System dynamics applied to second generation biofuel in Brazil: A circular economy approach

Freitas, Emmanuelle Soares de Carvalho; Xavier, Lúcia Helena; Oliveira, Luciano Basto; Guarieiro, Lílian Lefol Nani

doi:10.1016/j.seta.2022.102288

Cited by 8 publications

(6 citation statements)

References 49 publications

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“…The necessity of finding alternative pathways for power supplementation in a more sustainable way has been promoted because of the current carbon emissions that contribute to climate change [1]. Thus, the energy-from-waste (EfW) concept has been introduced as an alternative pathway where the use of refuse-derived flues, household waste and non-hazardous industrial by-products are considered as potential sources for energy production [1]. This productive model fits with the sustainable model of circular economy in which the concept 'end-of-life' is replaced by reutilization, recycling and recovering.…”

Section: Introductionmentioning

confidence: 99%

“…Agricultural residues are defined as unusable and unstable materials derived from agricultural production which are directly linked to the cultivation of crops, and these materials are characterized by their biodegradability and solid and lignocellulosic composition [3,4]. In this way, the lignocellulosic non-edible biomass discarded by agriculture feedstock can be used as raw material to obtain biofuel, being considered second-generation (2G) biofuel [1,5]. Lignocellulosic biomass is mainly composed by cellulose, hemicellulose, and lignin, which are low energy-density compounds, so a pretreatment step is necessary so plant-specific enzymes can release sugars for biofuel production [5,6].…”

Section: Introductionmentioning

confidence: 99%

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Utility Aspects of Sugarcane Bagasse as a Feedstock for Bioethanol Production: Leading Role of Steam Explosion as a Pretreatment Technique

Barciela,

Perez-Vazquez,

Fraga-Corral

et al. 2023

Processes

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Lignocellulosic biomass is a powerful approach to produce sustainable biofuels and the further achievement of the goal of biomass conversion into a second-generation clean energy that can cope with the depletion of fossil reserves and rising energy requirements. In the conversion process, a pretreatment is essential to overcome the recalcitrance of the lignocellulosic biomass; accelerate its disintegration into cellulose, hemicellulose, and lignin; and, in turn, obtain an optimal yield of fermentable sugars in the enzymatic hydrolysis. In addition to this, it should be industrially scalable and capable of enhancing fuel properties and feedstock processability. Here, steam explosion technology has stood out due to its results and advantages, such as wide applicability, high efficiency in the short term, or lack of contamination despite its conventionality. This gentle and fast pretreatment incorporates high temperature autohydrolysis and structural alteration by explosive decompression. The steam explosion method has been one of the most effectual, especially for the hydrolysis of cellulose from agricultural wastes due to the lower quantity of acetyl groups in the composition of hemicellulose. In this aspect, sugarcane bagasse is a promising feedstock for bioethanol production due to its high cellulosic content and elevated availability. The objective of this review has been to compile the latest information on steam explosion pretreatment, stages, equipment, variables involved, by-products generated, as well as the advantages and disadvantages of the technique. At the same time, its feasibility and viability using sugarcane bagasse as feedstock has been discussed. Finally, the effectiveness of the technique with different feedstocks has been evaluated.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Utility Aspects of Sugarcane Bagasse as a Feedstock for Bioethanol Production: Leading Role of Steam Explosion as a Pretreatment Technique

Barciela,

Perez-Vazquez,

Fraga-Corral

et al. 2023

Processes

View full text Add to dashboard Cite

show abstract

“…The necessity of finding alternative pathways for power supplementation in a more sustainable way has been promoted because of the current carbon emissions that contribute to both global warming and climate change [1]. Thus, the energy from waste (EfW) concept has been introduced as an alternative pathway where the use of refuse derived flues, household waste and non-hazardous industrial by-products are considered as potential sources for energy production [1]. This productive model fits whit the sustainable model of circular economy in which the concept 'end-of-life' is replaced by reutilization, recycling and recovering.…”

Section: Introductionmentioning

confidence: 99%

“…Agricultural waste is defined as anything that is useless, and it is characterized by its biodegradability, solid and lignocellulosic composition [3]. In this way, the lignocellulosic non-edible biomass discarded by agriculture feedstock can be used 2 as matrix to obtain biofuel, being considered second generation (2G) biofuel [1,4]. Lignocellulosic biomass is mainly composed by cellulose, hemicellulose, and lignin, which are low energy density compounds, so a pretreatment step is necessary so plant-specific enzymes can release sugars for biofuel production [4,5].…”

