Monitoring of nonthermal plasma degradation of phthalates by ion mobility spectrometry

Abstract

Ion mobility spectrometry was used to monitor the degradation of phthalate vapors by corona discharge. Three different phthalates (dimethyl [DMP], diethyl [DEP], and dipropyl [DPP]) were examined in a corona discharge reactor (wire‐to‐cylinder geometry) at direct current positive polarity in ambient air. The relative removal efficiencies up to 96% and energetical degradation efficiencies of 229.27, 216.12, and 198.84 kJ mg−1 were achieved for DMP, DEP, and DPP, respectively. Byproducts such as methanol, ethanol, and 1‐ and 2‐propanol at extremely low densities were also detected. The identified degradation processes involved two steps: (i) An electron‐impact dissociation of phthalates into alkoxyl radicals and (ii) reactions of alkoxy radicals with water molecules to form alcohols.

Microscopic dynamics and mechanism of Trichel pulse discharge

“…It is widely applied in ionic wind, surface treatment, gas detection, biomedicine, and charged aerosols. [1][2][3] Many unstable phenomena exist in corona discharge, one of which is the Trichel pulse. It is an interesting phenomenon, and pulsed modes of discharge current and voltage are obtained in the discharge despite a direct current negative voltage supply on the electrode.…”

Global numerical simulation of chemical reactions in phosphate-buffered saline (PBS) exposed to atmospheric-pressure plasmas

“…treatment, [28][29][30][31][32][33][34][35][36][37] nano-particle synthesis, [38][39][40][41][42][43][44] sterilization, wound healing and other medical applications [22,[45][46][47][48][49][50][51][52][53][54][55][56][57][58][59][60], and plant treatment and other agricultural applications [61][62][63][64][65][66][67][68][69]. For many such applications, plasma-liquid interactions play important roles in generating relevant chemically reactive species [70][71][72][73][74][75]…”