One-step conversion of ethane to ethylene oxide in AC parallel plate dielectric barrier discharge

This work studied the one-step conversion of ethane (C2H6) to ethylene oxide (EO) in an AC parallel plate dielectric barrier discharge (DBD) system with two frosted glass plates under ambient temperature and atmospheric pressure. EO is directly produced from C2H6 in a single step without the require...

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Bibliographic Details
Published in:Chemical Industry & Chemical Engineering Quarterly 2024-07, Vol.30 (3), p.231-241
Main Authors: Suttikul, Thitiporn, Manthung, Sirimas, Nuchdang, Sasikarn, Rattanaphra, Dussadee, Photsathian, Thongchai
Format: Article
Language:English
Subjects:
Ambient temperature
Atmospheric pressure
Carbon
Conversion
Dielectric barrier discharge
Electric potential
Electrons
epoxidation
Ethane
ethane oxidative dehydrogenation
Ethylene oxide
Gases
Glass plates
Helium
one-step reaction
Oxidation
Parallel plates
Plasma
Power consumption
Power supply
Sensors
Temperature
Voltage
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Summary:This work studied the one-step conversion of ethane (C2H6) to ethylene oxide (EO) in an AC parallel plate dielectric barrier discharge (DBD) system with two frosted glass plates under ambient temperature and atmospheric pressure. EO is directly produced from C2H6 in a single step without the requirement to separate and recycle ethylene. The effects of the applied voltage, input frequency, and O2/C2H6 feed molar ratio on the EO synthesis performance were examined. The results showed that a higher applied voltage and lower input frequency generated more highly energetic electrons, resulting in a higher current. More electrons collided with reactant gas molecules to initiate plasma reactions, increasing C2H6 and O2 conversions. The increased O2/C2H6 feed molar ratio enhanced C2H6 and O2 conversions. The optimum conditions were found to be an applied voltage of 7 kV, input frequency of 550 Hz, and O2/C2H6 feed molar ratio of 1:1, which demonstrated the highest EO selectivity (42.6%), EO yield (19.4%), and lowest power consumption per EO molecule produced (6.7 x 10-18 Ws/molecule).
ISSN:1451-9372
2217-7434
DOI:10.2298/CICEQ230228026S