ISSN:
1572-879X
Keywords:
Perovskites
;
oxidative coupling of methane
;
XRD
;
SEM
;
TGA
;
BET
;
CaTiO3-based catalyst
;
sol-gel method
Source:
Springer Online Journal Archives 1860-2000
Topics:
Chemistry and Pharmacology
Notes:
Abstract A series of perovskites of the formula Ca1−x Sr x Ti1−y M y O3−δ, M=Fe, Co, Cr or Ni,x = 0−1,y = 0−0.6, has been synthesized by a modified sol-gel method using citrate. Several of these materials were proved to be stable under operating conditions in reducing atmospheres of air and hydrocarbons. An outline of the synthesis procedure is given, together with the results of XRD, SEM, BET, TG, DTA and IR characterization before and after catalytic testing. The solubility of Ni and Cr in this perovskite was very limited, and the solubility of Co decreased abruptly above 1173 K. The solubility range of Ca and Sr on alkaline earth sites is 100%.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00769496
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