Microwave pyrolysis of Laminaria digitata to produce unique seaweed-derived bio-oils

Kostas, Emily T.; Williams, Orla; Durán-Jiménez, Gabriela; Tapper, Andrew J.; Cooper, Mick; Meehan, Richard R.; Robinson, John P.

doi:10.1016/j.biombioe.2019.04.006

Cited by 36 publications

(18 citation statements)

References 48 publications

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“…2 B). The loss tangent value of the OP at room temperature, around 0.09, is considerably higher compared to other biomass feedstocks including seaweed (L. digitata) [38], pecan nut shell [53] and sycamore [36] which have loss tangent values of 0.01, 0.04 and 0.055, respectively. This may be to the presence of residual oil in the OP that remains with traditional olive oil processing techniques, and usually ranges from around 18 -27 % [54].…”

Section: Biochemical Thermal and Dielectric Characterisationmentioning

confidence: 89%

“…The MW pyrolysis system used in the present study is described in Kostas et al [38] and can be seen in Fig. 1.…”

Section: Microwave Pyrolysis Experimentsmentioning

confidence: 99%

“…Microwave (MW) heating has become an emerging and attractive technology to use for biomass pyrolysis compared to conventional pyrolysis, where the limitations associated with non-efficient energy transfer and slow heating rates are overcome [35,36]. Additionally, the instantaneous volumetric heating and faster processing rates (up to ~200 sec) features associated with MW pyrolysis has the potential to produce range of specific products within the bio-oil fraction that result from the unique thermal gradients obtained in the heated biomass [35,37,38]. This was recently highlighted in a previous study by the authors that revealed the presence of a unique nitrogen-containing compound, L-Proline, 1-methyl-5-oxo-, methylester, in bio-oils generated from the MW pyrolysis of the seaweed Laminaria digitata and its extraction residue [38].…”

Section: Introductionmentioning

confidence: 99%

“…Additionally, the instantaneous volumetric heating and faster processing rates (up to ~200 sec) features associated with MW pyrolysis has the potential to produce range of specific products within the bio-oil fraction that result from the unique thermal gradients obtained in the heated biomass [35,37,38]. This was recently highlighted in a previous study by the authors that revealed the presence of a unique nitrogen-containing compound, L-Proline, 1-methyl-5-oxo-, methylester, in bio-oils generated from the MW pyrolysis of the seaweed Laminaria digitata and its extraction residue [38]. It is believed that the presence of this compound resulted from the inherently low temperatures attained in the MW pyrolysis system that was used and the fact that no MW susceptors were required in the study.…”

Section: Introductionmentioning

confidence: 99%

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Microwave pyrolysis of olive pomace for bio-oil and bio-char production

Kostas

Durán-Jiménez

Shepherd

et al. 2020

Chemical Engineering Journal

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Olive pomace is a widely available agro-industrial waste residue in Europe that has the potential to contribute towards a circular, low carbon bio-economy. This study demonstrated, for the first time, the ability to successfully pyrolyse olive pomace with microwaves for the production of bio-char and bio-oil. It was found that the energy requirement needed to pyrolyse up to 80 % of the olive pomace was as low as 3.6 kJ/g and bio-oil yields up to 30 % were produced. Microwave power did not influence the overall yields or the chemical composition of the obtained bio-oils, but did alter the textural properties of the generated bio-chars and their ability to remove methylene blue dye. Optimum processing conditions were found to be within the 3.6 kJ/g energy requirement with a microwave power of 200 W and processing time of 180 sec. These conditions produced a bio-oil fraction containing mainly acetic acid (71.9 %) and a bio-char with a surface area of 392.3 m 2 /g, micropore volume of 0.15 cm 3 /g and a methylene blue removal efficiency of 40 qMB mg/g. The results acquired from this study reveal the superiority of microwave heating in a pyrolysis system and highlight a novel and prospective route for added value recovery from natural waste resources like olive pomace.

