Influence of Co2 on the Catalytic Performance Of La2O3/CeO2 and CaO/CeO2 Catalysts in the Oxidative Coupling of Methane

• Authors: Barbara Litawa , Piotr Michorczyk , Jan Ogonowski
• Languages of publication: EN

Abstracts

EN

In this work the La2O3/CeO2 (33 mol % of La) and CaO/CeO2 (33 mol % of Ca) catalysts were prepared by the impregnation method and characterized by XRD and CO2-TPD. The catalytic properties of the catalysts were tested in the OCM process at 1073 K using the methane/oxygen mixture of the mole ratio 3.7 or 2.5 additionally containing CO2 and helium balance. It was found that in the presence of both catalysts an addition of CO2 enhances the selectivity to the ethylene and ethane and it does not have any negative influence on methane conversion. In the case of the CaO/CeO2 catalyst the promoting effect of CO2 was the highest. When the partial pressure of CO2 equals to 39 kPa the increase in selectivity from 36 to 41% was noted while the conversion of methane equal to 19.4-19.7 %.

Keywords

EN

CO2 effect; OCM; lanthanum oxide; calcium oxide; ethylene

• Publisher: De Gruyter Open
• Journal: Polish Journal of Chemical Technology
• Year: 2013
• Volume: 15
• Issue: 1
• Pages: 22-26

Dates

published

1 - 03 - 2013

online

27 - 03 - 2013

Contributors

author

Barbara Litawa

• Cracow University of Technology, Institute of Organic Chemistry and Technology, Warszawska 24, 31-155, Kraków, Poland
• State Higher Vocational School in Nowy Sącz, Institute of Technology, Zamenhoffa 1a, 33-300 Nowy Sącz, Poland

author

Piotr Michorczyk

• Cracow University of Technology, Institute of Organic Chemistry and Technology, Warszawska 24, 31-155, Kraków, Poland

author

Jan Ogonowski

• Cracow University of Technology, Institute of Organic Chemistry and Technology, Warszawska 24, 31-155, Kraków, Poland

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Identifiers

DOI

10.2478/pjct-2013-0005