Skip to main content

Table 2 Resonance assignments for the CP/MAS 13C solid-state NMR spectra of the pretreated and raw PH

From: Production of isoprene, one of the high-density fuel precursors, from peanut hull using the high-efficient lignin-removal pretreatment method

No.

Chemical shift (ppm)

Functional group

173.80

Acetate (C=O) of hemicellulose

130–155

aromatic groups of lignin

105.53

C1 cellulose

89.23

C4 crystalline cellulose

84.00

C4 amorphous cellulose

72.89–75.38

C2, 5, C3 of hemicellulose and cellulose

65.06

C6 crystalline cellulose

63.20

C6 amorphous cellulose

56.11

OMe of lignin

21.42

Acetate (CH3) of hemicellulose