木质素基介孔碳催化剂构建及其催化木聚糖制备糠醛

Construction of lignin-based mesoporous carbon solid acid and its application in furfural production from xylan

摘要:

以有机溶剂提取的木质素为碳前体,乙二醛为交联剂,采用溶剂蒸发诱导自组装(EISA)法,磺化合成木质素衍生介孔碳(MC-SO3H)固体酸。制成的MC-SO3H具有120.74 m2/g的介孔表面积和4.15 nm的平均孔径,并且在木聚糖催化转化为糠醛的反应中表现出良好的催化活性。以γ-戊内脂(GVL)为溶剂,反应条件为180 ℃,木聚糖添加量为1 g,MC-SO3H加载量为1 g,反应时间为10 min,可获得79.5%的糠醛产率。此外,该催化剂在催化木糖降解制备糠醛的反应中表现出良好的使用稳定性和可重复使用性。本研究为木质纤维素中木质素资源的合理化利用提供了一种有前景的新策略。

Abstract:

Sulfonated lignin-derived mesoporous carbon (MC-SO3H) solid acid was synthesized by solvent evaporation-induced self-assembly (EISA) method using organic solvent extracted lignin as carbon precursor and glyoxal as crosslinking agent. The MC-SO3H has a mesoporous surface area of 120.74 m2/g and an average pore size of 4.15 nm, and exhibited excellent activity in catalytic conversion of xylan to furfural. An optimized furfural yield of 79.5% was achieved from 1 g xylan catalyzed by 1 g MC-SO3H in γ-valerolactone (GVL) solvent and reacted at 180 ℃ for 10 min. Moreover, MC-SO3H showed satisfactory reaction stability and reusability in catalytic conversion of xylose to produce furfural. This study provides a promising new strategy for the rationally utilization of lignin sources of lignocelluloses.