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1

Hydrogen yield from water radiolysis in the presence of zeolites

100%

Cecal A., Colisnic D., Popa K., Paraschivescu A., Bilba N., Cozma D.

Open Chemistry

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2004

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vol. 2

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issue 1

247-253

EN

This paper reports a study of the decomposition of water by gamma radiolysis in the presence of zeolites ZSM-5, SAPO-5, and MOR. The irradiation is performed using 60Co as a source with 1.12×1015 Bq activity at a 8.3 kGy/h dose rate. The stable products of radiolysis as well as the other chemical species are measured by mass spectrometry. The calculated radiation yield (GH 2) generally decreases in the order: H-ZSM-5>Na-ZSM-5>H-SAPO-5>MOR under the given experimental conditions; the yield is higher in the presence of these catalysts than in their absence.

2

Hydrogen production from ethanol in nitrogen microwave plasma at atmospheric pressure

88%

Hrycak B., Czylkowski D., Miotk R., Dors M., Jasinski M., Mizeraczyk J.

Open Chemistry

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2015

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vol. 13

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issue 1

EN

Hydrogen seems to be one of the most promising alternative energy sources. It is a renewable fuel as it could be produced from e.g. waste or bio-ethanol. Furthermore hydrogen is compatible with fuel cells and is environmentally clean. In contrast to conventional methods of hydrogen production such as water electrolysis or coal gasification we propose a method based on atmospheric pressure microwave plasma. In this paper we present results of the experimental investigations of hydrogen production from ethanol in the atmospheric pressure plasma generated in waveguide-supplied cylindrical type nozzleless microwave (2.45 GHz) plasma source (MPS). Nitrogen was used as a working gas. All experimental tests were performed with the nitrogen flow rate Q ranged from 1500 to 3900 NL h-1 and absorbed microwave power PA up to 5 kW. Ethanol was introduced into the plasma using the induction heating vaporizer. The process resulted in an ethanol conversion rate greater than 99%. The hydrogen production rate was up to 728 NL[H2] h-1 and the energy efficiency was 178 NL[H2] per kWh of absorbed microwave energy.

3

Investigation of membrane performance in the separation of carbon dioxide

88%

Tańczyk M., Warmuziński K., Janusz-Cygan A., Jaschik M.

Chemical and Process Engineering

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2011

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vol. 32

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issue 4

291-298

EN

HY2SEPS was an EU-funded project directed at the reduction of CO2 emissions. The principal objective of the project was to develop a hybrid membrane-adsorptive H2/CO2 separation technique that would form an integral element of the pre-combustion process. Specific tasks included the derivation of simplified mathematical models for the membrane separation of H2/CO2 mixtures.In the present study one of the developed models is discussed in detail, namely that with the countercurrent plug flow of the feed and the permeate. A number of simulations were carried out concerning the separation of binary mixtures that may appear following steam conversion of methane. The numerical results were then compared with the experimental data obtained by FORTH/ICEHT. The estimated fluxes of pure CO2, H2, CH4 and N2 are shown alongside those measured experimentally as a function of temperature and CO2 partial pressure in Figs 2 - 7. It is concluded that, in general, CO2 flux increases monotonically with both temperature and CO2 partial pressure. It is also found that the fluxes of hydrogen, methane and nitrogen reach a minimum at a temperature slightly above 323 K. Overall, a good agreement was obtained between the simulations and experiments.

4

Investigation of membrane performance in the separation of carbon dioxide

75%

Janusz-Cygan A., Tańczyk M., Jaschik M., Warmuziński K.

Chemical and Process Engineering

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2011

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issue 4

5

Methane and hydrogen production from potato wastes and wheat straw under dark fermentation

75%

Sołowski G., Konkol I., Shalaby M., Cenian A., Sołowski G., Konkol I., Shalaby M., Cenian A.

Chemical and Process Engineering

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2021

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vol. 42

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issue 1

6

Methanol as a High Purity Hydrogen Source for Fuel Cells: A Brief Review of Catalysts and Rate Expressions

75%

Madej-Lachowska M., Kulawska M., Słoczyński J.

Chemical and Process Engineering

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2017

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vol. 38

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issue 1

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4 Chemical and Process Engineering

2 Open Chemistry

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2 Janusz-Cygan A.

2 Jaschik M.

2 Tańczyk M.

2 Warmuziński K.

1 Bilba N.

1 Cecal A.

1 Cenian A.

1 Colisnic D.

1 Cozma D.

1 Czylkowski D.

1 Dors M.

1 Hrycak B.

1 Jasinski M.

1 Konkol I.

1 Kulawska M.

1 Madej-Lachowska M.

1 Miotk R.

1 Mizeraczyk J.

1 Paraschivescu A.

1 Popa K.

1 Shalaby M.

1 Sołowski G.

1 Słoczyński J.

Hydrogen yield from water radiolysis in the presence of zeolites

Hydrogen production from ethanol in nitrogen microwave plasma at atmospheric pressure

Investigation of membrane performance in the separation of carbon dioxide

Investigation of membrane performance in the separation of carbon dioxide

Methane and hydrogen production from potato wastes and wheat straw under dark fermentation

Methanol as a High Purity Hydrogen Source for Fuel Cells: A Brief Review of Catalysts and Rate Expressions