| CE | Cellulose |
| CGE | Cold gas efficiency |
| G | Guaiacyl lignin subunit |
| H | p-hydroxyphenyl |
| HDO | Hydrodeoxygenation |
| HHV | Higher heating value |
| LHV | Lower heating value |
| LG | Lignin (Used as a label in figures and tables) |
| MJ | Megajoule |
| PAHs | Polycyclic aromatic hydrocarbons |
| S | Syringyl lignin subunit |
| WGSR | Water–gas shift reaction |