Table 2 Chemical shifts and integration regions for pyrolysis oil derivatized with TMDP in a quantitative 31 P NMR
From: The use of combination of zeolites to pursue integrated refined pyrolysis oil from kraft lignin
Functional group | Integration region (ppm) | |
|---|---|---|
endo-N-hydroxy-5-norbornene-2,3-dicarboximide (NHND, internal standard) | 151.0 - 152.8 | |
Aliphatic OH | 150.0 - 145.5 | |
C5 substituted guaiacyl phenolic OH | β-5 | 144.7 - 142.8 |
4-O-5 | 142.8 - 141.7 | |
5-5 | 141.7 - 140.2 | |
Guaiacyl phenolic OH | 140.2 - 139.0 | |
Catechol type OH | 139.0 - 138.2 | |
p-hydroxy-phenyl OH | 138.2 - 137.3 | |
Carboxylic acid-OH | 136.6 - 133.6 | |