Modelling of heavy meal vaporisation from a mineral matrix

被引:36
作者
Abanades, S [1 ]
Flamant, G [1 ]
Gauthier, D [1 ]
机构
[1] IMP, CNRS, Inst Sci & Genie Mat & Procedes, F-66125 Font Romeu, France
关键词
incineration; fluidised bed; mineral matrix; heavy metals; vaporisation; adsorption; speciation;
D O I
10.1016/S0304-3894(01)00298-9
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
This study deals with the fundamental aspects of the volatilisation of heavy metals (HM) during municipal solid waste (MS W) incineration. The thermal treatment of a model waste was theoretically and experimentally studied in a fluid-bed. A mathematical model was developed to predict the fate of metallic species according to the main phenomena controlling the process: heat and mass transfer (transport phenomena), chemical reactions involving HM, and mechanism of vapour metal species sorption inside the porous matrix. The model assumes local thermodynamic equilibrium between the vapour and the metal compound on the substrate in the pores of a particle. This approach permits to predict the extent of HM vaporisation from a mineral porous matrix when its physical properties are known. Experimental data concerning CdCl2 release from an alumina matrix in a 850 degreesC fluidised bed are in good agreement with theoretical results. (C) 2001 Elsevier Science B.V All rights reserved.
引用
收藏
页码:75 / 94
页数:20
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