Hydrogen production from ethanol using dielectric barrier discharge

Ulejczyk, Bogdan; Nogal, Łukasz; Młotek, Michał; Krawczyk, Krzysztof

doi:10.1016/j.energy.2019.02.180

Cited by 31 publications

(25 citation statements)

References 22 publications

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“…The composition of the liquid was measured with the Thermo Fisher Scientific (Waltham, MA, USA)Trace 1300 chromatograph equipped with the single quadrupole mass spectrometer. The same research methodology was used in our previous studies [7,61]. The substrates (water and methanol) flow rates were 1 mol/h for each reagent and were controlled with liquid mass flow controllers (Bronkhorst/EIEWIN, Gliwice, Poland) calibrated to water and methanol.…”

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

“…The composition of the liquid was measured with the Thermo Fisher Scientific (Waltham, MA, USA)Trace 1300 chromatograph equipped with the single quadrupole mass spectrometer. The same research methodology was used in our previous studies[7,61].The reactor was powered by alternating current with a frequency of 15.3 kHz using the power supply constructed at the Faculty of Electrical Engineering of the Warsaw University of Technology. The discharge powers were 15, 30 and 46 W.The discharge was turned on when starting the feeding of the reactor with the substrates.…”

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confidence: 99%

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Plasma-Catalytic Process of Hydrogen Production from Mixture of Methanol and Water

et al. 2021

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In the present work the process of hydrogen production was conducted in the plasma-catalytic reactor, the substrates were first treated with plasma and then introduced into the catalyst bed. Plasma was produced by a spark discharge. The discharge power ranged from 15 to 46 W. The catalyst was metallic nickel supported on Al2O3. The catalyst was active from a temperature of 400 °C. The substrate flow rate was 1 mol/h of water and 1 mol/h of methanol. The process generated H2, CO, CO2 and CH4. The gas which formed the greatest amount was H2. Its concentration in the gas was ~60%. The conversion of methanol and the production of hydrogen in the plasma-catalytic reactor were higher than in the plasma and catalytic reactors. The synergy effect of the interaction of two environments, i.e., plasma and the catalyst, was observed. The highest hydrogen production was 1.38 mol/h and the highest methanol conversion was 64%. The increased in the discharge power resulted in increasing methanol conversion and hydrogen production.

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

“…The composition of the liquid was measured with the Thermo Fisher Scientific (Waltham, MA, USA)Trace 1300 chromatograph equipped with the single quadrupole mass spectrometer. The same research methodology was used in our previous studies[7,61].The reactor was powered by alternating current with a frequency of 15.3 kHz using the power supply constructed at the Faculty of Electrical Engineering of the Warsaw University of Technology. The discharge powers were 15, 30 and 46 W.The discharge was turned on when starting the feeding of the reactor with the substrates.…”

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confidence: 99%

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Plasma-Catalytic Process of Hydrogen Production from Mixture of Methanol and Water

et al. 2021

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“…The molar feed flow rate ranged from 0.4 to 1.2 mol/h. The methods and apparatus used in the catalyst activity tests were described in detail in our previous works [2,24,34,35].…”

Section: Catalyst Activity Testsmentioning

confidence: 99%

A Promising Cobalt Catalyst for Hydrogen Production

et al. 2022

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In this work, a metal cobalt catalyst was synthesized, and its activity in the hydrogen production process was tested. The substrates were water and ethanol. Activity tests were conducted at a temperature range of 350–600 °C, water to ethanol molar ratio of 3 to 5, and a feed flow of 0.4 to 1.2 mol/h. The catalyst had a specific surface area of 1.75 m2/g. The catalyst was most active at temperatures in the range of 500–600 °C. Under the most favorable conditions, the ethanol conversion was 97%, the hydrogen production efficiency was 4.9 mol (H2)/mol(ethanol), and coke production was very low (16 mg/h). Apart from hydrogen and coke, CO2, CH4, CO, and traces of C2H2 and C2H4 were formed.

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“…In recent years, plasma has been used for ethanol reforming − to produce hydrogen. Xin et al studied hydrogen production from ethanol solution by pulsed discharge coupled with TiO 2 in this work.…”

Section: Introductionmentioning

confidence: 99%

Hydrogen Production from Ethanol Reforming by a Microwave Discharge Using Air as a Working Gas

et al. 2021

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Hydrogen production from ethanol reforming using microwave plasmas has great potential. In this study, a microwave plasma torch is used as a plasma source. Air is used as a discharge gas to generate the plasma. Ethanol and air are mixed and injected directly into the plasma reaction zone in a vortex flow. The effects of the oxygen-to-ethanol molar ratio (O 2 /Et), ethanol flow rate, and absorbed microwave power on the reforming results are investigated. When the O 2 /Et exceeds 0.9, ethanol is completely converted. The hydrogen selectivity is the largest when the O 2 /Et is 1.1, which is about 66.5%. The maximum hydrogen production rate is 2.19 mol(H 2 )/mol(C 2 H 5 OH). The best carrier gas residence time is 0.64–0.81 s. An appropriate increase in the ethanol flow rate can improve the ethanol conversion rate and energy efficiency while reducing the hydrogen selectivity and hydrogen yield, so the ethanol flow rate should not exceed 42.1 mL/min. The cost of hydrogen production is minimum [$3.66/kg(H 2 )] when the ethanol flow rate is 42.1 mL/min. The positive effect of the absorbed microwave power on the reforming reaction is significant, but too much microwave power also reduces energy efficiency. The optimum experimental conditions are an O 2 /Et of 0.9, an ethanol flow rate of 42.1 mL/min, and an absorbed microwave power of 700 W. The maximum energy yield is 861.91 NL(H 2 )/kWh at an absorbed microwave power of 700 W. The main reforming products are H 2 , CO, CO 2 , CH 4 , C 2 H 2 , C 2 H 4 , C 2 H 6 , C 3 H 6 , C 3 H 8 , C 4 H 10 n, and C 4 H 10 i. The content of C2 or higher hydrocarbons is considerably low. Almost no deposited carbon is generated in the experiment, which means that the design of the reforming system is effective in suppressing carbon deposition.

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Hydrogen production from ethanol using dielectric barrier discharge

Cited by 31 publications

References 22 publications

Plasma-Catalytic Process of Hydrogen Production from Mixture of Methanol and Water

Plasma-Catalytic Process of Hydrogen Production from Mixture of Methanol and Water

A Promising Cobalt Catalyst for Hydrogen Production

Hydrogen Production from Ethanol Reforming by a Microwave Discharge Using Air as a Working Gas

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