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以陶瓷纤维作为载体,Co-salen为催化剂,制备高催化活性的催化纸。压汞法测得催化纸的平均孔径为6.21μm,等离子原子发射光谱测得Co-salen催化纸中Co的含量为0.76 wt%。将催化纸应用于硫酸盐木素催化降解中,采用1H-NMR、13C-NMR核磁共振分析比较经Co-salen催化纸和一般固载型催化剂Co-salen/Na Y处理前后硫酸盐木素的结构变化。结果表明:催化处理后,硫酸盐木素苯环开环降解,甲氧基数量减少,愈创木基、紫丁香基结构单元减少,β-O-4、β-β、5-CH2-5’连接发生断裂,且Co-salen催化纸催化降解的木素结构变化更明显,为进一步改进硫酸盐木素的降解提供了有利条件。
Using ceramic fiber as carrier and Co-salen as catalyst, a catalytic paper with high catalytic activity was prepared. The average pore diameter of catalytic paper measured by mercury porosimetry was 6.21μm, and the content of Co in Co-salen catalytic paper measured by plasma atomic emission spectrometry was 0.76 wt%. The catalytic paper was applied to the catalytic degradation of kraft lignin. The contents of kraft lignin before and after Co-salen-catalyzed paper and Co-salen / NaY catalyst were compared by 1H-NMR and 13C-NMR. Structural changes. The results showed that, after catalytic treatment, the open-loop degradation of the benzene ring of kraft lignin decreased the number of methoxy groups, the more guaiacyl and lilacyl-based structural units decreased, and the content of β-O-4, β-β, ’, And the change of lignin structure catalyzed by Co-salen catalysis was more obvious, which provided favorable conditions for further improving the degradation of kraft lignin.