NDLI: Ethylene Epoxidation in an AC Dielectric Barrier Discharge Jet System

Content Provider	Springer Nature Link
Author	Suttikul, Thitiporn Kodama, Satoshi Sekiguchi, Hidetoshi Chavadej, Sumaeth
Copyright Year	2013
Abstract	In this work, ethylene epoxidation was investigated in a dielectric barrier discharge jet (DBDJ) with a separate ethylene/oxygen feed under oxygen lean conditions. The ethylene (C$_{2}$H$_{4}$) stream was directly injected behind the plasma zone in order to reduce all undesired reactions, including C$_{2}$H$_{4}$ cracking and further reactions, while the oxygen (O$_{2}$) balanced with argon was fed through the plasma zone totally to maximize the formation of active oxygen species. The effects of various operating parameters, such as total feed flow rate, O$_{2}$/C$_{2}$H$_{4}$ feed molar ratio, applied voltage, input frequency, and C$_{2}$H$_{4}$ feed position on the ethylene epoxidation activity, were investigated to determine the optimum operating conditions for this new DBDJ system. The highest ethylene oxide (EO) selectivity (55.2 %) and yield (27.6 %), as well as the lowest power consumption (3.3 × 10$^{−21}$ and 6.0 × 10$^{−21}$ Ws/molecule C$_{2}$H$_{4}$ converted and EO produced, respectively) were obtained at a total feed flow rate of 1,625 cm$^{3}$/min (corresponding to a residence time of 0.022 s), an O$_{2}$/C$_{2}$H$_{4}$ feed molar ratio of 0.25:1, an applied voltage of 9 kV, an input frequency of 300 Hz, and a C$_{2}$H$_{4}$ feed position of 3 mm behind the plasma zone. The superior activity of the ethylene epoxidation in the DBDJ system resulted from a small reaction volume as well as a separate ethylene/oxygen feed.
Starting Page	187
Ending Page	205
Page Count	19
File Format	PDF
ISSN	02724324
Journal	Plasma Chemistry and Plasma Processing
Volume Number	34
Issue Number	1
e-ISSN	15728986
Language	English
Publisher	Springer US
Publisher Date	2013-09-20
Publisher Place	Boston
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Epoxidation Ethylene oxide Dielectric barrier discharge Atmospheric plasma jet Inorganic Chemistry Mechanics Characterization and Evaluation of Materials Mechanical Engineering
Content Type	Text
Resource Type	Article
Subject	Chemistry Surfaces, Coatings and Films Condensed Matter Physics Chemical Engineering

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