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Article Dans Une Revue Journal of Analytical and Applied Pyrolysis Année : 2016

Micropyrolysis of natural poplar mutants with altered p-hydroxyphenyl lignin content

Résumé

Analytical pyrolysis coupled to GC MS (Py-GC-MS) was applied for the thermochemical degradation analysis of wood from poplar (Populus nigra) defective in p-HYDROXYCINNAMOYL-CoA:SHIKIMATE p-HYDROXYCINNAMOYL TRANSFERASE 1 (HCT1), an enzyme essential in the biosynthesis of guaiacyl and syringyl units in lignin. The aim of this study was to assess the potential of natural poplar trees with characteristic lignin composition to improve the yield of valuable chemicals in biomass fast pyrolysis, with a focus on phenolic product formation during lignin decomposition. Analysis of the fast pyrolysis vapor phase obtained from the lignocellulosic biomass of trees homozygous for the defective PnHCT1-Delta 73 allele revealed significant shifts in the spectrum of lignin-derived pyrolytic compounds as compared to wild type and heterozygous trees. More particular for the homozygotes, a higher production of the non-methoxylated p-hydroxycinnamic alcohol (p-coumaryl alcohol) and 2,3-dihydrobenzofuran was detected at the expense of mono-methoxylated phenols. Correlation analysis also suggested further decomposition reactions such as demethoxylation, demethylation and alkylation of the mono and di-methoxylated phenolic moieties during pyrolysis, giving rise to a remarkable amount of non-methoxylated phenols in the pyrolytic spectrum. (C) 2016 Elsevier B.V. All rights reserved.
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Dates et versions

hal-01602454 , version 1 (02-10-2017)

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Jop Vercruysse, Andries Poupaert, Ruben Vanholme, Catherine Bastien, Bartel Vanholme, et al.. Micropyrolysis of natural poplar mutants with altered p-hydroxyphenyl lignin content. Journal of Analytical and Applied Pyrolysis, 2016, 122, pp.377 - 386. ⟨10.1016/j.jaap.2016.08.021⟩. ⟨hal-01602454⟩
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