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Direct partial oxidation of methane into synthesis gas over Rh|YSZ|Ag

โœ Scribed by K. Takehira; T. Hayakawa; S. Hamakawa; T. Tsunoda; K. Sato; J. Nakamura; T. Uchijima

Publisher
Elsevier Science
Year
1996
Tongue
English
Weight
473 KB
Volume
29
Category
Article
ISSN
0920-5861

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โœฆ Synopsis

An electrochemical membrane reactor, RhlYSZIAg, has been tested for the partial oxidation of CH 4 to CO/H 2 under 'oxygen pumping' through YSZ. An ionically transported oxygen species over the Rh anode was highly active for the partial oxidation. The reaction mode of the CH 4 oxidation strongly depends on the surface state of Rh particles; a highly oxidized Rh surface accelerates complete oxidation of CH 4 to CO2/H20, while a reduced Rh surface catalyzes the partial oxidation to CO/H 2. Oxygen concentration over the Rh predominantly determines the selectivity; a high oxygen concentration leads to the complete oxidation, while an adsorbed oxygen species gives the partial oxidation.

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