Development of sorbent manufacturing technology by agitation fluidized bedgranulator (AEBG)

Thousands of ppmv of hydrogen sulfide included in coal gas should be reduce d to less than a hundred ppmv in the case of IGCC to prevent a gas turbine from being corroded, and few ppmv to prevent the performance of electrodes from declining in the case of MCFC. In the present paper a laboratory scale AFBG (Agitation Fluidized Bed Granulator) is made and improved. The sorben t for the removal of hydrogen sulfide is produced using an agitation fluidi zed bed granulator (ZnO 1.5 mole+TiO2 1.0 mole+bentonite 5.0 wt%). The tech niques for fluidizing fine particles, classified in Geldart C group, in a f luidized bed are developed by installing an agitator blade in a fluidized b ed granulator. The fine particles are fluidized and granulated successfully by using the techniques. Statistical, spectral and chaos analyses with gra nulated sorbent (100-300 mu m) are performed to investigate the hydrodynami cs of granulates in a fluidized bed. The average absolute deviation, power spectral density functions, phase space trajectories, and Kolmogorov entrop y obtained from pressure fluctuation are plotted as a function of fluidizin g velocity. It is shown that the Kolmogorov entropy implying the rate of ge neration of information can be applied to the control of fluidization regim es.