Oxidative coupling of methane using catalysts synthesized by solution combustion method

Authors: Ranjita Ghose, Hyun Tae Hwang, Arvind Varma

Abstract:
Solution combustion synthesis (SCS) is a one-step technique for the preparation of nanostructured complex metal oxides. In the present study, SCS was used for the synthesis of several promising oxidative coupling of methane (OCM) catalyst series with varying metal ratios: (a) Sr–Al complex oxides, (b) La₂O₃, (c) La–Sr–Al complex oxides and (d) Na₂WO₄–Mn/SiO₂. The C₂ yield and ethylene/ethane ratio were measured for each catalyst over a wide range of temperatures. It was found that the double perovskite phase is active for OCM in the Sr–Al complex oxide series. The Na₂WO₄–Mn/SiO₂ catalyst synthesized by SCS was stable and also showed high ethylene/ethane ratio ∼2 along with high C₂ yield ∼25%, which is among the highest value reported in the literature, indicating that SCS is a promising method to prepare OCM catalysts.

Keywords:
Oxidative coupling
Solution combustion synthesis (SCS)
Ethylene
Methane
Complex oxide catalysts

Published in: Applied catalysis A: General  (Volume 452, Pages 1-222, 15 February 2013)

Publisher: Elsevier

ISSN Information: 0926-860X

Oxidative coupling of methane using catalysts synthesized by solution combustion method

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