Detection of reactive intermediates from and characterization of biomass char by laser pyrolysis molecular beam mass spectroscopy

Herring, Andrew M.; McKinnon, J. Thomas; Gneshin, Keith W.; Pavelka, Ryan A.; Petrick, David E.; McCloskey, Bryan D.; Filley, Jonathan

doi:10.1016/j.fuel.2003.12.014

Cited by 25 publications

(17 citation statements)

References 35 publications

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“…Miura et al located aliphatic CH vibrations at 2920 cm −1 and 2993 cm −1 and aromatic CH vibrations at 3050 cm −1 . Fanning et al found CH vibrations in a range of 2600 cm −1 and 3000 cm −1 and Herring et al assigned the band at 2837 cm −1 to a v ‐(O–CH 3 ) vibration , . In relation of temperature treatment, a rise of bands above 3000 cm −1 and a decline of bands below 3000 cm −1 can be observed (Fig.…”

Section: Resultsmentioning

confidence: 98%

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Hydrothermal Carbonization of Lignin with Vanillin as a Model Component

et al. 2017

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Hydrothermal carbonization (HTC) is one possibility to concentrate energy of wet biomass in so‐called hydrochar. To design technical HTC reactors in a rational way, the reaction kinetics of the four main components of biomass, i.e., carbohydrates, lignin, fats/oils, and proteins, should be known. To determine the kinetics of hydrochar functionalization, initially an appropriate analytical method must be developed. In the presented experiments, the hydrochar obtained by HTC of vanillin is investigated by diffuse reflectance infrared (IR) Fourier transform spectroscopy (DRIFTS). In order to assign the IR bands in the DRIFT spectra to different functional groups, temperature‐programmed desorption (TPD) experiments are conducted, followed by a combination of DRIFTS and TPD. This TPD/DRIFT combination is applied as an analytical method to investigate the kinetics of hydrochar functionalization during HTC.

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Section: Resultsmentioning

confidence: 98%

“…The combination of these integrals of DRIFT bands with the results of TPD experiments pleads for aromatization reactions during the temperature treatment. So, the published allocation of DRIFTS bands can be transferred to vanillin‐hydrochar . The DRIFTS band allocation of hydrothermal carbonized vanillin is summarized in Tab.…”

Section: Resultsmentioning

confidence: 99%

Hydrothermal Carbonization of Lignin with Vanillin as a Model Component

et al. 2017

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“…The suggestion that degradation of biomass occurs via methylidene free radicals could not be confirmed within this study; however, it has been proposed elsewhere that free radicals arise (at experimental temperature 375 ∘ C) in the ionisation region of the mass spectrometer detector. These are formed as a result of demethylation of biomass biopolymers en route to formation of polyaromatic hydrocarbons [13]. Furthermore, a study of the pyrolysis of birch [14] shows similar degradation of cellulose to yield predominant formation of water, carbon monoxide, and carbon dioxide.…”

Section: Resultsmentioning

confidence: 99%

Thermal with Mass Spectroscopic Analysis of Wood and Cereal Biomass Torrefaction

Laryea-Goldsmith

Woolard

2013

ISRN Renewable Energy

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Torrefaction is a mild form of pyrolysis that, when applied to biomass, has the effect of improving the energy density of biomass-derived solid fuels. In this study, thermogravimetric analysis (coupled with mass spectrometry) was applied to two biomass fuels (pine wood and white maize ear) to investigate a potential representative torrefaction thermal treatment process. The mass loss from the torrefaction process was indicative of emission of aliphatic hydrocarbons, evidenced by mass spectroscopic data and it is evident that optimal torrefaction conditions are determined by the type of biomass to which torrefaction processing is applied.

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“…It became sharper and stronger after hydrolysis, but weaker after bleaching. The band at 897 cm À1 was assigned to CH 2 wagging from carbohydrates (Pandey, 1999;Herring et al, 2004). Its relative intensity was strong in UTR and BL, but almost disappeared in HHY and no signal in LIG.…”

Section: Driftmentioning

confidence: 98%

“…The band at 1462 cm À1 was assigned to CH deformation in methyl and methylene in syringyl unit from lignin (Herring et al, 2004). It became sharper and stronger after hydrolysis, but weaker after bleaching.…”

Section: Driftmentioning

confidence: 99%

Sorption of copper by chemically modified aspen wood fibers

Huang

Boving

et al. 2009

Chemosphere

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a b s t r a c tSorption of copper (Cu 2+ ) by untreated and treated (bleaching and hydrolysis) aspen wood fibers, cellulose and lignin was examined to understand the Cu 2+ sorption behavior by these natural sorbents. All sorbents were characterized by solid-state 13 C NMR and FTIR. Bleaching broke up aromatic structures and increased hydrophilicity of the fibers, whereas hydrolysis decreased carbohydrate content, producing a more hydrophobic structure. Copper sorption was a function of pH; the percentage of Cu 2+ sorption steadily increased from pH 1.5 to 4.5 with a maximum sorption amount at around pH 5.5 for all the materials.

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Detection of reactive intermediates from and characterization of biomass char by laser pyrolysis molecular beam mass spectroscopy

Cited by 25 publications

References 35 publications

Hydrothermal Carbonization of Lignin with Vanillin as a Model Component

Hydrothermal Carbonization of Lignin with Vanillin as a Model Component

Thermal with Mass Spectroscopic Analysis of Wood and Cereal Biomass Torrefaction

Sorption of copper by chemically modified aspen wood fibers

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