S. Hamakawa et al., Partial oxidation of propene to acrylaldehyde with an electrochemical membrane reactor coated with yttria-stabilized zirconia, EL SOLID ST, 1(5), 1998, pp. 220-221
An electrochemical reactor, constructed from a Sm-doped ceria solid electro
lyte (SDC) coated with yttria-stabilized zirconia (YSZ) has been employed f
or the partial oxidation of propene at 623-723 K. Upon application of a dir
ect current to the reactor, acrylaldehyde is formed at the gold anode, its
formation rate linearly increasing with increasing direct current. Selectiv
ities to acrylaldehyde, carbon monoxide, and carbon dioxide, based on the c
onverted propene, were 36.1, 11.9, and 52%, respectively, at 723 K. The sel
ectivity to acrylaldehyde obtained was about 4.2 times higher than that obt
ained using SDC alone as a solid electrolyte at 723 K. This result indicate
s that the YSZ coating on the anode side of SDC reduces the complete oxidat
ion of propene at the cerium oxide surface. In addition, the investigation
of the stacked membrane reactor makes it possible to decrease the reaction
temperature from 723 to 623 K. (C) 1998 The Electrochemical Society. S1099-
0062(98)07-017-5. All rights reserved.