Color evolution of poplar wood chips and its response to lignin and extractives changes in autohydrolysis pretreatment

A1 Originalartikel i en vetenskaplig tidskrift (referentgranskad)


Interna författare/redaktörer


Publikationens författare: Wang X., Hou Q., Zhang X., Zhang Y., Liu W., Xu C., Zhang F.
Förläggare: Elsevier B.V.
Publiceringsår: 2019
Tidskrift: International Journal of Biological Macromolecules
ISSN: 18790003 01418130


Abstrakt

Combining chemi-mechanical pulping with autohydrolysis pretreatment is
an efficient and value-added utilization approach for lignocellulosic
biomass in paper industry. To further promote the utilization of
autohydrolyzed biomass in chemi-mechanical pulping, the color evolution
of poplar wood chips in autohydrolysis pretreatment and its chromogenic
mechanism were investigated by using CIELab color system, FT-IR, NMR and
GPC. The results showed that the total color difference ΔE* increased
obviously, which were remarkable as the combined hydrolysis factor (CHF)
increased. The lignin content led to a more significant influence on
the color of poplar wood chips than the extractives. The autohydrolysis
pretreatment with a higher CHF accelerated the degradation and
subsequent condensation of lignin, resulting in the formation of
chromophoric groups, such as Hibbert ketone, quinones and quinone
methides. It is of great significance for biomass refinery and paper
industry to reveal the color evolution of poplar wood chips caused by
autohydrolysis pretreatment from the point of view of chemical
components' structure.


Nyckelord

Chromogenic mechanism, Color evolution

Senast uppdaterad 2020-01-04 vid 08:02