Bio-Oil Viscosity of Sisal Residue: Process and Temperature Influence

Pereira, Luis Gabriel Gomes; Pires, C. A. M.

doi:10.1021/acs.energyfuels.7b03658

Cited by 11 publications

(9 citation statements)

References 32 publications

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“…When the influence of the waste material on the viscosity was compared, it was observed that lower viscosity was obtained for the co-pyrolysis of GS and PS than for the GS and WT mixtures using the same catalyst, Carmeuse, indicating that this polymer, PS, improved the quality of the oil obtained versus the WT. As the bio-oil viscosity is widely dependent on the feedstock and pyrolysis conditions, 42,43 this improvement in the viscosity for the co-pyrolysis experiments could be explained based, on the one hand, on the feedstock (PS consists of volatile matter and almost no fixed carbon (Table 1), whereas that WT is made of styrene−butadiene copolymer, natural rubber, and polybutadiene) and, on the other hand, on the nature and chemical composition of the bio-oils as shown in the next paragraphs.…”

Section: Resultsmentioning

confidence: 99%

Properties and Combustion Characteristics of Bio-Oils from Catalytic Co-Pyrolysis of Grape Seeds, Polystyrene, and Waste Tires

et al. 2020

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This work aims to study the bio-oils obtained from the catalytic co-pyrolysis of waste polymers and a residual biomass (grape seeds, GS). For that purpose, the organic liquid fractions produced in an auger reactor were thoroughly characterized in two steps, obtaining in the first place their main physicochemical properties as well as their chemical compositions, and second, their droplet combustion behaviors. Both the polymer type (waste tires or polystyrene, WT and PS, respectively) and the nature of the low-cost, calcium-based catalyst used (Carmeuse limestone, calcined dolomite, or an inert material such as sand) were studied. A significant improvement in the physicochemical properties of the bio-oils was obtained when using a catalyst, with lower viscosity, density, and oxygen content. These beneficial effects were more marked for the bio-oil produced with the Carmeuse catalyst, presumably due to the higher prevalence of aromatization and hydro-deoxygenation reactions. When changing the polymer source from WT to PS, a considerable increase in the aromatic content and a viscosity reduction were noted. The droplet combustion tests revealed the consistent occurrence of microexplosions for all of the studied bio-liquids, these bursting events being more violent for the GS−PS oil. Regarding the evaporation behavior, this liquid also yielded significantly higher burning rates during the initial heatup phase, in agreement with its richer composition in volatile compounds such as styrene. These results point to this fuel as the one with the best global combustion behavior from all of the explored bio-oils. The GS−WT liquids showed much closer features among them, although with noticeable differences depending on the catalyst used. A more volatile behavior was observed for GS−WT Carmeuse, followed by GS−WT dolomite and GS−WT sand, strengthening thus the previously reported improvements in physicochemical properties. Finally, the propensity to form soot of these bio-oils was characterized through a soot probe, which revealed a higher soot yield for the bio-liquids produced with the Carmeuse catalyst.

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Section: Resultsmentioning

confidence: 99%

Properties and Combustion Characteristics of Bio-Oils from Catalytic Co-Pyrolysis of Grape Seeds, Polystyrene, and Waste Tires

et al. 2020

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“…Bio-oil of the sisal residue has characteristics of heavy bio-oil (Figure ), the formation of which derived partially from lignin, which is the most abundant polymer of the sisal residue (Table ). The bio-oil yields have been reported in the literature as light and heavy fractions. − Table shows that the heavy bio-oil yield varied between 14.3% and 79%, depending on the type of biomass and variation of pyrolysis temperature. Although the higher yields of the sisal residue bio-oil are in the range of heavy fractions, the absence of the aqueous phase is not common in relation to those produced by another biomass.…”

