Abstract
Publisher Summary This chapter discusses the effects of secondary particle or aggregate size on the catalyst reactivity for TCE degradation. A good photoreactor design must maintain both high catalyst effectiveness and high photon utilization. However, the geometry of the photoreactor is usually constrained by the light source. Titanium dioxide (TiO2) is the most commonly used photocatalyst for PCO process because of its excellent chemical stability, good catalytic activity, and easy availability. TiO2 catalysts of controlled primary and secondary particle sizes were successfully prepared using a modified sol-gel method. These catalysts have identical particle morphology. Although the surface area of the TiO2 catalyst is unaffected by the secondary particle size, the activity of the catalyst for TCE photo-oxidation exhibited strong dependency on the aggregate size. Comparison of the two reactor configurations, fiat-plate, and differential indicates that the differential reactor provides better mineralization of the TCE pollutant.
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