自制新型DBD反应器分解碱木质素的实验研究

Experimental study on the decomposition of alkaline lignin by a novel homemade DBD reactor

本文利用自制新型DBD反应装置对碱木质素进行分解研究,探讨了反应时间、反应物用量和放电电压等对木质素分解效果的影响。利用GC-MS、FT-IR、UV-Vis等技术对分解产物进行分析表征。结果表明,在放电频率8.11 kHz的前提下,反应时间为25 min、碱木质素用量2.0 g/L和输出电压11.5 kV的条件下,木质素的分解率为23.1%,分解产物主要为芳香类化合物,其中2,2'-亚甲基双(6-叔丁基-4-甲基苯酚)的选择性最高可达86.78%。

In this paper,a novel homemade DBD reaction device was used to decompose alkaline lignin in aqueous solution.The effects of reaction time,reagent dosage and discharge voltage on investigating the impact of the decomposition effect.The decomposi-tion products were analyzed by GC-MS,FT-IR and UV-Vis techniques.The result showed that the decomposition rate of alkaline lig-nin with a dosage of 2.0 g/L was 23.1%at the discharge frequency of 8.11 kHz,reaction time of 25 minutes and output voltage of 11.5 kV.The mainly decomposition products were aromatic compounds,among of which the selectivity of 2,2'-methylene bis(6-tert-butyl-4-methylphenol)reaching 86.78%.