Bulletin of the Chemical Society of Japan p. 1799 - 1806 (1993)
Update date:2022-08-29
Topics:
Yamagata, Nobutsugu
Igarashi, Kouji
Saitoh, Hiroki
Okazaki, Susumu
A voluminous composite oxide of BaLa2O4 was prepared by kneading powders of Ba(OH)2*8H2O (A) and La(NO3)3*6H2O (B) with a small amount of water, followed by pyrolysis at 1100 deg C.The resulting material (apparent volume of ca. 3 cm3 g-1) was found to be effective as a catalyst for the oxidative coupling of methane to ethane and ethylene.The preparative conditions of the voluminous BaLa2O4 catalyst and these effects on the C2 formation were investigated.When reagents A and B were mixed with each other at 33 atom-percent Ba and then calcined for 10 min at 1100 deg C, the BaLa2O4 composite oxide was most advantageously produced and a high C2 yield of ca. 19percent was reproducibly obtained over a non-pressed or voluminous catalyst.The high surface basicity and macro-porous structure of the voluminous BaLa2O4 catalyst, which were responsible for its high C2 yield, are discussed.
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