首页> 中文期刊>中南大学学报 >微波加热和传统加热方式对高岭土热活化性能影响的比较

微波加热和传统加热方式对高岭土热活化性能影响的比较

     

摘要

本文研究了微波加热和传统加热对高岭土直接制备沸石前驱体活化性能的影响。讨论了XRD,TG-DSC,FT-IR,SEM,粒度分析,比表面积(BET),孔径分布(BJH)和N2吸附-脱附等温线以确定最佳热活化温度。结果表明,微波场中高岭土向偏高岭土的转化在500°C下保温30 min就能实现,这比常规煅烧温度低100°C,时间缩短90min,在微波与常规加热方法中高岭土相变过程相同。SEM分析表明,在微波场中,产物粒度更均匀,略有团聚。高岭土的N2吸附-解吸等温线,BET和BJH分析表明,在高岭土煅烧为偏高岭土的过程中,无论以何种方式煅烧,其孔隙性质几乎不变。以上结论表明,在微波场中活化高岭土优于常规活化。这主要是因为微波依靠物体吸收微波能量并将其转换成热能来加热,从而可以均匀地加热整个物质。

著录项

  • 来源
    《中南大学学报》|2020年第9期|P.2494-2506|共13页
  • 作者单位

    Faculty of Metallurgical and Energy Engineering Kunming University of Science and Technology Kunming 650093 ChinaState Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization Kunming University of Science and Technology Kunming 650093 China;

    Faculty of Metallurgical and Energy Engineering Kunming University of Science and Technology Kunming 650093 ChinaState Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization Kunming University of Science and Technology Kunming 650093 China;

    Faculty of Metallurgical and Energy Engineering Kunming University of Science and Technology Kunming 650093 ChinaState Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization Kunming University of Science and Technology Kunming 650093 China;

    Faculty of Metallurgical and Energy Engineering Kunming University of Science and Technology Kunming 650093 ChinaState Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization Kunming University of Science and Technology Kunming 650093 China;

    Faculty of Metallurgical and Energy Engineering Kunming University of Science and Technology Kunming 650093 ChinaState Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization Kunming University of Science and Technology Kunming 650093 China;

    Faculty of Metallurgical and Energy Engineering Kunming University of Science and Technology Kunming 650093 ChinaState Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization Kunming University of Science and Technology Kunming 650093 China;

    Faculty of Metallurgical and Energy Engineering Kunming University of Science and Technology Kunming 650093 ChinaState Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization Kunming University of Science and Technology Kunming 650093 China;

    Faculty of Metallurgical and Energy Engineering Kunming University of Science and Technology Kunming 650093 ChinaState Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization Kunming University of Science and Technology Kunming 650093 China;

  • 原文格式 PDF
  • 正文语种 chi
  • 中图分类 TQ1;
  • 关键词

    高岭土; 热活化; 偏高岭土; 微波;

  • 入库时间 2023-07-25 15:45:07

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