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Plazmowa technologia wytwarzania wodoru

Ulejczyk Bogdan, Młotek Michał, Krawczyk Krzysztof

Przemysł Chemiczny

2023

T. 102, nr 2

173--178

Przedstawiono wyniki badań wytwarzania wodoru z mieszaniny wody i etanolu w plazmie wyładowania iskrowego. Wyładowanie iskrowe jest niewrażliwe na powstanie sadzy. Badano wpływ mocy wyładowania, natężenia i składu strumienia zasilającego reaktor na przebieg procesu wytwarzania wodoru. Największa uzyskana wydajność energetyczna wytwarzania wodoru wynosiła 605 L/kWh.

A mixt. of water and ethanol, with a molar ratio in the range of 3-6, was subjected to a spark discharge plasma. The effect of discharge power, reactant flow rate and reactor feed stream compn. on the H₂ production process was studied. The highest energy efficiency of H₂ production was 605 L/kWh. The spark discharge was insensitive to soot formation.

Nickel catalyst in coupled plasma-catalytic system for tar removal

Woroszył-Wojno Joanna, Młotek Michał, Ulejczyk Bogdan, Krawczyk Krzysztof

Polish Journal of Chemical Technology

2021

Vol. 23, nr 3

24--29

Tar formation is a significant issue during biomass gasification. Catalytic removal of tars with the use of nickel cata-lyst allows to obtain high conversion rate but coke formation on catalysts surface lead to its deactivation. Toluene decomposition as a tar imitator was studied in gliding discharge plasma-catalytic system with the use of 5%, 10% and 15% by weight Ni and NiO catalyst on Al2O3 (α-Al2O3) and Peshiney (γ-Al2O3) carrier in gas composition similar to the gas after biomass pyrolysis. The optimal concentration of nickel was identified to be 10% by weight on Al2O3. It was stable in all studiedinitial toluene concentrations, discharge power while C7H8 conversion rate remained high – up to 82%. During the process, nickel catalysts were deactivated by sooth formation on the surface. On catalysts surface, toluene decomposition products were identified including benzyl alcohol and 3-hexen-2-one.