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Section: Biochemical Thermal and Dielectric Characterisationmentioning

confidence: 89%

“…The MW pyrolysis system used in the present study is described in Kostas et al [38] and can be seen in Fig. 1.…”

Section: Microwave Pyrolysis Experimentsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Microwave pyrolysis of olive pomace for bio-oil and bio-char production

Kostas

Durán-Jiménez

Shepherd

et al. 2020

Chemical Engineering Journal

Self Cite

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“…Reddy et al has also reported that MAP provides a rapid, selective, and non-contacting energy transfer [13]. MAP has recently applied for several process of decomposing biomass or other complex materials into various products, such as the conversion of rise husk to biochar [12], fiberboard to biochar [14], coal to blue-coke, coal-tar, and pyrolysis water [15], waste plastics and used cooking oil to liquid oil [16], bamboo into carbon fiber [17], Lignin to bio-oil [18], palm oil fiber to liquid oil [19] and Laminaria digitata seaweed to bio-oil [20]. Nonetheless, the application of MAP for converting coconut shell into biochar has not been investigated yet.…”

Section: Introductionmentioning

confidence: 99%

Methylene Blue Removal Using Coconut Shell Biochar Synthesized Through Microwave-Assisted Pyrolysis

et al. 2020

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Indonesia is the world’s second largest producer of coconut. This at the same time resulted in huge generation of coconut shell waste that need to be properly managed to prevent environmental contamination such as water, air and soil pollution. Current techniques of physical and thermal processing are time and energy consuming. This study reports on the conversion of coconut shell biomass into biochar using microwave-assisted pyrolysis (MAP). The MAP processes were carried out at different microwave power (550-650W) and residence time (15-25 minutes). Two of the highest biochar yields were obtained at 550W with the residence times of 15 minutes (91.31 wt%, termed as S1) and 20 minutes (83.88 wt%, termed as S2), respectively. Both values were higher than biochar yield obtained using conventional pyrolysis process i.e. 30.10 wt%. Both S1 and S2 showed considerable capacity to remove 0.6875 mg.g-1 and 0.5165 mg.g-1 methylene blue which had the initial concentration of 25 mg.L-1. The adsorption efficiencies of S1 and S2 biochars were 55.00% and 41.32%, respectively. Results obtained from the FTIR, FESEM and BET analysis also supported the methylene blue removal properties of both S1 and S2, respectively. As a conclusion, coconut shell showed potential as a useful raw material to produce biochar that can be used for methylene blue removal from solution. Nevertheless, more investigation need to be carried out prior to commercialization venture of the coconut-shell based biochar.

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Prediction of Biomass Pyrolysis Mechanisms and Kinetics: Application of the Kalman Filter

2021

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In order to predict the pyrolysis mechanisms of four different biomasses (Asbos (Psilocaulon utile), Kraalbos (Galenia africane), Scholtzbos (Pteronia pallens), and palm shell), a novel method called Kalman filter was investigated and the results were compared by regression analysis. Both analyses were applied to five different generalized biomass pyrolysis models consisting of parallel and serial irreversible-reversible reaction steps. The models consisting of reversible reactions in addition to parallel pyrolysis steps demonstrated a better fit with the experimental results. The pyrolysis step from biomass to bio-oil has the highest reaction rates compared with the other pyrolysis steps defined in the models. The Kalman filter is thus defined as a promising filtering and prediction method for the estimation of detailed pyrolysis mechanisms and model parameters, using minimum experimental data.

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Microwave pyrolysis of Laminaria digitata to produce unique seaweed-derived bio-oils

Cited by 36 publications

References 48 publications

Microwave pyrolysis of olive pomace for bio-oil and bio-char production

Microwave pyrolysis of olive pomace for bio-oil and bio-char production

Methylene Blue Removal Using Coconut Shell Biochar Synthesized Through Microwave-Assisted Pyrolysis

Prediction of Biomass Pyrolysis Mechanisms and Kinetics: Application of the Kalman Filter

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