Section: Resultsmentioning

confidence: 99%

“…26 This effect is in agreement with the surface behavior shown in Figure 6, that even at temperatures above 500 °C, bio-oil production increases with increasing biomass flow rate due to the decrease in the solid-to-solid heat rate. In addition, increasing the biomass flow rate increased the residence time of the organic molecules, 43 contributing to the increase and decrease of the yields of heavy and light fractions, respectively. 44 Bio-oil of the sisal residue has characteristics of heavy bio-oil (Figure 7), the formation of which derived partially from lignin, 44 which is the most abundant polymer of the sisal residue (Table 2).…”

Section: Energy and Fuelsmentioning

confidence: 99%

“…Although the higher yields of the sisal residue bio-oil are in the range of heavy fractions, the absence of the aqueous phase is not common in relation to those produced by another biomass. According to Pereira and Pires, 43 the bio-oil produced from sisal residue had high viscosity at room temperature due to the chemical characteristics of the biomass.…”

Section: Energy and Fuelsmentioning

confidence: 99%

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Fast Pyrolysis of Sisal Residue in a Pilot Fluidized Bed Reactor

et al. 2018

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The objective of this research was to study the fast pyrolysis of sisal residue, performed in a pilot unit with a fluidized bed reactor. The tests were carried out by varying the flows of nitrogen (8−14 N m 3 /h), biomass (10.33−25.95 g/ min), and temperature (450−550°C). The experimental planning technique was used to identify the number of tests and the influence of operational variables on the bio-oil yield. One of the highest H 2 /CO (2.16) ratios was found from the eighth test on, which was an appropriate value for the production of methanol and liquid biofuels. All bio-oil samples produced were characterized, and the results showed that the sisal residue bio-oil is different from other bio-oils reported in the literature. It has high viscosity at room temperature, with a pour point of 55°C and average molecular weight of 414.2 g/mol. In addition, phenolic species completely prevail in relation to the other monomeric components. The biochar obtained is an amorphous, fine powder. Despite the porosity, its specific surface area is lower than of commercial activated carbon.

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“…The relationship between the dependent variable S (ou Uff) is complex, and the interaction effects must be teased out using statistical analysis [18,19]. The response surface methodology (RSM) consists of graphically representing each parameter's influence and their interactions in the results, which can be used to derive the ideal conditions to improve the process [18].…”

Section: Fig 3 Fluidization With Segregationmentioning

confidence: 99%

Study of The Biomass, Sand, and Biochar Fluidization in A Typical Bed of Fast Pyrolysis

Vasconcelos

Júnior

Simonelli

et al. 2021

Preprint

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Biomass pyrolysis usually occurs in a fluidized bed reactor formed by sand, biomass, and biochar. Dynamics this fluidization differs from that of literature because the biomass is converted continually in biochar. In this study, a series of experiments have been carried out for ternary mixtures of sand, sisal residue, and biochar, varying the compositions and particle size. The tests were based on two simplification hypotheses (steady state and room temperature) due to fast biomass transformation in bed and low Van der Waals force to large particles. The dynamic characteristics determined included the bed pressure drop and bed fluctuation. The single and combined effects of particle size and composition on the final fluidization velocity (Uff) and particle segregation (S) have been analyzed using response surface (RSM). The Uff and S minimum values were found when the variables were in the smallest particle size and composition levels. New correlations were developed for predicting the values of Uff. The error from measured values when using the new correlation was 7.6%, while the literature equation was 9.7%. The present correlations predicted reasonably well predicted the Uff of ternary mixtures in the fast pyrolysis bed.

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Bio-Oil Viscosity of Sisal Residue: Process and Temperature Influence

Cited by 11 publications

References 32 publications

Properties and Combustion Characteristics of Bio-Oils from Catalytic Co-Pyrolysis of Grape Seeds, Polystyrene, and Waste Tires

Properties and Combustion Characteristics of Bio-Oils from Catalytic Co-Pyrolysis of Grape Seeds, Polystyrene, and Waste Tires

Fast Pyrolysis of Sisal Residue in a Pilot Fluidized Bed Reactor

Study of The Biomass, Sand, and Biochar Fluidization in A Typical Bed of Fast Pyrolysis

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