| 초록 |
Currently, most of the lignin produced in the pulping process is used almost as internal fuel. However, pulp mills have a surplus of energy, which provides them the opportunity to extract lignin and use it as a new source of special chemicals as well as fuel. In this work, the three kinds of various lignin were investigated in terms of structural properties and then, the relationship between structural properties of lignin and bio-oil productivity through hydrothermal liquefaction was evaluated. The chemical composition, structure, molecular weight, and thermal properties of lignin samples were analyzed using NMR, FTIR, GC/MS, EA and TGA. The hydrothermal liquefaction process was conducted at 350 °C for 30 min to produce bio-oil. The high potential of lignin and bio-oil as aromatic sources in the chemical industry will be explained, and these studies can reveal the value of lignin. |
