Hydrogen production in microwave discharge in water solutions of ethanol at atmospheric pressure

Gas chromatography, optical emission spectroscope, high speed video camera were used to study the microwave discharge ignited near the end of the microwave antenna in aqueous solution of ethanol at different ethanol content and different incident microwave power. The pressure above the surface of li...

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Bibliographic Details
Published in:Plasma processes and polymers 2023-06, Vol.20 (6), p.n/a
Main Authors: Batukaev, Тimur S., Bilera, Igor V., Krashevskaya, Galina V., Lebedev, Yuri A., Epstein, Iren L.
Format: Article
Language:English
Subjects:
Aqueous solutions
Atmospheric pressure
Emission analysis
Ethanol
ethanol decomposition
Flow velocity
Gas chromatography
Gas mixtures
Hydrogen
Hydrogen production
Microwave antennas
Microwave discharge
microwave plasma in liquid
Reaction products
Water discharge
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Summary:Gas chromatography, optical emission spectroscope, high speed video camera were used to study the microwave discharge ignited near the end of the microwave antenna in aqueous solution of ethanol at different ethanol content and different incident microwave power. The pressure above the surface of liquid was close to atmospheric pressure. The main gas products were Н2, СО, С2Н2, СН4, С2Н4. H2 (≈60 vol%) and CO (≈30 vol%) are predominated. The composition of the reaction products in a microwave discharge is practically independent of incident power and ethanol content in the solution, but the total flow rate of gas products at the system output increases with an increase in the incident power and the ethanol content in solution. Best obtained characteristics of process of hydrogen production were: flow rate of hydrogen was of 3240 mL/min, concentration of hydrogen in gas mixture on the discharge outlet was of 59 vol%, maximum energy efficiency of hydrogen production was of 324 NL/kWh. Microwave plasma in liquid hydrocarbons is new area of plasma physics and plasma processing. In this paper we focus on study of hydrogen production in microwave discharge in aqueous solution of ethanol at atmospheric pressure. Gas chromatography, optical emission spectroscope, and high speed video camera were used to study the microwave discharge ignited near the end of the microwave antenna. The main gas discharge products were Н2, СО, С2Н2, СН4, С2Н4. Best obtained characteristics of process of hydrogen production were: flow rate of hydrogen was of 3240 mL/min, concentration of hydrogen in gas mixture on the discharge outlet was of 59 vol%, maximum energy efficiency of hydrogen production was of 324 NL/kWh.
ISSN:1612-8850
1612-8869
DOI:10.1002/ppap.202300015