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Micro-pyrolysis of technical lignins in a new modular rig and product analysis by GC-MS/FID and GC x GC-TOFMS/FID

Windt, M., Meier, D., Marsman, J. H., Heeres, H. J. & de Koning, S., May-2009, In : Journal of Analytical and Applied Pyrolysis. 85, 1-2, p. 38-46 9 p.

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A new offline-pyrolysis rig has been designed to allow multifunctional experiments for preparative and analytical purposes. The system conditions can be set and monitored, e.g. temperature, its gradients and heat flux. Some special features include ( I) high heating rates up to 120 degrees C/s with pyrolysis temperatures up to 850 degrees C at variable pyrolysis times and (2) the selection of different atmospheres during pyrolysis. A complete mass balance of products and reactants (gas, liquids and solids) by gravimetric methods and sequential chromatographic analyses was obtained.

The pyrolytic behaviour and the decomposition products of lignin-related compounds were studied under different conditions: heating rates (from 2.6 degrees C/s up to 120 degrees C/s), pyrolysis temperatures at 500 degrees C and 800 degrees C in different atmospheres (N(2), H(2), and mixtures of N(2) and acetylene). Kraft lignin, soda lignin, organosolv lignin, pyrolytic lignin from pine bio-oil, residues from biomass hydrolysis and fermentation were studied.

The obtained pyrolysis products were classified into three general groups: coke, liquid phase and gas phase (volatile organic compounds (VOC) and permanent gases). The liquid fraction was analysed by GCMS/FID. In addition, comprehensive two-dimensional CC was applied to further characterise the liquid fraction. VOCs were semi-quantified by a modified headspace technique using GC-MS/FID analysis. The micro-pyrolysis rig proved to be an efficient and useful device for complex pyrolysis applications. (C) 2008 Elsevier B.V. All rights reserved.

Original languageEnglish
Pages (from-to)38-46
Number of pages9
JournalJournal of Analytical and Applied Pyrolysis
Volume85
Issue number1-2
Publication statusPublished - May-2009
Event18th International Symposium on Analytical and Applied Pyrolysis - , Spain
Duration: 18-May-200823-May-2008

Event

18th International Symposium on Analytical and Applied Pyrolysis

18/05/200823/05/2008

Spain

Event: Other

    Keywords

  • Pyrolytic lignin, Bio-oil, Pyrolysis liquids, Pyrolysis-gas chromatography/mass spectrometry, GC x GC-TOFMS/FID, Kraft lignin, Soda lignin, 2-DIMENSIONAL GAS-CHROMATOGRAPHY, CATALYTIC HYDROPYROLYSIS, MASS-SPECTROMETRY, SPECTROSCOPY, ACETYLENE, REACTOR, WOOD, OIL

ID: 4901687