Abstract: Microwave-assisted Xilinhaote lignite oxidation with hydrogen peroxide in aqueous alkali were studied by using orthogonal test. Taking the yield of succinic acid as index, the reaction time, reaction temperature, the concentration of H2O2 and the alkali/coal mass ratio were investigated. The highest yield of succinic acid under the optimum reaction conditions was 20.4% (daf). The optimum conditions include reaction temperature 180°C, reaction time 1 hour, alkali/coal mass ratio 1.5:1 and the concentration of H₂O₂ 0.026 mol/L.

Key words: lignite, microwave-assisted, alkali-oxidation, orthogonal test

摘要： 微波辅助条件下, 采用正交试验方法对内蒙锡林浩特褐煤进行了碱氧化研究。 以有机酸中丁二酸产率为指标, 考察了反应温度、时间、氧化剂用量及碱浓度对丁二酸产率的影响, 得到锡林浩特褐煤碱氧化反应的最佳条件为反应温度180°C, 碱煤质量比1.5:1, 恒温时间1 h, H₂O₂浓度0.026 mol/L。最佳条件下丁二酸产率可达20.4%(对daf煤)。

关键词: 褐煤, 微波辅助, 碱氧化, 正交试验