RefDoc
Haut

Faire une nouvelle recherche
Make a new search
Lancer la recherche


Titre du document / Document title

Xylan hydrolysis in zinc chloride solution

Auteur(s) / Author(s)

CAO N. J. ; XU Q. ; CHEN L. F. ;

Affiliation(s) du ou des auteurs / Author(s) Affiliation(s)

Purdue univ., dep. food sci., West Lafayette IN 47907, ETATS-UNIS

Résumé / Abstract

Xylan is the major component of hemicellulose, which consists of up to one-third of the lignocellulosic biomass. When the zinc chloride solution was used as a pretreatment agent to facilitate cellulose hydrolysis, hemicellulose was hydrolyzed during the pretreatment stage. In this study, xylan was used as a model to study the hydrolysis of hemicellulose in zinc chloride solution. The degradation of xylose that is released from xylan was reduced by the formation of zinc- xylose complex. The xylose yield was > 90% (w/w) at 70°C. The yield and rate of hydrolysis were a function of temperature and the concentration of zinc chloride. The ratio of zinc chloride can be decreased from 9 to 1.3 (w/w). At this ratio, 76% of xylose yield was obtained. When wheat straw was pretreated with a concentrated zinc chloride solution, the hemicellulose hydrolysate contained only xylose and trace amounts of arabinose and oligosaccharides. With this approach, the hemicellulose hydrolysate can be separated from cellulose residue, which would be hydrolyzed subsequently to glucose by acid or enzymes to produce glucose. This production scheme provided a method to produce glucose and xylose in different streams, which can be fermented in separated fermenters.

Revue / Journal Title

Applied biochemistry and biotechnology. Part A : enzyme engineering and biotechnology  

Source / Source

Congrès
Symposium on biotechnology for fuels and chemicals No16, Gatlinburg TN , ETATS-UNIS (09/05/1994)
1995, vol. 51-52 (836 p.)  (15 ref.), pp. 97-104

Langue / Language

Anglais

Editeur / Publisher

Humana Press, Totowa, NJ, ETATS-UNIS  (1994-1996) (Revue)

Mots-clés anglais / English Keywords

Biomass

;

Lignocellulosics

;

Hemicellulose

;

Xylan

;

Chemical pretreatment

;

Zinc Chlorides

;

Xylose

;

Molecular complex

;

Hydrolysis

;

Acidic solution

;

Mots-clés français / French Keywords

Biomasse

;

Lignocellulose

;

Hémicellulose

;

Xylane

;

Prétraitement chimique

;

Zinc Chlorure

;

Xylose

;

Complexe moléculaire

;

Hydrolyse

;

Solution acide

;

Mots-clés espagnols / Spanish Keywords

Biomasa

;

Lignocelulosa

;

Hemicelulosa

;

Xilano

;

Pretratamiento químico

;

Zinc Cloruro

;

Xilosa

;

Complejo molecular

;

Hidrólisis

;

Solución ácida

;

Localisation / Location

INIST-CNRS, Cote INIST : 17423 A, 35400005693818.0080

Nº notice refdoc (ud4) : 3554665



Faire une nouvelle recherche
Make a new search
Lancer la recherche
Bas