Table 2 Properties of hydrolysis and soda liquors at different temperatures and residence times
From: A process for producing lignin and volatile compounds from hydrolysis liquor
Sample ID | Temp.,°C | Time, min | pH | Hydrolysis liquor | Soda liquor lignin | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Mono sugar | Polysugar | Hydrolysis lignin | Furfural | Acetic acid | ||||||||||||||
g/L | %a | g/L | % | Mw, g/mol | g/L | %a | Mw, g/mol | g/L | %a | g/L | %a | g/L | %a | Mw, g/mol | ||||
1 | 170 | 15 | 3.46 | 3.79 | 1.9 | 11.85 | 5.9 | 1135 | 11.6 | 5.7 | 21,902 | 0.32 | 0.2 | 1.16 | 0.6 | 0.8 | 0.6 | 2977 |
2 | 180 | 15 | 3.39 | 5.93 | 3.2 | 16.75 | 9.0 | 823 | 11.8 | 6.3 | 21,201 | 0.69 | 0.4 | 1.20 | 0.6 | 0.9 | 0.7 | 3239 |
3 | 190 | 15 | 3.48 | 12.52 | 6.1 | 7.61 | 3.7 | 526 | 14.3 | 7.0 | 20,166 | 3.86 | 1.9 | 1.32 | 0.6 | 2.7 | 2.1 | 3120 |
4 | 170 | 45 | 3.53 | 5.25 | 2.9 | 14.87 | 8.2 | 881 | 10.7 | 5.9 | 23,609 | 0.44 | 0.2 | 1.25 | 0.7 | 0.9 | 0.7 | 2620 |
5 | 180 | 45 | 3.37 | 10.70 | 5.8 | 15.89 | 8.7 | 527 | 11.0 | 6.0 | 22,324 | 1.21 | 0.7 | 1.24 | 0.7 | 1.4 | 1.1 | 2725 |
6 | 190 | 45 | 3.21 | 12.91 | 6.8 | 6.13 | 3.3 | 504 | 14.0 | 7.4 | 22,559 | 4.5 | 2.4 | 0.89 | 0.5 | 2.0 | 1.6 | 2786 |