Quantification and prediction of water uptake by soot deposited on ventilation filters during fire events

JOURNAL OF HAZARDOUS MATERIALS

卷:403

Article

Lintis, Laura^1,2  Ouf, Francois-Xavier¹  Parent, Philippe³  Ferry, Daniel³  Laffon, Carine³  Vallieres, Cecile² 

[1] SCA, PSN RES, Inst Radioprotect & Surete Nucl IRSN, F-91192 Gif Sur Yvette, France

[2] Univ Lorraine, CNRS, UMR 7274, Lab React & Genie Proc LRGP, F-54000 Nancy, France

[3] Aix Marseille Univ, CNRS, CINaM, Marseille, France

关键词: Fire soot;    Physical and chemical characterization;    Water adsorption;    Dubinin-Serpinsky model;   

DOI  :  10.1016/j.jhazmat.2020.123916

来源: Elsevier

【 摘 要 】

Soot samples from different fuels were produced in small and pilot combustion test benches at various O-2 concentrations, and were then characterized in terms of primary particle diameter, specific surface area and oxygen content/speciation. Water sorption measurements were then carried out for soot compacted into pellet form and in powder form, using both a gravimetric microbalance and a manometric analyser. Water adsorption isotherms are all found to be Type V, and reveal the central role of the specific surface area and the oxygen content of soot. A single parametrization of the second Dubinin-Serpinsky model gives a proper fit for all isotherms. To the best of our knowledge, this is the first study to provide physico-chemical parameters and water sorption results for fire soot. This enables a better description of the soot cake formed on filters during a fire, in particular in industrial confined facilities as simulated in this study. Humidity can be then explicitly considered in the same way as other parameters influencing the aeraulic resistance of soot cakes. These results can be used to improve predictions of the consequences of fires on the containment of toxic materials within industrial facilities.

【 授权许可】

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