Fast pyrolysis as a tool for obtaining levoglucosan after pretreatment of biomass with niobium catalysts

David, Geraldo Ferreira; Pereira, Sarah de Paiva Silva; Fernandes, Sérgio Antônio; Cubides-Román, Diana C.; Siqueira, Rogério Krohling; Pérez, Víctor Haber; Lacerda, Valdemar

doi:10.1016/j.wasman.2021.03.016

Cited by 21 publications

(5 citation statements)

References 84 publications

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“…Many high-value anhydrosugars or furan products, such as 1,4:3,6-dianhydro-α- d -glucopyranose (DGP), levoglucosenone (LGO), and furfural (FF), can be selectively produced through the pyrolysis of biomass, particularly from the cellulose component. − A suitable acidic environment has been identified as a crucial factor for selectively producing the above products. − Branca et al , investigated various liquid inorganic acids/salts and discovered that H 2 SO 4 , Fe 2 (SO 4 ) 3 , and ZnCl 2 promoted the catalytic pyrolysis of corn cobs and cellulose to form FF. When H 3 PO 4 was employed in the catalytic process of cellulose, LGO became the dominant product, accompanied by the formation of DGP as a byproduct with a negligible yield .…”

Section: Introductionmentioning

confidence: 99%

Coproduction of 1,4:3,6-Dianhydro-α-d-glucopyranose, Furfural, and Formic Acid through Oxalic Acid-Assisted Staged Fast Pyrolysis of Cellulose

Zhao,

Fu,

Xia

et al. 2024

Energy Fuels

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Pyrolysis is a promising thermochemical conversion technology, which can convert biomass and cellulose into value-added products. Herein, a new approach of oxalic acid-assisted staged fast pyrolysis (OASFP) of cellulose was developed, achieving the coproduction of 1,4:3,6-dianhydro-α-D-glucopyranose (DGP), furfural (FF), and formic acid (FA) in separated pyrolysis stages. The lab-scale tests demonstrated that a selectivity of 71.6% and a yield of 31.5 wt % for FA in the aqueous phase, as well as a selectivity of 55.6% and a yield of 1.2 wt % for FF in the organic phase, were achieved in the primary pyrolysis stage under the optimized conditions (primary pyrolysis temperature of 220 °C and cellulose-to-oxalic acid (OA) ratio of 1:3). During the subsequent secondary pyrolysis process at 400 °C, the decomposition of the solid residue achieved a yield of 7.2 wt % and a selectivity of 32.7% for DGP. The interaction between OA and cellulose during the primary pyrolysis stage was essential for DGP generation. The formation mechanism of major products and the role of OA were revealed based on experiments and density functional theory calculations. In total, the OASFP of cellulose offers new possibilities and opportunities for biomass utilization.

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Section: Introductionmentioning

confidence: 99%

Coproduction of 1,4:3,6-Dianhydro-α-d-glucopyranose, Furfural, and Formic Acid through Oxalic Acid-Assisted Staged Fast Pyrolysis of Cellulose

Zhao,

Fu,

Xia

et al. 2024

Energy Fuels

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“…Analytical pyrolysis is a technique to characterize materials in the absence of oxygen by chemical degradation reactions induced by thermal energy (Del Rio et al 2001;Wang et al 2017). This technique uses a set of small molecular species, separated by gas chromatography and segregating products from pyrolysis (David et al 2021).…”

Section: Introductionmentioning

confidence: 99%

Heartwood and Sapwood of Tectona grandis wood characterized by CG/MS-PY

Castro

Surdi

Fernandes

et al. 2022

Preprint

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Teak wood has a high market value, being used for the manufacture of furniture, naval industry and others. Its wood presents high dimensional stability, resistance to xylophagous organisms and important phytochemical and pharmacological chemical compounds, which can enhance the use of its wood in the pharmaceutical industry. Color differences between the heartwood and sapwood of the teak wood are due to chemical components that need further studies. Heartwood and sapwood of T. grandis (teak), 15 years-old, were characterized by Py-CG/MS analysis and syringyl (S)/guaiacyl (G) ratio was evaluated. Heartwood and sapwood were pyrolyzed at 550°C and 62 and 51 compounds were identified from them, respectively. The largest number of compounds in the heartwood is due to the deposition of extractives during its formation. The organic compounds identified include 2-methylanthraquinone as one of the main component responsible for the resistance of the teak wood to biological factors (fungi and termites). The syringyl (S)/guaiacyl (G) ratio of heartwood and sapwood was 0.51 and 0.50, respectively.

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“…Analytical pyrolysis is a technique to characterize materials in the absence of oxygen by chemical degradation reactions induced by thermal energy 9 . This technique uses a set of small molecular species, separated by gas chromatography and segregating products from pyrolysis 10 .…”

Section: Introductionmentioning

confidence: 99%

Chemical composition of heartwood and sapwood of Tectona grandis characterized by CG/MS-PY

Castro

Surdi

Fernandes

et al. 2022

Sci Rep

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Teak wood has chemical compounds that can be used for pharmaceutical and textile industries, in addition, this compounds are related to resistance to biodeterioration, color and modification processes. Heartwood and sapwood of T. grandis (teak), 15 years-old, were characterized by Py-CG/MS analysis and syringyl (S)/guaiacyl (G) ratio was evaluated. Heartwood and sapwood were pyrolyzed at 550 °C and 62 and 51 compounds were identified from them, respectively. The acetic acid (10%) and levoglucosan (26.65%) were the most abundant compound in the sapwood and heartwood, respectively. The high acetic acid content enhances the use of teak wood to production of artificial essences for perfumery, paints, dyes. While levoglucosan can be used in the manufacture of epoxy resins, antiparasitic and insecticides. The organic compounds identified include 2-methylanthraquinone as one of the main component responsible for the resistance of the teak wood to biological factors (fungi and termites). The syringyl (S)/guaiacyl (G) ratio of heartwood and sapwood was 0.51 and 0.50, respectively.

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Fast pyrolysis as a tool for obtaining levoglucosan after pretreatment of biomass with niobium catalysts

Cited by 21 publications

References 84 publications

Coproduction of 1,4:3,6-Dianhydro-α-d-glucopyranose, Furfural, and Formic Acid through Oxalic Acid-Assisted Staged Fast Pyrolysis of Cellulose

Coproduction of 1,4:3,6-Dianhydro-α-d-glucopyranose, Furfural, and Formic Acid through Oxalic Acid-Assisted Staged Fast Pyrolysis of Cellulose

Heartwood and Sapwood of Tectona grandis wood characterized by CG/MS-PY

Chemical composition of heartwood and sapwood of Tectona grandis characterized by CG/MS-PY

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