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Volume 12, No. 6, December 2012, Pages 1355-1361 PDF(258 KB)  
doi: 10.4209/aaqr.2012.03.0060   

Removal of Hydrogen Sulfide by Iron-Rich Soil: Application of the Deactivation Kinetic Model for Fitting Breakthrough Curve

Tzu-Hsing Ko1, Hsin-Ta Hsueh2

1 Department of Hospitality and Tourism Management, Kao Fong College of Digital Contents, 38, Chang-Ji Township, Pingtung County 908, Taiwan
2 Sustainable Environment Research Center and University Center for Bioscience and Biotechnology, National Cheng Kung University, Tainan 701, Taiwan




In this study a deactivation kinetic model was used to predict the breakthrough curve in a noncatalytic gas-solid reaction. The iron-rich soil was tested to react with H2S under a reducing atmosphere at high temperature. The results indicated that the deactivation kinetic model can be well fitted to the breakthrough curve in the experimental range. The breakthrough curves were accurately predicted by the model, and provide useful information for the time to reload the solid materials in the reaction. The activation energy of the reaction of iron-rich soil and H2S was experimentally calculated to be about 34 kJ/mol and 131 kJ/mol, respectively for the deactivation kinetic model I (m = 0, n = 1) and model II (m = 1, n = 1). Both of the deactivation kinetic models can fit the experimental results. The order of H2S in the deactivation model probably ranged from zero to one.



Keywords: Deactivation kinetic model; Iron-rich soil; H2S; Breakthrough curve; Activation energy.



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