Section: Introductionmentioning

confidence: 99%

Insight into a Steam Explosion Pretreatment of Sugarcane Bagasse for Bioethanol Production

Barciela,

Perez-Vazquez,

Fraga-Corral

et al. 2023

Preprint

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Lignocellulosic biomass is a powerful approach for the production of sustainable biofuels and the further achievement of the goal of biomass conversion into a second-generation clean energy that can cope with the depletion of fossil reserves and rising energy requirements. In the conversion process, a pretreatment is essential to overcome the recalcitrance of the lignocellulosic biomass, accelerate its disintegration into cellulose, hemicellulose, and lignin and, in turn, get an optimal yield of fermentable sugars in the enzymatic hydrolysis. In addition to this, it should be industrially scalable and capable of enhancing fuel properties and feedstock processability. Here, steam explosion technology has stood out due to its results and advantages such as wide applicability, high efficiency in the short term, or lack of contamination in spite of its conventionality. This gentle and fast pretreatment incorporates high temperature autohydrolysis and structural alteration by explosive decompression. Steam explosion method has been one of the most effective especially for the hydrolysis of cellulose from agricultural wastes due to the lower quantity of acetyl groups in the composition of hemicellulose. In this aspect, sugarcane bagasse is a promising feedstock for bioethanol production due to its high cellulosic content and elevated availability. The objective of this review has been to compile the latest information on steam explosion pretreatment, stages, equipment, variables involved, by-products generated, as well as the advantages and disadvantages of the technique. At the same time, its feasibility and viability using sugarcane bagasse as feedstock has been discussed. Finally, the effectiveness of the technique with different feedstocks has been evaluated.

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“…The current scenario of circular economy involves the use of various sources of energy to meet our energy needs. Fossil fuel depletion and global politics has forced researchers to look for sustainable development goals by thinking of alternative fuels [2]. For instance, biodiesel that can be produced from renewable resources with the oil qualities that are similar to diesel fuel, so that direct utilization of these is possible without engine modification [3].…”

Section: Introductionmentioning

confidence: 99%

A Heterogeneous Bifunctional Carbon Nanocatalyst from Plastic Waste to Efficiently Catalyze Waste Cooking Oil into Biodiesel

et al. 2022

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In this study, black carbon derived from polyethylene terephthalate (PET) wastes was utilized as the precursor for heterogeneous bifunctional nanocatalyst, which successively catalyzed waste cooking oil into biodiesel. The nano-sized catalysts were prepared by impregnation method with different heat treatment techniques, such as reflux, hydrothermal, and microwave solvothermal, to provide good distribution of K2O and NiO particles on PET activated carbon mesoporous surface. The sample treated with microwave solvothermal technique (MAC-K2O-NiO) exhibited a high surface area of 120 m2/g with good dispersion of nanoparticles, as shown by FESEM image, large crystallite size of 62.2 nm, and consisted of a highest density of basicity (2.58 mmol/g) and acidity (1.79 mmol/g) for improving transesterification to a maximum yield. The catalytic transesterification of MAC-K2O-NiO was optimized with 3 wt.% of catalyst loading, 18: 1 methanol-oil molar ratio, 65 °C for 3 h of reaction, with a maximum yield of 97.2%. The catalyst reusability was performed, and it was found to maintain the catalytic activity up to six reaction cycles, with a yield of 72.9%. The physiochemical quality of the optimized biodiesel was examined in accordance with the American Society for Testing and Materials, ASTM D6751 testing method.

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System dynamics applied to second generation biofuel in Brazil: A circular economy approach

Cited by 8 publications

References 49 publications

Utility Aspects of Sugarcane Bagasse as a Feedstock for Bioethanol Production: Leading Role of Steam Explosion as a Pretreatment Technique

Utility Aspects of Sugarcane Bagasse as a Feedstock for Bioethanol Production: Leading Role of Steam Explosion as a Pretreatment Technique

Insight into a Steam Explosion Pretreatment of Sugarcane Bagasse for Bioethanol Production

A Heterogeneous Bifunctional Carbon Nanocatalyst from Plastic Waste to Efficiently Catalyze Waste Cooking Oil into Biodiesel

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