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- Title
Metanın oksidatif birleşme reaksiyonu için Mn/Na<sub>2</sub>WO<sub>4</sub>/SiO<sub>2</sub> katalizörü üzerinde reaksiyon parametrelerinin etkisinin incelenmesi.
- Authors
Özdemir, Hasan; Öksüzömer, M. A. Faruk; Gürkaynak, Mehmet Ali
- Abstract
The influence of reaction parameters on the 2Mn/5Na2WO4/SiO2 catalyst for the oxidative coupling of methane was investigated and compared with the results of non-catalytic reaction. The effects of oxidant type (O2 and N2O), CH4/O (1/1-4/1) ratio, GHSV (7500-37500 L kg-1 h-1) and temperature (740-820°C) were evaluated by using one variable at a time procedure. Activity tests showed that high C2 yields could be obtained at low CH4/O ratios and space velocities independent of the oxidant type (O2 or N2O) and reaction medium (catalytic or non-catalytic) within the selected range of parameters. Continuous increase in temperature enhanced the C2 yield especially when N2O was used during the reactions performed without catalyst. The highest C2 yield was 16.4% with the catalyst at CH4/O=1, 7500 L kg-1 h-1 and 780°C using O2. It was found that the highest C2 yield without the catalyst use was 10.1% at CH4/O=1, 7500 L kg-1 h-1 and 820°C using N2O. The catalyst activity towards O2 dissociation is well but poor for N2O decomposition. It was observed that the catalyst did not deactivate despite some sintering and phase changes during 8 hours.
- Subjects
OXIDATIVE coupling; CATALYSTS; OXIDIZING agents; METHANE; SINTERING; METHANATION
- Publication
Journal of the Faculty of Engineering & Architecture of Gazi University / Gazi Üniversitesi Mühendislik Mimarlık Fakültesi Dergisi,, 2020, Vol 35, Issue 1, p495
- ISSN
1300-1884
- Publication type
Article
- DOI
10.17341/gazimmfd.480653