Characterization of tobacco lignin preparations by Curie-point pyrolysis-mass spectrometry and Curie-point pyrolysis-high-resolution gas chromatography/mass spectrometry

Scheijen, Martin A.; Boon, Jaap J.; Hass, Werner; Heemann, V.

doi:10.1016/0165-2370(89)85025-9

Cited by 33 publications

(10 citation statements)

References 29 publications

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“…Evaluation of mass spectra was done by comparison with spectral databases like Wiley 6.0 [29], the spectral database of the National Institute of Standards and Technology [30] and the Integrated Spectral Data Base System for Organic Compounds [31]. Reference spectra from literature were also used [9][10][11][12][13][14][15][16][17][18][19]32]. The transfer capillary from the column to the ion trap was heated to 275 8C to prevent eluted compounds from condensing.…”

Section: Bulk Isotope Analysis (Ea-irms)mentioning

confidence: 99%

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δ13C values of pyrolysis products from cellulose and lignin represent the isotope content of their precursors

Steinbeiss

Schmidt

Heide

et al. 2006

Journal of Analytical and Applied Pyrolysis

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Section: Bulk Isotope Analysis (Ea-irms)mentioning

confidence: 99%

“…The pyrolysis of cellulose and lignin is well understood, and most of the products formed have been identified [9][10][11][12][13][14][15][16][17][18][19]. Different possible reaction mechanisms have been proposed for cellulose and lignin [12,17,[20][21][22].…”

Section: Introductionmentioning

confidence: 99%

δ13C values of pyrolysis products from cellulose and lignin represent the isotope content of their precursors

Steinbeiss

Schmidt

Heide

et al. 2006

Journal of Analytical and Applied Pyrolysis

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“…The -OH signicantly decreased at 300 C and completely disappeared at 350 C, implying the oxidation of phenolic hydroxyls to quinone methide structures, followed by the loss of the characteristic phenylpropanoid and its substituents at 400 C. The chemical changes may include the cleavages of intermolecular linkages into small volatile phenol derivatives reported on alkali lignins from tobacco 34 and hardwood. 36 The 63.7 wt% pyrolyzed solid at 500 C gave little evidence of the aromatic skeletal structure and exothermic charring continued with further heating, leaving 60% of the product at 600 C.…”

Section: 35mentioning

confidence: 99%

Ultrafine microporous and mesoporous activated carbon fibers from alkali lignin

Hsieh

2013

J. Mater. Chem. A

113

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A facile and sustainable approach has been successfully devised to fabricate ultrafine (100-500 nm) highly porous activated carbon fibers (ACFs) by electrospinning of aqueous solutions of predominantly alkali lignin (low sulfonate content) followed by simultaneous carbonization and activation at 850 C under N 2 . Incorporating a polyethylene oxide (PEO) carrier with only up to one ninth of lignin not only enabled efficient electrospinning into fibers but also retained fibrous structures during heating, alleviating the need for a separate thermal stabilization step. In situ impregnation of alkali hydroxide activating chemicals with only up to 50% of the lignin carbon precursor, i.e., merely one tenth to one quarter of the quantities used in manufacturing activated carbon particulates, allowed simultaneous carbonization and activation in a single heating step. A range of micropore-dominant to mesoporedominant ACFs were successfully fabricated to achieve superior specific surface (>1400 m 2 g À1) and porosity (>0.7 cm 3 g À1) tuned by varying the type and contents of alkali hydroxides. This streamlined approach was robust and demonstrated the feasibility and versatility in processing and converting a readily available renewable carbon precursor, lignin, into highly porous activated carbon fibers.

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“…The aim of the present work was to assess the changes in the structure of aged lime wood painting supports by analytical pyrolysis-gas chromatography/mass spectrometry (PY-GC/ MS) as a fast, sensitive and good reproducible analytical tool, which is widely used to characterize the structure of different biomass samples [13][14][15][16][17][18][19][20][21][22][23]. Besides PY-GC/MS, ESR-spectroscopy and measurement of the sorption parameters were applied to elucidate the changes in the structure of aged lime wood from old icons.…”

Section: Introductionmentioning

confidence: 99%