BioChem - DOS

Effects of aluminum chloride-catalyzed hydrothermal pretreatment on the structural characteristics of lignin and enzymatic hydrolysis

Bioresource technology : biomass, bioenergy, biowastes, conversion technologies, biotransformations, production technologies

Shen, X.J.; Wang, B.; Huang, P.L.; Wen, J.L.; Sun, R.C.

In this study, Eucalyptus camaldulensis was pretreated with 0.02M aluminum chloride (AlCl<SUB>3</SUB>) at 140-180<SUP>o</SUP>C to obtain digestible substrates for glucose and lignin. The effects of AlCl<SUB>3</SUB>-catalyzed hydrothermal pretreatment on the degradation of carbohydrates, structural changes of lignin, crystallinity, morphologic changes, and cellulose conversion of the pretreated biomass have been investigated by HAPEC, HPLC, FT-IR, XRD, CP/MAS NMR, SEM, and 2D-HSQC NMR. Results showed that the pretreatment significantly removed hemicelluloses and cleaved &beta;-O-4 linkages of lignin at high temperatures. Under an optimum condition (at 170<SUP>o</SUP>C for 1h), almost all of hemicelluloses were removed and most of &beta;-O-4 linkages in lignin were cleaved, and 77.8% cellulose conversion of the pretreated biomass was achieved, which was 7.3-fold higher than that of the original biomass. In short, this process was regarded as a promising approach to achieve an efficient conversion of lignocellulosic biomass to fermentable glucose and residual lignin.

2016

Elsevier Applied Science

0960-8524

206

pp.57-64

10.1016/j.biortech.2016.01.031

http://click.ndsl.kr/servlet/OpenAPIDetailView?keyValue=05787966&target=NART&cn=NART75053116

Eucalyptus camaldulensis; AlCl3-catalyzed hydrothermal pretreatment; Enzymatic saccharification; Lignin; Structural features