工业碱木素裂解技术研究与经济分析

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

采用自行设计的高温裂解床研究了工业碱木素在不同温度下的热解产物分布规律;利用色谱仪和气质联用仪分析了热解的液相产物(热解油)的主要组成。研究结果表明:在550℃下热解,工业碱木素的热解油产物比较高,工业碱木素的热解油化学组分繁多,不同温度下的热解产物组成变化较大,同时产物中发现未被彻底裂解而保留的分子量较高的物质,热解液相产物主要组成是分子结构简单的酚类、菲类、酮类、有机酸等物质。经过对裂解技术与传统燃烧技术进行粗略经济分析可见,通过裂解工艺将碱木素进行高值化利用,其价值超过传统燃烧工艺。

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.