Qu et. extracted lignin via the pyrolysis of the oil from the red oak. After that, volatile contaminants were eliminated using three washes with toluene at a mass ratio of 1:1, and the mixture was repolymerized using 0.5% sulfuric acid. Treatment with an acid catalyst influences the precursor's thermal stability and glass transition temperature. Pyrolytic lignin was solid with a Tg of 101°C and an average molecular mass of 1267 Da. At a temperature of 115 to 120°C, the lignin was subjected to melt spinning. Subsequently, the precursor fibers were thermostabilized at 280 C at 0.3°C/min. Finally, up to 1000°C, the fibers underwent carbonization at a rate of 3°C/min. The synthesized carbon fiber possesses the tensile strength and modulus of 1014Gpa and 122 Gpa, respectively, which was the highest among the ligninbased carbon fibers Zhang et. used softwood kraft lignin (SKL) for the experimentation. The hydroxyl group of lignin was partially acetylated using a small amount of acetic anhydride (0.66 ml Ac2O/g SKL) for 15 minutes. Partial acetylation is performed to facilitate dry spinning of the precursor, and using acetone as a solvent, the precursor was dry-spun. Then, the fibers were thermostabilized at 220°C and 0.2°C/min under tension, followed by carbonization at 1000°C at 4.5°C/min. Compared to melt-spun carbon fibers derived from lignin, these fibers have 35% higher surface area. Additionally, these fibers have a reactive surface. Therefore, high-strength fiber matrix bonds can form when these fibers are used in polymer matrix composites.