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Monitoring of nonthermal plasma degradation of phthalates by ion mobility spectrometry
Author(s) -
Moravský Ladislav,
Michalczuk Bartosz,
Hrdá Jana,
Hamaguchi Satoshi,
Matejčík Štefan
Publication year - 2021
Publication title -
plasma processes and polymers
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.644
H-Index - 74
eISSN - 1612-8869
pISSN - 1612-8850
DOI - 10.1002/ppap.202100032
Subject(s) - diethyl phthalate , chemistry , dimethyl phthalate , radical , ion mobility spectrometry , corona discharge , dissociation (chemistry) , mass spectrometry , methanol , alkoxy group , dibutyl phthalate , phthalate , analytical chemistry (journal) , degradation (telecommunications) , ion , photochemistry , chromatography , organic chemistry , alkyl , telecommunications , electrode , computer science
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.