Catalytic fast pyrolysis of aspen lignin via Py-GC/MS

Zhang, Min; Resende, Fernando L.P.; Moutsoglou, A.

doi:10.1016/j.fuel.2013.07.128

Cited by 148 publications

(109 citation statements)

References 34 publications

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“…In order to overcome this problem, selective pyrolysis of biomass to produce special bio-oils rich in target chemicals has gained increased attention in recent years. Different selective pyrolysis techniques have been proposed to produce valuable chemicals, such as 1-hydroxy-3,6-dioxabicyclo[3.2.1]octan-2-one (LAC) [9,10], furfural (FF) [11][12][13][14], 4-vinyl phenol [15], crotonic acid [16], methanol [17], light furan compounds [18], anhydrooligosaccharides [19], phenolic compounds [20][21][22][23], aromatic hydrocarbons [24][25][26][27], olefins [28], etc. Despite these pioneering techniques, selective pyrolysis of biomass is still in its early stage of development.…”

Section: Introductionmentioning

confidence: 99%

Selective Production of Levoglucosenone from Catalytic Fast Pyrolysis of Biomass Mechanically Mixed with Solid Phosphoric Acid Catalysts

Zhang

Lü

et al. 2015

Bioenerg. Res.

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Solid phosphoric acid (SPA) catalysts with different carriers were prepared and used for catalytic fast pyrolysis of poplar wood to produce levoglucosenone (LGO), a valuable anhydrosugar derivative that can be used in various organic synthesis applications. Pyrolysis-gas chromatography/mass spectrometry (Py-GC/MS) experiments were performed to evaluate the catalytic capabilities of these catalysts under different reaction conditions. The results indicated that SPA catalyst prepared with the SBA-15 carrier exhibited the best catalytic capability for selectively producing LGO. Both the catalytic pyrolysis temperature and catalyst-to-biomass ratio affected the pyrolytic products greatly. The maximal LGO yield reached as high as 8.2 wt% from poplar wood, obtained at the pyrolysis temperature of 300°C and the catalyst-to-biomass ratio of 1. The by-products during the catalytic pyrolysis process were mainly acetic acid (AA) and furfural (FF). In addition, the SPA catalyst possessed better catalytic capability than the liquid phosphoric acid (H 3 PO 4 ) catalyst to produce LGO.

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Section: Introductionmentioning

confidence: 99%

Selective Production of Levoglucosenone from Catalytic Fast Pyrolysis of Biomass Mechanically Mixed with Solid Phosphoric Acid Catalysts

Zhang

Lü

et al. 2015

Bioenerg. Res.

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“…Molecular fragments with the highest intensity from lignin include fragments similar to others mentioned above as well as 46.9 m/z (CH 3 S − ), 63.8 m/z (C 5 H 4 − ), and 54.9 m/z (C 4 H 7 −) relating to aliphatic linkages containing sulfur, and benzenering and hydrocarbon containing species. These observations can also be related to major phenolic compounds observed in literature [12,23,35]. To investigate the degradation of structural components of biomass during pyrolysis, the molecular fragments present in the highest intensity were combined with those observed by others (presented in Table 1) in a set of 32 representative fragments related The six consecutive reactions were also applied to the dynamic traces of the 32 unique ion fragment independently from the weight loss proxy.…”

Section: Component-based Model Fittingmentioning

confidence: 94%

Unified kinetic model for torrefaction–pyrolysis

Klinger

Bar‐Ziv

Shonnard

2015

Fuel Processing Technology

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Thermochemical conversion is a promising pathway to renewable fuels. Torrefaction is the low temperature conversion to a primarily solid fuel, and pyrolysis is a higher temperature process that produces mainly a liquid biooil product. Though these processes are both thermal degradation routes in an inert atmosphere, they are often presented as different processes. A novel six stage consecutive model is proposed to describe a unified view of torrefaction and pyrolysis. The reactions lump chemical species formation in the six reaction stages and represent decomposition of cellulose, hemicellulose, and lignin. Activation energies of 104, 129, 154, 217, 256, and 285 kJ/mol were found through modeling of 32 unique gas-phase species fragments and weight loss dynamics for degradation from 260 to 425°C. It is demonstrated that there is a unified process that occurs, and can describe the degradation of the structural components in biomass. These dynamics yield important insight into the thermal degradation mechanism such as the chemical product detachment dynamics, and the influence of process severity.

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“…Because of the limitations of the experimental setup, this study only discusses the volatile products (Zhang et al 2014). For each sample, the experiment was conducted three times to confirm the repetition.…”

Section: Py-gc/msmentioning

confidence: 99%

Catalytic Stepwise Pyrolysis of Technical Lignin

Shao¹,

You²,

Wang³

et al. 2017

BioResources

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The stepwise pyrolysis of technical lignin with and without a catalyst was investigated by pyrolysis-gas chromatography/mass spectrometry (Py-GC/MS). Lignin was first pyrolyzed at 260 or 360 °C, and then the residue was subsequently pyrolyzed at 650 °C. It was found that stepwise pyrolysis of lignin concentrated the phenolic compounds in lignin-derived bio-oil. In a stepwise 260 to 650 °C process, the maximum total phenolic compounds were 86.2%. Among the phenolic compounds, guaiacol-type and phenol-type phenolic compounds were predominant. Further addition of a catalyst (HZSM-5) in the stepwise pyrolysis process enhanced control over the product distribution through conversion of phenolic compounds into aromatic hydrocarbon products. The aromatic hydrocarbons achieved the highest yield of 30.4% in the catalytic stepwise 260 to 650 °C process.

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Catalytic fast pyrolysis of aspen lignin via Py-GC/MS

Cited by 148 publications

References 34 publications

Selective Production of Levoglucosenone from Catalytic Fast Pyrolysis of Biomass Mechanically Mixed with Solid Phosphoric Acid Catalysts

Selective Production of Levoglucosenone from Catalytic Fast Pyrolysis of Biomass Mechanically Mixed with Solid Phosphoric Acid Catalysts

Unified kinetic model for torrefaction–pyrolysis

Catalytic Stepwise Pyrolysis of Technical Lignin

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