论文部分内容阅读
采用Fe2O3-V2O5二元固体酸催化剂,对哈密风化煤通过水热法催化氧化工艺制备腐植酸。通过正交实验对催化氧化工艺条件进行了优化,并且采用X射线衍射(XRD)、扫描电子显微镜(SEM)、透射电子显微镜(TEM)、热重分析(TGA)研究了Fe2O3-V2O5二元固体酸催化剂的微观结构及形貌。结果表明:在酸煤比2∶l(m L/g),反应温度100℃,反应时间0.5 h,催化剂Fe2O3-V2O5用量为2%时腐植酸产率可达73.6%,比碱溶酸析工艺处理的风化煤中腐植酸产率提高了9.6%,表明水热法催化氧化工艺能明显提高腐植酸的产率。微观结构分析表明,Fe2O3-V2O5二元固体酸催化剂结晶性较好,同时具有良好的分散性和热稳定性。
The Fe 2 O 3 -V 2 O 5 binary solid acid catalyst was used to prepare humic acid by hydrothermal catalytic oxidation of Hami weathering coal. The conditions of the catalytic oxidation were optimized by orthogonal experiments. The effects of Fe2O3-V2O5 binary solid content (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM) and thermogravimetric analysis (TGA) Microstructure and Morphology of Acid Catalyst. The results show that the yield of humic acid can reach 73.6% when the ratio of acid to coal is 2l (m L / g), the reaction temperature is 100 ℃, the reaction time is 0.5 h and the amount of catalyst Fe2O3-V2O5 is 2% The yield of humic acid in the treated coal increased by 9.6%, indicating that the hydrothermal catalytic oxidation process can obviously increase the yield of humic acid. Microstructure analysis showed that Fe2O3-V2O5 binary solid acid catalyst has good crystallinity, good dispersibility and thermal stability.