Oxidative Coupling of Methane over YSZ Support Catalysts for Application in C2 Hydrocarbon Production

Authors

  • Kridsada Khammona Chulalongkorn University
  • Wisitsree Wiyaratn King Mongkut's University of Technology Thonburi
  • Weerinda Appamana Chulalongkorn university
  • Suttichai Assabumrungrat Chulalongkorn University

DOI:

https://doi.org/10.4186/ej.2015.19.4.1

Keywords:

OCM, C2 hydrocarbon, electro co-generation, YSZ

Abstract

This paper studies the development of Mn-Na2WO4 catalysts on YSZ support for oxidative coupling of methane reaction. It can be divided into two parts; (1) study in fixed bed reactor (FBR), and (2) study in solid oxide fuel cell reactor (SOFC). In part I, the experiments were performed using co-feeds of methane, oxygen and nitrogen inert gas at a ratio of 4:1:5 for different temperatures (973 - 1173 K). Mn-Na2WO4 catalyst on YSZ support was doped with sulfur, phosphorous, and cerium in order to improve its catalytic reactivity. The results indicated that sulfur and phosphorous showed the good improvement for Mn-Na2WO4 catalyst on YSZ support. At 1073 K, S-Mn-Na2WO4/YSZ provided C2 selectivity of 60.3% and methane conversion of 31.1%, while P-Mn- Na2WO4/YSZ offered C2 selectivity of 59.8% and methane conversion of 34.1%. P-Mn-Na2WO4/YSZ catalyst was selected as anode catalysts for further study in the SOFC reactor. The experiments were carried out using La0.8Sr0.2MnO3 (LSM) as the cathode catalyst, 8 mol% yttria-stabilized zirconia (YSZ) as the electrolyte. P-Mn-Na2WO4/YSZ exhibited the best performance, providing C2H4 selectivity of 89.0%, methane conversion of 10.5% and maximum power density of 7.2 W/m2 at 1123 K. In addition, the stability of the P-Mn-Na2WO4/YSZ catalyst was tested at 1123 K. Good stability of the reaction system could be observed at least for 29 hours.

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Author Biographies

Kridsada Khammona

Centre of Excellence in Catalysis and Catalytic Reaction Engineering, Department of Chemical Engineering, Faculty of Engineering, Chulalongkorn University, Bangkok 10330, Thailand

Wisitsree Wiyaratn

Faculty of Industrial Education and Technology, King Mongkut's University of Technology Thonburi, Bangkok 10140, Thailand

Weerinda Appamana

Centre of Excellence in Catalysis and Catalytic Reaction Engineering, Department of Chemical Engineering, Faculty of Engineering, Chulalongkorn University, Bangkok 10330, Thailand

Suttichai Assabumrungrat

Centre of Excellence in Catalysis and Catalytic Reaction Engineering, Department of Chemical Engineering, Faculty of Engineering, Chulalongkorn University, Bangkok 10330, Thailand

Published

Vol 19 No 4, Jul 31, 2015

How to Cite

[1]
K. Khammona, W. Wiyaratn, W. Appamana, and S. Assabumrungrat, “Oxidative Coupling of Methane over YSZ Support Catalysts for Application in C2 Hydrocarbon Production”, Eng. J., vol. 19, no. 4, pp. 1-11, Jul. 2015.

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