硫酸盐法制浆黑液中主要有机组分的热解特性研究  

Pyrolysis characteristics of main organic components of kraft pulping black liquor

作　　者：戴涛[1] 武书彬[1,2] 郭大亮[1] 

机构地区：[1]华南理工大学制浆造纸工程国家重点实验室,广东广州510640 [2]中国科学院广州能源研究所可再生能源与天然气水合物重点实验室,广东广州510640

出　　处：《燃料化学学报》2013年第2期169-176,共8页Journal of Fuel Chemistry and Technology

基　　金：国基自然科学基金(21176095);科技部"科技支撑计划"(2012AA101806);中国科学院可再生能源与天然气水合物重点实验室开发基金(y207k1)

摘　　要：采用管式炉对硫酸盐法竹子、阔叶木混合制浆黑液固形物(BLS)及其三种主要组分碱木素(AL)、多糖(PLS)和木素-碳水化合物复合体(LCC),在400～800℃进行热解,全面分析了各相热解产物组成与分布规律。结果表明,BLS及其三种主要组分的热解产物组成与分布规律存在明显差异。AL、PLS和LCC对BLS热解产生H2和CO的产率影响不大,PLS热解生成CO2的能力明显高于BLS、AL和LCC。BLS热解液相产物中的酚类和醚类主要是来自AL和LCC;酮类和酸类是由AL、PLS和LCC共同贡献的。BLS、AL、PLS和LCC热解半焦表面形貌存在明显差异。在BLS热解过程中,AL、PLS和LCC会相互影响、相互制约,共同决定着BLS的热解特性。The pyrolysis characteristics of black liquor solids （BLS） and three major organic components including alkali lignin （AL）, polysaccharide （PLS） and lignin-carbohydrate complexes （LCC））were studied in a tubular fumace at 400 - 800 ℃ with 100℃（2 interval. The component distribution characteristics of the tar and gas were analyzed by gas chromatography with mass spectrometry （GC/MS） and gas chromatography （GC）. The surface morphology and chemical structure groups of char were characterized by scanning electron microscopy （SEM） and Fourier Transforms Infrared Spectroscopy （FT-IR）. The results show that the composition and distribution rules of pyrolysis products from BLS and its organic components pyrolysis are obviously different. AL, PLS and LCC have little effect on the yields of H2 and CO from BLS pyrolysis. The yield of CO2 from PLS pyrolysis is significantly higher than that from BLS, AL and LCC. Phenols and ethers in liquid products of BLS pyrolysis are mainly from the AL and LCC. Ketones and acids were resulted from AL, PLS, and LCC. The surface morphology of the BLS, AL, PLS, and LCC pyrolysis char is significant different. AL, PLS, and LCC affect each other in BLS pyrolysis process, and determine its pyrolysis characteristics together.

关 键 词：黑液 碱木质素 多糖 木素-碳水化合物复合体 热解 

分 类 号：TK6[动力工程及工程热物理—生物能]