| 摘要 |
The invention relates to the realization of synthesis of organic compounds or abatement of volatile organic compounds (VOCs) in gas-solid fluidised bed photocatalytic reactor with improved illumination efficiency. The photoreactor consists of a two-dimensional fluidized bed catalytic reactor with two walls transparent to ultraviolet radiation, by an illumination system bases on a matrix of LEDs positioned near its external walls, and heated for Joule effect inside the catalytic bed to monitor the reaction temperature. Surprisingly, through the choice of a suitable catalyst and fluidized bed photoreactor operating conditions both total and partial oxidation reactions can be achieved with high activity and selectivity. Even more surprisingly, the value of the illuminated catalyst surface area per unit irradiated volume reaches values in the order of 106 m−1, significantly higher than those of microreactors, amounting to 250,000 m−1 and slurry reactors with values in 8500-170000 m−1. The photocatalytic system reported in the present invention is shown to have high illumination efficiency due to the use of UV-LEDs, which, ensuring a direction of light irradiation direction orthogonal to the emission point, minimize the dispersion of photons. |
