The reserves of natural gas are abundant. In this context, the catalytic oxidative coupling of methane (OCM) is an attractive alternative for ethylene production, as compared to current processes based on crude oil. OCM has been investigated in the past and catalytic materials studied include metal oxides/complex metal oxides of alkali earth, transition and rare earth elements [1]. Solution combustion synthesis (SCS) is a novel one-step method for the synthesis of nanostructured complex metal oxides with tailored composition, phase, oxidation state, and surface areas by variation of tunable synthesis parameters [2-4]. In our recent work, SCS was used successfully for synthesis of several OCM catalyst series (a) Strontium�Aluminum mixed oxides, (b) Lanthanum based oxides, and (c) Na2WO4-Mn/SiO2series [5,6].The SCS synthesized Na2WO4-Mn/SiO2catalyst showed the best performance at standard conditions, and was optimized for metal loading, Si precursor, fuel/oxidizer ratio and CH4/O2 feed ratio. The optimum candidate was 5%La-10%Na2WO4-5%Mn/SiO2, which at CH4/O2 feed ratio of 2, showed a high C2 yield of 27% at 800 �C and ethylene/ethane ratio of 3.6. The current work also includes study of the reaction kinetics on this catalyst, for which the details will be discussed during the presentation.Kondratenko, E.V., Baerns, M., in �Handbook of Heterogeneous Catalysis� (G. Ertl, F. Shuth and J. Wietkamp, Eds ) p. 3010. Viley-VCH Verlag, 2008  .Deshpande, K., Mukasyan, A., Varma, A., J. Am. Ceram. Soc. 2003  , 86 (7), 1149.Deshpande, K., Mukasyan, A., Varma, A., Chem. Mater. 2004  , 16(24), 4896.Erri, P., Dinka, P., Varma, A., Chem. Eng. Sci. 2006  , 61 (16), 5328.Ghose, R., Hwang, H.T., Varma, A., Appl. Catal. A: General. 2013  , 452, 147.Ghose, R., Hwang, H.T., Varma, A., US Provisional Patent Application # 61/684,942 (2013  ).

Solution combustion synthesized catalytic materials for oxidative coupling of methane

246th National Meeting (2013)

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