Analytical study on liquid products from populus tomentosa black liquor pyrolysis

The aim of the research is to study liquid products obtained from black liquor pyrolysis qualitatively and quantitatively with gas chromatographic/mass spectrometric. Liquid products such as phenols, ketones, olefinic matters and esters were obtained by the self-made reactor under ideal condition. The species of the liquid products grew with the pyrolysis temperature. There were 28 kinds of liquid products when the temperature reached to 773K. The study centered on the percentage of phenolics of different pyrolysis temperature. The analysis of pyrograms showed that the yield of Guaiacol decreased significantly before 743K. When the temperature was 743K, the percentage of Phenol, O-cresol and M-cresol was highest with 9.15%, 26.54% and 27.16% respectively.