造纸黑液在微波水热碳化过程中的变化研究

Study on Change of Black Liquor during Microwave Hydrothermal Carbonization

木质素是造纸黑液的主要成分,直接排放会污染环境。作为可再生资源,其回收利用有很高价值。本文利用微波水热碳化对造纸黑液主要成分木质素进行处理,通过元素分析、FT-IR、SEM对碳化后的固体进行分析;其溶液进行紫外、荧光光谱和TEM测试。结果表明碳化后所得固体碳含量增加,粒径减小,并且表面变粗糙,具有作为高热值燃料或高吸附活性炭材料潜力。碳化后的溶液,产生了具有荧光的可溶性纳米颗粒,可作为可溶性的荧光碳材料。

As the main component of black liquor, lignin discharged directly will pollute the environment. Asrenewable resources, recycling has a high value. In this experiment, the main components of the black liquor were treatedby microwave hydrothermal carbonization, to prepare for fluorescent carbon materials. The solid composition was analyzedby elemental analysis, IR and SEM. The carbon solution was analyzed by UV, fluorescent spectra and TEM. The resultsshowed that the solid carbon content increased, the particle size decreased, and the surface became rough. It also had thepotential to act as a high calorific value fuel or a high adsorption activated carbon material. After carbonation, a solublenanoparticle with fluorescence effect was produced, it can be used as a fluorescent carbon material.