Abstract: The main ingredients and morphologies of residues from catalytic liquefaction of bagasse with acid functionalized ionic liquids in subcritical water were analyzed by using Fourier transform infrared spectroscopy(FT-IR)and scanning electron microscope(SEM).The relationship between surface morphology of liquefaction residue and acid strength of ionic liquid catalysts and process parameters，such as reaction temperature and time，were also investigated.The results showed that lignin and some refractory aromatic components were main ingredients of liquefaction residue.It also demonstrated that surface morphology of liquefaction residue was affected significantly by acid strength of catalyst and was much more temperature dependent.Both stronger acid and elevated liquefaction temperature resulted in higher degree of liquefaction and much coarser surface of residue.

Key words: bagasse, subcritical water, ionic liquid, catalytic liquefaction

摘要： 分别采用FT-IR、SEM对亚临界水中酸性功能化离子液体催化蔗渣液化残余物的主要成分及其表面形貌进行系统的分析，并对其与酸性离子液体催化剂的酸强度、反应温度、反应时间等工艺条件之间的关联规律进行了详细探讨。结果表明，蔗渣液化后的残渣主要是由木质素、难降解或部分降解的芳香类化合物组成；酸性越强、反应温度越高，蔗渣的液化程度越高，结构破坏得越彻底，液化残渣表面越粗糙。

关键词: 蔗渣, 亚临界水, 离子液体, 催化液化