Combustion characteristics of nano iron powders

Dan Dan He, Jing Jin*, Yao Lu, Can Wen Cai, You Hua Jiang, Yan Ning Fu

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

3 Scopus citations

Abstract

The surface microstructure, heat of combustion and thermogravimetric (TG) curves of different size iron powders were obtained through BET, combustion and thermogravimetry experiments of iron powders of the size 50, 100, 500 and 20×10 3 nm. The effects of the size on specific surface area and heat of combustion were analyzed. The combustion characteristic and kinetic parameters of different size iron powders at heating rate of 10, 20, 30 and 40 K/min were mainly studied. The results show that the specific surface area and heat of combustion are increased with the decrease of size, and the heat of combustion reaches the maximum value of 6 792.1 J/g when the size is 50 nm. As the size increases, the temperatures of ignition, maximum combustion rate and burnout are increased and burnout time is prolonged. As the heating rate increases, the ignition temperature, the temperature of maximum combustion rate and burnout temperature at the same size are increasing. Maximum combustion rate of nano iron powders is increased while that of micron iron powders is decreased. There is mutual compensation effect between activation energy and pre-exponential factor, and both are increased with the increase of size and heating rate.

Original languageEnglish
Pages (from-to)88-92
Number of pages5
JournalShanghai Ligong Daxue Xuebao/Journal of University of Shanghai for Science and Technology
Volume34
Issue number1
StatePublished - Feb 2012
Externally publishedYes

Keywords

  • Heat of combustion
  • Micron iron powders
  • Nano iron powders
  • Specific surface area
  • Thermogravimetric analysis

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