PYROLYSIS OF KRAFT LIGNIN IN MOLTEN ZNCL2-KCL MEDIA WITH TETRALIN VAPOR ADDITION

Kraft lignin was pyrolyzed in molten salt media of ZnCl2-KCl mixture w ith tetralin vapor added in 0.4 and 4 mol% diluted with N-2 in the tem perature range of 400 to 700 degrees C. The gas chromatographic analys es of pyrolysis products revealed that the yield of H-2 was not increa sed by tetralin vapor addition. This fact implies that the hydrogen ra dical produced from tetralin is consumed in the formation of phenolic compounds and light liquids but not in the formation of H-2. p-Cresol was the most abundant phenolic compound. The yield of total phenolic c ompounds with 4 mol% tetralin vapor added was increased by ca. 80% as compared to that in neat pyrolysis of Kraft lignin.