Material | S |
Pore volume (cm3 g−1) |
---|---|---|
Fresh tobacco stem | 0.8047 | 0.0004 |
Treated tobacco stem | 3.2843 | 0.0038 |
Chemicals | Purities | Manufacturer |
---|---|---|
Ethylene glycol | A.R. | Macklin Company |
A.R. | Tianjin Fuyu Company | |
Nicotine | 98% | USP Company |
Solanesol | 95% | Aladdin Company |
H2SO4 | A.R. | LuoYang Haohua Company |
N2 | 99.999% | Bejing Praxair Company |
Tobacco stem | – | China Tobacco Hunan Ind. Co. |
Wheat straw | – | Henan, China |
Corncob | – | Henan, China |
Material | Lignin content (wt/wt) Before treatment | Lignin content (wt/wt) After treatment |
---|---|---|
Wheat straw | 18.50 | 11.23 |
Corncob | 14.15 | 7.91 |
Tobacco stem | 5.15 | 4.44 |
Material | Solanesol content (wt/wt) Before treatment | Solanesol content (wt/wt) After treatment |
---|---|---|
Tobacco stem | 0.18 | 0 |
Wavenumber (cm−1) | Vibration | Assignment |
---|---|---|
3405 | O–H | Phenolic OH + aliphatic OH |
2931 | C–H | CH3 + CH2 |
1737 | C=O | Unconjugated C=O |
1626 | C–C | Aromatic skeleton |
1515 | C–C | Aromatic skeleton |
1428 | C–C | Aromatic skeleton |
1322 | C–O | Syringyl unit of lignin |
1248 | C–O | Guaiacyl unit of lignin |
1063 | C–OH + C–O–C | Aliphatic OH + ether |