化工进展 ›› 2016, Vol. 35 ›› Issue (06): 1687-1697.DOI: 10.16085/j.issn.1000-6613.2016.06.009

• 化工过程与装备 • 上一篇    下一篇

微型流化床反应分析的方法基础与应用研究

曾玺1, 王芳2, 余剑1, 岳君容1, 姚梅琴1, 许光文1   

  1. 1. 中国科学院过程工程研究所多相复杂系统国家重点实验室, 北京, 100190;
    2. 中国矿业大学(北京)化学与环境工程学院, 北京, 100083
  • 收稿日期:2016-01-04 修回日期:2016-01-26 出版日期:2016-06-05 发布日期:2016-06-05
  • 通讯作者: 许光文,博士,研究员。E-mail:gwxu@ipe.ac.cn。
  • 作者简介:曾玺(1982-),男,博士,副研究员。
  • 基金资助:
    科技部重大仪器专项(2011YQ120039)、国家自然科学基金(21306209)及国家高技术研究发展计划(2015AA050505-02)项目。

Fundamentals and applications of micro fluidized bed reaction analysis

ZENG Xi1, WANG Fang2, YU Jian1, YUE Junrong1, YAO Meiqin1, XU Guangwen1   

  1. 1. State Key Laboratory of Multi-phase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China;
    2. School of Chemical and Environmental Engineering, China University of Mining & Technology (Beijing), Beijing 100083, China
  • Received:2016-01-04 Revised:2016-01-26 Online:2016-06-05 Published:2016-06-05

摘要: 准确测试气-固反应特性、求算动力学参数和推导反应机理是能源、化工、冶金等过程工程领域的重要研究课题。通过分析现有气-固反应分析测试方法与测试仪器优缺点,本文作者提出了利用微型流化床(MFB,micro fluidized bed)实现低扩散、快速升温条件下的反应微分化和等温分析的测试方法,系统研究了反应器内的流体力学特性,研制了微型流化床反应分析仪(MFBRA,micro fluidized bed reaction analyzer),验证和展示了其对热解、燃烧(氧化)、气化、还原、催化、吸收等典型气-固反应的应用,充分揭示了微型流化床反应分析仪强化传热传质、降低扩散抑制、实现实时在线微分分析的特性,尤其为快速复杂反应提供了有效的研究分析手段,并且拓展了水蒸气气氛、在线颗粒采样、串联反应解耦等系列气-固反应研究与表征功能,形成了与热重分析互补的气-固反应分析方法和分析仪。

关键词: 微型流化床, 热重分析仪, 气固反应, 反应分析, 动力学, 微型流化床反应分析仪

Abstract: Accurate measurement of gas-solids reaction characteristics,calculation of reaction kinetics and analysis of reaction mechanism are important to studies and developments of process engineering technologies in areas of energy,chemical engineering,and metallurgy. Analyzing various existing gas-solids reaction analysis approaches and instruments,we propose the use of micro fluidized bed (MFB) to realize isothermal differential reaction under conditions with rapid heating and low diffusion limitation. After systematic studies on hydrodynamics of micro fluidized bed,we have developed a micro fluidized bed reaction analyzer (MFBRA) and further verified its applications for many typical gas solids reactions,including pyrolysis,combustion,gasification,reduction,catalysis,and absorption. These applications well demonstrated MFBRA for its inherent advantages of intensified heat and mass transfer,minimized diffusion limitation and online real-time isothermal differential reaction. It particularly is applicable to analysis of rapid complex reactions and enables several extended functions for gas-solids reaction analysis like using steam atmosphere,on-line particle sampling and decoupling of reactions in series. MFBRA provides actually an effective TGA-complementary approach and instrument for gas-solids reaction analysis.

Key words: micro fluidized bed, thermogravimetric analyzer (TGA), gas-solid reaction, reaction analysis, kinetics, MFBRA

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