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VOC adsorption in circulating gas fluidized bed
Alternative TitleAdsorpt.-J. Int. Adsorpt. Soc.
Song, W. L.; Tondeur, D.; Luo, L. G.; Li, J. H.
Conference Name8th International Conference on Fundamentals of Adsorption
Source PublicationAdsorption-Journal of the International Adsorption Society
Conference DateMAY 23-28, 2004
Conference PlaceSedona, AZ

The purpose of the work is to show that CFB adsorption process is technically feasible to obtain an interesting pollution abatement, and to set the bases of a process design. Experimental results are presented, obtained with toluene being adsorbed from an air stream on polymeric adsorbent in a batch operation circulating fluidized bed. This results in a breakthrough behavior at the top of the riser, analogous to a fixed-bed experiment. The existence of breakthrough curves that are astonishingly sharp in spite of the strong mixing of the solid phase implies that efficient toluene abatement can be achieved. The breakthrough curves can be used to predict the behavior of the process in a continuous mode where the adsorbent would be partially regenerated, and which would lead to an less than total toluene abatement. The shape of the breakthrough curves clearly depends on the operating parameters, in particular the gas flow rate and the solids circulation rate. The EMMS model was adapted and implemented to describe the flow pattern of gas and solid. The model predicts the relative volume fractions of these phases, the volume fractions inside each, the superficial velocities of gas and solid in each phase, and the average cluster size. From this description, an estimation of the apparent gas/solid mass transfer coefficients may be done, and their dependence on operating conditions investigated.

KeywordAdsorption Circulating Fluidized Bed Volatile Organic Compounds
Document Type会议论文
Recommended Citation
GB/T 7714
Song, W. L.,Tondeur, D.,Luo, L. G.,et al. VOC adsorption in circulating gas fluidized bed[C],2005:853-858.
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