A multifunctional tube reactor for catalytic oxidization of dioxins and its pilot-scale application

Dioxins are hazardous pollutants and catalytic oxidization is an effective technology for the treatment, and more works needs to set up the monolithic reactor to promote the industrial application. In this work, a catalyst formula was optimized and used to prepared tube reactor (phi 60 mm*1500 mm) for the pilot investigation. As a result, the powdered catalyst removed 90% of chlorobenzene (430 ppm) at 200 degrees C. 6-tube reactor removed 80% of chlorobenzene (330 ppm, 24 m3 center dot h-1) at 200-210 degrees C in a lab-scale pilot experiment. 96-tube reactor removed 90% of real dioxins (0.26 ng TEG center dot Nm- 3, 1000 m3 center dot h-1) at 230 degrees C in an incineration plant. Simultaneously, the tube reactor removed 99% of NOx (78.9 mg center dot Nm- 3) and particle matters with an average size of 6 mu m. Acidic gases were removed by dry deacidification. Considering this, dioxins, NOx, acidic gases, and particle matters were removed at the same time. This result is in favor of simplifying and integrating flue-gas treatment system to reach treating all pollutants by one equipment concept.

Automated summary

This study successfully prepared a tube reactor with optimized catalyst formula, which showed good performance in removing dioxins and other pollutants in the experiments.