Enhanced production of hydrogen from methanol using spark discharge generated in a small portable reactor

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

doi:10.1016/j.egyr.2021.11.290

Cited by 11 publications

(7 citation statements)

References 61 publications

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“…The methodology and apparatus used in the research were similar to those used in our earlier studies described in our previous papers. ,− A spark reactor powered by an alternating current power supply was used in the research. The apparatus diagram and the devices’ names are shown in Figure .…”

Section: Methodsmentioning

confidence: 99%

Effect of Water Content on Ethanol Steam Reforming in the Nonthermal Plasma

et al. 2023

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Ethanol steam reforming can be a source of green hydrogen. The process of producing hydrogen from ethanol is very complex. Catalysts designed for this process often become deactivated due to coke deposition. In this work, a plasma reactor was used, which is insensitive to disturbance induced by coke. The research focused on determining the influence of steam on the course of the process. The optimal water/ethanol molar ratio was found to be 4. The energy efficiency was the highest at this ratio, 22.5 mol(H 2 )/kW h. At the same time, a high ethanol conversion (92%) was obtained. It was also observed that the conversion of steam was many times lower than that of ethanol. However, water shortage caused a rapid increase in coke, acetylene, and ethylene production.

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Section: Methodsmentioning

confidence: 99%

Effect of Water Content on Ethanol Steam Reforming in the Nonthermal Plasma

et al. 2023

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“…Tatarova et al [9] reported that in the microwave discharge, maximal hydrogen yield was 1.72 mol(H 2 )/mol(CH 3 OH) or 3.01 mol(H 2 )/mol(C 2 H 5 OH), respectively. Our previous studies on the spark discharge showed that more hydrogen could be obtained from ethanol than from methanol [10][11][12]. In contrast, Burlica et al [13] reported that in the gliding discharge, the process of hydrogen production from methanol was higher than that from ethanol.…”

Section: Introductionmentioning

confidence: 94%

Efficient Conversion of Ethanol to Hydrogen in a Hybrid Plasma-Catalytic Reactor

et al. 2022

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The present work describes highly efficient hydrogen production from ethanol in a plasma-catalytic reactor depending on the discharge power and catalyst bed temperature. Hydrogen production increased as the power increased from 15 to 25 W. A further power increase to 35 W did not increase hydrogen production. The catalyst was already active at a temperature of 250 °C, and its activity increased with increasing temperature to 450 °C. The further temperature increase did not increase the activity of the cobalt catalyst. The most important advantage of using the catalyst was the increased ethanol conversion to CO2 instead of CO production. As a result, the hydrogen yield was very high and reached 4.1 mol(H2)/mol(C2H5OH). This result was obtained with a stoichiometric molar ratio of water to ethanol of 3.

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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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Enhanced production of hydrogen from methanol using spark discharge generated in a small portable reactor

Cited by 11 publications

References 61 publications

Effect of Water Content on Ethanol Steam Reforming in the Nonthermal Plasma

Effect of Water Content on Ethanol Steam Reforming in the Nonthermal Plasma

Efficient Conversion of Ethanol to Hydrogen in a Hybrid Plasma-Catalytic Reactor

A Promising Cobalt Catalyst for Hydrogen Production

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