refined and waste sunflower oils in microwave assisted reactor

Demir¹,

İlten²,

Soyhan³

2018

Balıkesir Üniversitesi Fen Bilimleri Enstitüsü Dergisi

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ÖzetKimyasal bir reaksiyon olan transesterifikasyon, biyodizel üretiminde en yaygın kullanılan yöntemdir. Mikrodalga ısıtma sistemi kullanılarak gerçekleştirilen transesterifikasyon reaksiyonlarında, konvansiyonel sistemlere kıyasla büyük oranda hız ve verim artışı sağlandığı bilinmektedir. Yapılan literatür taramasında, mikrodalga teknolojisi ile gerçekleştirilen biyodizel üretimlerinin yalnızca laboratuvar ölçeklerinde sınırlı kaldığı, henüz pilot ya da büyük ölçekte bir üretimin gerçekleştirilemediği görülmüştür. Bu çalışmada; tasarlanıp imal edilen mikrodalga destekli biyodizel reaktörü kullanılarak, bazik transesterifikasyon yöntemi ile mikrodalga ışıma altında rafine ve atık ayçiçek yağlarından pilot ölçekte biyodizeller üretilmiştir. Deneylerde sabit reaksiyon koşulları (6:1 molar metanol:yağ, %1.0 KOH (mKOH/myağ), 60⁰C) altında reaksiyon süresinin transesterifikasyon tamamlanma oranı ve temel biyodizel özellikleri üzerindeki etkisi incelenmiştir. Ayrıca, rafine ayçiçek yağından hem mikrodalga ışıma altında, hem de reaktördeki konvansiyonel ısıtma sistemi (elektrikli rezistans) kullanılarak biyodizel numuneleri üretilmiş, böylece iki metodun net olarak kıyaslanması sağlanmıştır. Elde edilen sonuçlara göre; mikrodalga ısıtma sistemi kullanımında rafine ayçiçek yağı transesterifikasyonun 5 dakika sonunda tamamlandığı, konvansiyonel ısıtma sistemi kullanımında ise 60 dakika sonunda dahi yeterli ester içeriğine sahip biyodizelin üretilemediği ve reaksiyonun tamamlanabilmesi için daha uzun reaksiyon sürelerine ihtiyaç duyulduğu tespit edilmiştir. Atık ayçiçek yağı kullanımında ise belirlenen reaksiyon koşullarında istenen düzeyde dönüşümünün sağlanamadığı, ancak literatürdeki benzer konvansiyonel transesterifikasyon reaksiyonlarına göre çok daha kısa sürede ve daha yüksek verimle metil ester elde edilebildiği gözlemlenmiştir.Anahtar kelimeler: Rafine ayçiçek yağı, atık ayçiçek yağı, mikrodalga, biyodizel. AbstractTransesterification, which is a chemical reaction, is the most commonly used method in biodiesel production. It is known that in transesterification reactions, using microwave heating system increases the reaction rate and efficiency in comparison with the conventional systems. According to the literature review, it is seen that biodiesel productions using microwave technology are limited only with the laboratory scales, and no pilot or large scale productions have not been realized yet. In this study, pilot scaled biodiesels are produced from refined and waste sunflower oils with basecatalyzed transesterification method under microwave irradiation by using the designed and manufactured microwave assisted reactor. In the experiments, under constant reaction conditions (6: 1 molar methanol:oil, 1.0% KOH (mKOH/myağ), 60 ºC), the effect of the reaction time on the transesterification completion rate and the main biodiesel properties are examined. In addition, the biodiesel samples are produced from refined sunflower oil both with the microwave system and conventional heating system (by electric resistance...

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“…In these applications, the reactor where transesterification occurs is irradiated with radiofrequency or microwave power to improve the conversion rate. Since the electrical properties govern the interaction between the mixture inside the reactor and the electric field, their study is mandatory to design and operate a reactor based on these technologies 31–35 …”

Section: Introductionmentioning

confidence: 99%

“…Since the electrical properties govern the interaction between the mixture inside the reactor and the electric field, their study is mandatory to design and operate a reactor based on these technologies. [31][32][33][34][35] This study aims to present in an accessible and organized way interesting results on the use of electrical properties of BD, its feedstocks, and its blends with other substances. In fact, given its industrial importance, special attention is paid to BD blends with DF.…”

mentioning

confidence: 99%

A review of electrical properties of biodiesel and its blends: experimental data, prediction models and applications

Alviso

Corach

2023

Biofuels Bioprod Bioref

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Biodiesel is widely used pure or mixed with diesel fossil fuel in diesel engines. Standards for determining biodiesel quality establish limits for the values of several physicochemical properties. However, the procedures to determine many properties are time-consuming and demand specialized personnel and expensive equipment. Other methods to characterize biodiesel, such as electrical methods, are particularly interesting. Measurements of electrical properties (permittivity and conductivity) give valuable information about biodiesel, its feedstocks, and its blends with fossil fuel diesel, and solve the usual cost and time drawbacks. This work aims to present a thorough and systematic review of the literature on applications of electrical properties measurements of biodiesel, its feedstocks, and mixtures with other fuels. An overview of the experimental data, typical ranges of values, prediction models, and applications is presented and analyzed in detail, emphasizing blends of biodiesel with fossil fuel diesel. Correlations with important properties (kinematic viscosity, methanol content) are reviewed. Applications include transesterification monitoring, biodiesel aging, the detection of contaminants and electromagnetic heating. This research aimed to determine whether electrical properties are a valuable tool for the biodiesel industry, and what applications may be realized in light of current scientific development. It was determined that, in the current state of research, permittivity measurements could be used to accurately determine the amount of diesel and biodiesel in mixtures.

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Microwave fast-tracking biodiesel production

Cited by 21 publications

References 36 publications

Biodiesel synthesis from Ceiba pentandra oil by microwave irradiation-assisted transesterification: ELM modeling and optimization

Biodiesel synthesis from Ceiba pentandra oil by microwave irradiation-assisted transesterification: ELM modeling and optimization

Pilot scale biodiesel production from refined and waste sunflower oils in microwave assisted reactor

A review of electrical properties of biodiesel and its blends: experimental data, prediction models and applications

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