Suppression of methane/air explosion by kaolinite-based multi-component inhibitor

A novel multi-component powder inhibitor was prepared by mixing conventional suppressants (ammonium polyphosphate and aluminium hydroxide) with porous kaolinite. The inhibition performance of this developed inhibitor was investigated using a 20-L spherical experimental explosion system. The explosio...

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Bibliographic Details
Published in:Powder technology 2019-02, Vol.343, p.279-286
Main Authors: Sun, Yaru, Yuan, Bihe, Chen, Xianfeng, Li, Kaiyuan, Wang, Liancong, Yun, Yalong, Fan, Ao
Format: Article
Language:English
Subjects:
Aluminum
Ammonium
Calorimetry
Differential scanning calorimetry
Explosions
Gas explosion
Inhibition
Inhibitors
Kaolinite
Mass spectrometry
Mass spectroscopy
Mechanism
Multi-component inhibitor
Organic chemistry
Powder
Pressure
Stability analysis
Synergistic effect
Thermal stability
Thermogravimetric analysis
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Summary:A novel multi-component powder inhibitor was prepared by mixing conventional suppressants (ammonium polyphosphate and aluminium hydroxide) with porous kaolinite. The inhibition performance of this developed inhibitor was investigated using a 20-L spherical experimental explosion system. The explosion parameters, such as the maximum explosion pressure, maximum pressure rising rate, and time to peak explosion pressure, were obtained to evaluate the suppression effects. The results show that the multi-component inhibitor exhibits higher suppression performance than the single components. The thermal stability, decomposition behavior, and gaseous products were investigated using thermogravimetric analysis, differential scanning calorimetry, and thermogravimetric-mass spectrometry. The inhibition mechanisms are illustrated using physical and chemical explanations. The current work introduces a new gas explosion inhibitor with high performance resulting from the synergistic effect between its ingredients. Inhibition mechanisms of the multi-component powder are investigated by explosion experiments and thermal decomposition analysis. [Display omitted] •Inhibitor is prepared by mixing porous mineral with conventional suppressants.•Excellent explosion inhibition efficiency is achieved for this powder inhibitor.•Inhibition mechanisms of the multi-component inhibitor are investigated.
ISSN:0032-5910
1873-328X
DOI:10.1016/j.powtec.2018.11.026