有序介孔HZSM-5分子筛的合成及其在甲醇制芳烃中的催化性能

Synthesis of sequential mesoporous HZSM-5 molecular sieve and its catalytic performance in methanol to aromatics

    摘要
  • 摘要: 本研究采用模板法以及水热法，成功制备了不同粒径(20、30和40 nm)、硅铝比约为50的有序介孔HZSM-5分子筛。采用XRD、SEM、TEM、N2等温吸附-脱附和Py-FTIR等手段对合成样品的结构、形貌和表面酸性等性质进行了表征，并在固定床反应器上测试了其在甲醇制芳烃过程中的催化活性。实验结果表明，不同粒径的有序介孔HZSM-5分子筛对甲醇制芳烃反应的催化性能不同，其中，20 nm的有序介孔HZSM-5分子筛展示了优异的催化性能，轻质芳烃的选择性高达60.0%，催化剂在连续运行51 h之后没有明显的失活现象。

     

    Abstract: In this paper, ordered mesoporous HZSM-5 zeolite with different particle sizes (20, 30 and 40 nm) and the Si/Al ratio of 50 was successfully prepared by the hydrothermal method. The structure, morphology and surface acidity of the synthesized samples were characterized by XRD, SEM, TEM, N2 isothermal adsorption/desorption and Py-FTIR, and their catalytic activities were tested in the methanol to aromatics process on a fixed-bed reactor. The experimental results showed that the catalytic performance of ordered mesoporous HZSM-5 zeolite with different particle sizes was different for the methanol to aromatics reaction. The ordered mesoporous HZSM-5 zeolite of 20 nm exhibited excellent catalytic performance with the selectivity of light aromatics up to 60.0% and no significant deactivation of the catalyst after 51 h of continuous operation.

     

    • HTML全文
    • 参考文献(42)
    • 相关文章
    • 施引文献
  • 资源附件(0)

/

返回文章
返回