Research on pyrolysis technology of industrial alkali lignin and its economic analysis

The patterns of pyrolysis products distribution from technical alkali lignin under different temperature were studied using high heat pyrolysis bed designed by ourselves. The composition of liquid products (pyrolysis oil) was analyzed by chromatograph and gas chromatographymass spectrometry. The results show that high yield of pyrolysis oil is obtained at 550℃, The range of chemical composition of pyrolysis oil is numerous, and under different temperature, components of pyrolysis products changs greatly, and the high molecular weight substances are found in products resulting from no complete pyrolysis. Pyrolysis liquid products are mainly consisted of simple molecular structure phenolics, phenanthrenes, ketones, organicacids, etc. After the briefly economic analysis and comparison, it can be seen that cracking process based on the high value utilization of alkali lignin holds the higher value than traditional combustion technology.