玉米秸秆粉料在放电等离子体中的裂解反应

Splitting reaction of corn stalk powder in discharged plasma

为了实现在无氧化、无燃烧的情况下玉米秸秆粉料一步分解为糖产物,开展了高气压放电等离子体处理秸秆粉料的实验研究。结果发现,玉米秸秆粉料在不经复杂的预处理和添加助剂情况下,可一步裂解为糖产物,得到了单糖、二糖等产物。通过对秸秆及秸秆主要成分纤维素、半纤维素和木质素反应产物的分析与表征,得到了较好的裂解条件,在环境温度70℃、压力90kPa、N2媒质气体流量0.35L·min-1和常压饱和水蒸气流量0.1L·min-1、放电电压3kV、放电间隙0.60mm的条件下,放电60min后玉米秸秆粉料转化率为69.36%,糖选择性为39.68%,糖产率为40.16%。这些结果初步显示了玉米秸秆在无酸碱、无高温高压、无需复杂预处理的条件下分解成糖的可能性。

Corn stalk powder was processed in high pressure non-equilibrium plasma aiming to produce saccharide compounds by one step without oxidation and combustion. The results show that corn stalk powder can be splitted into saccharide compounds, such as monosaccharide and disaccharide etc., in discharged plasma without any pretreatment and any additives. The optimized splitting conditions were found to be. 70℃ of circumstance temperature, 90 kPa of pressure, 0. 35 L ·min^-1 of media gas N2 flow, 0.1 L ·min^-1 of saturated vapour flow, 3 kV of discharge voltage, 0.60 mm of discharge gap, and 60 min of discharge duration. Under these conditions, the conversion of corn stalk powder was 69.36% with the selectivity of 39.68%, and the yield of saccharide compounds was 40. 16%. These results clearly illustrated that the production of saccharide compounds by the splitting of corn stalk powder is possible without any acid or alkali or any other complicated pretreatment, and the process can proceed even with no needs of high temperature and high pressure.