This PhD-work is meant to determine the contact efficiency experimentally for fluidization of fine particles over a wide range of superficial gas velocities (dp<200 mm and 0.1<ug<4.5 m/s) in bench scale units. A special measuring method has been developed based on the application of rapid oxidation of carbon monoxide over a Pt-catalyst, as a model reaction. For this reaction, it can be recognized immediately whether the conversion is determined by the intrinsic reaction kinetics or by any mass transfer processes. A change of the conversion rate controlling mechanism corresponds to a large change in the reaction order of CO, viz. from minus one to plus one. As a second tool of this study, dilution of the active catalyst with similar but inert particles has been used to investigate the influence of the local reaction rate on the contact efficiency.
|Award date||19 Feb 1998|
|Place of Publication||Enschede|
|Publication status||Published - 19 Feb 1998|