Table 2 Functional group contents and molecular weights of three CWS dispersants
From: Biorefinery lignosulfonates as a dispersant for coal water slurry
Sample | Functional group content (mmol/g) | Molecular weight | ||||
|---|---|---|---|---|---|---|
Sulfonic | Phenolic hydroxyl | Carboxyl | M w | M n | M w /M n | |
Na-LS | 1.44 ± 0.06 | 1.84 ± 0.07 | 2.31 ± 0.10 | 9300 ± 104 | 7735 ± 85 | 1.20 ± 0.03 |
Ca-LS | 1.19 ± 0.07 | 1.65 ± 0.08 | 2.55 ± 0.09 | 8870 ± 123 | 7625 ± 64 | 1.17 ± 0.04 |
FDN | 2.24 ± 0.04 | 0 | 0 | 8100 ± 76 | 7700 ± 46 | 1.05 ± 0.03 |