Study on Improvement of the Desulphuration Efficiency of Pulsed Corona Discharge by Water-based Radicals Produced by a DC Corona

摘要

Positive DC corona discharge are formed with needle-plate electrode configurations, in which the water vapor is ejected though the needle points. The purpose is to increase the numbers of the water-based radicals, ionize the water molecule and improve the desulfuration efficiency of pulsed corona reactor. In this paper, we measured the water ions by four stage molecular beam mass spectrometer and diagnose the water-based radicals by emission spectrograph. A conclusion on formation of ions and radicals with DC corona discharges can be drawn. When the needle-plate electrode system was assembled in front of the pulsed corona plasma rector, the water based radicals ejecting with DC corona discharges can increase the desulfuration efficiency of pulsed corona plasma 10%, and general desulfuration efficiency can get to 90%.