A review of the feedstocks, catalysts, and intensification techniques for sustainable biodiesel production

Athar, Manazir; Zaidi, Sadaf

doi:10.1016/j.jece.2020.104523

Cited by 193 publications

(88 citation statements)

References 447 publications

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“…Thus, various innovative process intensification technologies (biological reactors, microreactors, membrane reactors, oscillatory flow reactors, microwave reactors, reactive distillation, centrifugal contractors, etc.) can be found in the literature [6][7][8][9][10]. On the other hand, the use of bio-based technologies in biodiesel production is regarded as advantageous as these methods generate less waste and are considered ecofriendly.…”

Section: Biofuels: the Search For Alternative Fuels For Transportationmentioning

confidence: 99%

Biodiesel and Other Value-Added Products from Bio-Oil Obtained from Agrifood Waste

Sánchez-Borrego¹,

Mateos²,

García‐Martín³

2021

Processes

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Bio-oil is a promising source of chemicals and renewable fuels. As the liquid phase obtained from the pyrolysis of biomass, the composition and amount of bio-oil generated depend not only on the type of the biomass but also on the conditions under which pyrolysis is performed. Most fossil fuels can be replaced by bio-oil-derived products. Thus, bio-oil can be used directly or co-fed along with fossil fuels in boilers, transformed into fuel for car engines by hydrodeoxygenation or even used as a more suitable source for H2 production than biomass. On the other hand, due to its rich composition in compounds resulting from the pyrolysis of cellulose, hemicellulose and lignin, bio-oil co-acts as a source of various value-added chemicals such as aromatic compounds. This review presents an overview of the potential applications of bio-oils and the pyrolysis conditions under which they are obtained. Then, different extraction methods for value-added chemicals, along with the most recent developments, are discussed and future research directions for bio-oil upgrades are highlighted.

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Section: Biofuels: the Search For Alternative Fuels For Transportationmentioning

confidence: 99%

Biodiesel and Other Value-Added Products from Bio-Oil Obtained from Agrifood Waste

Sánchez-Borrego¹,

Mateos²,

García‐Martín³

2021

Processes

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“…Biodiesel production commonly takes place using base catalysts because of several advantages over acid catalysts. The base-catalyzed transesterification provides a faster reaction rate, it is 4000 times faster than acid-catalyzed transesterification if the same amount of acid catalyst is used [62,63]. The homogeneous alkalicatalyzed transesterification is applied for industrial biodiesel production due to several reasons: faster reaction rate, higher activity of catalyst, and widely available and economically feasible process [64].…”

Section: Homogeneous Alkali-catalyzed Transesterificationmentioning

confidence: 99%

Comprehensive Review on Biodiesel Production from Palm Oil Mill Effluent

et al. 2021

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Biodiesel synthesis processes including pyrolysis, direct blending, transesterification, and advanced technologies such as microwave-and ultrasoundassisted and supercritical processes from palm oil mill effluent (POME) are reviewed to highlight the significance and advances in terms of process sustainability and cost. POME as the most contaminated waste can be effectively utilized for biodiesel production. Supercritical transesterification offers more advantages over the other processes including higher reaction rate, without catalyst constraint, producing pure glycerol, and simple product separation process. The addition of co-solvents like CO 2 should be investigated for supercritical biodiesel production from POME. Although POME is an inexpensive source to synthesize biodiesel, innovative processes are needed to maximize the oil recovery from POME. Optimization of transesterification parameters is required for high production yields and sustainable processing.

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“…These oils have prodigious significance for supplementing other conventional stuff. The nonedible plant oil can be chosen as low-price sources and from other sides like economic and waste management [12].…”

Section: Introductionmentioning

confidence: 99%

Biodiesel Production From Waste Cooking Oil using Homogeneous Catalyst

Hamed

Mohammed

Habeeb³

et al. 2021

Egypt. J. Chem.

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Due to the upsurge of awareness of the depletion of fossil fuel feedstock and environmental issues, biodiesel has become a more attractive choice. Biodiesel's productivity is deemed a fruitful and significant research field since its relevance obtains from the increased oil prices and environmental benefits. This paper presents a study of Alfa waste cooking oil used to produce biodiesel oil via the transesterification process. The investigation includes various variables such as transesterification time, catalyst ratio, temperature, and biodiesel yield. Two catalysts (NaOH and KOH) have been utilized in this study. The engine test was carried out at constant load with increasing speed to compare different fuels' performance relative to mineral diesel. The produced biodiesel was categorized according to ASTM D6751. The highest conversion and yield of biodiesel in the transesterification method were scrutinized using the KOH catalyst compared to the NaOH catalyst. The maximum conversion and yield of biodiesel are 97.76 and 94.4%, respectively, with optimum operating conditions of 60 o C reaction temperature, 3 hours reaction time, and KOH catalyst at 4% weight. Consequently, the engine test outcomes revealed similar biodiesels trends compared to diesel in terms of engine brake power and brake specific fuel consumption with increasing engine speed.

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A review of the feedstocks, catalysts, and intensification techniques for sustainable biodiesel production

Cited by 193 publications

References 447 publications

Biodiesel and Other Value-Added Products from Bio-Oil Obtained from Agrifood Waste

Biodiesel and Other Value-Added Products from Bio-Oil Obtained from Agrifood Waste

Comprehensive Review on Biodiesel Production from Palm Oil Mill Effluent

Biodiesel Production From Waste Cooking Oil using Homogeneous Catalyst

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