Microwave pyrolysis of cellulose at low temperature

Shra’ah, Ahmad Al; Helleur, Robert

doi:10.1016/j.jaap.2013.10.007

Cited by 59 publications

(18 citation statements)

References 38 publications

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“…The authors increased the production of aromatics by using several metal-containing zeolites (iron-doped HZSM-5, nickel-doped HZSM-5, and iron-/nickel-doped HZSM-5), promoting the aromatization of sugars and anhydrosugars into phenolic compounds through a dehydration route. Contrary to conventional heating processes, MAP of cellulose can occur at lower temperature values, as reported by Al Shra'ah et al [47]. The authors studied MAP of amorphous cellulose in a lab-scale modified organic synthesis unit operating at 455 K. They achieved a bio-oil yield of up to 47 wt.% with a remarkable production of levoglucosan compared with traditional fast pyrolysis run at the temperature of 673 K. Pristine cellulose can be easily replaced by cellulose wastestreams, as reported by Zhang et al [48].…”

Section: Map Of Cellulosementioning

confidence: 77%

A Review of Bio-Oil Production through Microwave-Assisted Pyrolysis

et al. 2021

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The issue of sustainability is a growing concern and has led to many environmentally friendly chemical productions through a great intensification of the use of biomass conversion processes. Thermal conversion of biomass is one of the most attractive tools currently used, and pyrolytic treatments represent the most flexible approach to biomass conversion. In this scenario, microwave-assisted pyrolysis could be a solid choice for the production of multi-chemical mixtures known as bio-oils. Bio-oils could represent a promising new source of high-value species ranging from bioactive chemicals to green solvents. In this review, we have summarized the most recent developments regarding bio-oil production through microwave-induced pyrolytic degradation of biomasses.

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Section: Map Of Cellulosementioning

confidence: 77%

A Review of Bio-Oil Production through Microwave-Assisted Pyrolysis

et al. 2021

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“…On varying the water to disaccharide content (N w � 6.84-30.7), definite relaxation was observed for both disaccharides. e relaxation amplitude at around 1-3 GHz (Δε) was estimated by fitting Debye-type equations (1) and 2 relaxation, Δε � 57 and f � 12 GHz, occurred at N w � 30.7 (r 2 � 0.982). As N w increased beyond 13.6, the characteristic frequency increased from 8 to 12 GHz, indicating the generation of free bulk water.…”

Section: Dielectric Measurementmentioning

confidence: 99%

“…Many researchers have reported that cellulose and oligo-and disaccharides are hydrolyzed to monosaccharides [1][2][3][4][5][6][7]. Because cellulose is present in plant biomass [1], it is a useful resource for the preparation of sugars and other value-added materials. e hydrolysis of cellulose is, in principle, based on the cleavage of the glycosidic bond between monosaccharides and requires acidic conditions [8].…”

Section: Introductionmentioning

confidence: 99%

Kinetic pH Titration to Predict the Acid and Hydrothermal Conditions for the Hydrolysis of Disaccharides: Use of a Microcapillary System

Shimanouchi

Mano

et al. 2019

Journal of Chemistry

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The hydrolysis of disaccharides was conducted using a microcapillary system under hydrothermal conditions (up to 190°C at 10 MPa and pH 4–11). The hydrolysis reaction showed a sigmoidal progression with time, especially under alkaline conditions. Analysis using a kinetic model yielded the reaction induction period. The specific pH value (pHamb) at the induction time, which is the pH value corresponding to the progression of disaccharide hydrolysis, was peculiar to each disaccharide. Finally, the calculation of the electron density around the oxygen atom of the glycosidic bond between saccharides was found to roughly predict the pHamb value required for the progression of hydrolysis.

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“…31] was detected as one of the major products obtained from the pyrolysis of alkali pulp. It has been previously demonstrated that the fast pyrolysis of cellulosic materials resulted in the production of levoglucosan as a major product (Ronsee et al, 2012;Shra'ah et al, 2014).…”

Section: Pyrolysis Of Kenaf Alkali Lignin and Alkali Pulp Obtained Frmentioning

confidence: 99%

Pyrolysis characteristic of kenaf studied with separated tissues, alkali pulp, and alkali lignin

et al. 2015

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HIGHLIGHTS Lignin and pulp prepared from kenaf were pyrolyzed to produce chemicals.Pyrolysates from the alkali lignin of kenaf contained valuable phenols.Pyrolysis of the alkali pulp of kenaf produced levoglucosan in high yields. To estimate the potential of kenaf as a new biomass source, analytical pyrolysis was performed using various kenaf tissues, i.e., alkali lignin and alkali pulp. The distribution of the pyrolysis products from the whole kenaf was similar to that obtained from hardwood, with syringol, 4-vinylsyringol, guaiacol, and 4-vinylguaiacol as the major products. The phenols content in the pyrolysate from the kenaf core was higher than that from the kenaf cuticle, reflecting the higher lignin content of the kenaf core. The ratios of the syringyl and guaiacyl compounds in the pyrolysates from the core and cuticle samples were 2.79 and 6.83, respectively. Levoglucosan was the major pyrolysis product obtained from the kenaf alkali pulp, although glycol aldehyde and acetol were also produced in high yields, as previously observed for other cellulosic materials. Moreover, the pathways for the formation of the major pyrolysis products from alkali lignin and alkali pulp were also described, and new pyrolysis pathways for carbohydrates have been proposed herein. The end groups of carbohydrates bearing hemiacetal groups were subjected to ring opening and then they underwent further reactions, including further thermal degradation or ring reclosing. Variation of the ring-closing position resulted in the production of different compounds, such as furans, furanones, and cyclopentenones. GRAPHICAL ABSTRACT ARTICLE INFO ABSTRACT© 2015 BRTeam. All rights reserved. Kojima et al. / Biofuel Research Journal 8 (2015) 317-323 Please cite this article as: Kojima Y., Kato Y., Akazawa M., Yoon S.L., Lee M.K. Pyrolysis characteristic of kenaf studied with separated tissues, alkali pulp and alkali lignin.

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Microwave pyrolysis of cellulose at low temperature

Cited by 59 publications

References 38 publications

A Review of Bio-Oil Production through Microwave-Assisted Pyrolysis

A Review of Bio-Oil Production through Microwave-Assisted Pyrolysis

Kinetic pH Titration to Predict the Acid and Hydrothermal Conditions for the Hydrolysis of Disaccharides: Use of a Microcapillary System

Pyrolysis characteristic of kenaf studied with separated tissues, alkali pulp, and alkali lignin

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