Abstract
The effects of the Pb-Sn-O composition, the method of precipitating the active components, and modification with alkaline earth metals on the physico-chemical and catalytic properties of lead-tin catalysts in oxidative dimerization of methane have been studied. The effect of the phases of lead orthostannate, Pb2SnO4, on the surface properties of the Pb-Sn-O system has been established. The most selective composition has a ratio PbO : SnO2 - 80 : 20 mole % on α-Al2O3 with divalent metal hydroxides. Introduction of alkaline earth metals into the Pb-Sn-O/α-Al2O3 system leads to stabilization of lead in its 4-valent state with formation of metal orthoplumbates, M2PbO4, and to a decrease in selectivity with respect to C2-hydrocarbons. The increased catalytic activity of the modified M-Pb-Sn-O/α-Al2O3 samples (M = Ba, Sr, Ca, and Mg) is determined by the presence of tightly bound oxygen. Conclusions about the nature of the interaction of the reagents with the surface of the catalyst were reached.
| Original language | English |
|---|---|
| Pages (from-to) | 304-310 |
| Number of pages | 7 |
| Journal | Theoretical and Experimental Chemistry |
| Volume | 37 |
| Issue number | 5 |
| DOIs | |
| Publication status | Published - 1 Jan 2001 |
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Effects of composition and method of preparation of lead-containing oxide systems on their catalytic properties in the oxidative dimerization of methane. / Kurzina, I. A.; Galanov, S. I.; Kurina, L. N.
In: Theoretical and Experimental Chemistry, Vol. 37, No. 5, 01.01.2001, p. 304-310.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Effects of composition and method of preparation of lead-containing oxide systems on their catalytic properties in the oxidative dimerization of methane
AU - Kurzina, I. A.
AU - Galanov, S. I.
AU - Kurina, L. N.
PY - 2001/1/1
Y1 - 2001/1/1
N2 - The effects of the Pb-Sn-O composition, the method of precipitating the active components, and modification with alkaline earth metals on the physico-chemical and catalytic properties of lead-tin catalysts in oxidative dimerization of methane have been studied. The effect of the phases of lead orthostannate, Pb2SnO4, on the surface properties of the Pb-Sn-O system has been established. The most selective composition has a ratio PbO : SnO2 - 80 : 20 mole % on α-Al2O3 with divalent metal hydroxides. Introduction of alkaline earth metals into the Pb-Sn-O/α-Al2O3 system leads to stabilization of lead in its 4-valent state with formation of metal orthoplumbates, M2PbO4, and to a decrease in selectivity with respect to C2-hydrocarbons. The increased catalytic activity of the modified M-Pb-Sn-O/α-Al2O3 samples (M = Ba, Sr, Ca, and Mg) is determined by the presence of tightly bound oxygen. Conclusions about the nature of the interaction of the reagents with the surface of the catalyst were reached.
AB - The effects of the Pb-Sn-O composition, the method of precipitating the active components, and modification with alkaline earth metals on the physico-chemical and catalytic properties of lead-tin catalysts in oxidative dimerization of methane have been studied. The effect of the phases of lead orthostannate, Pb2SnO4, on the surface properties of the Pb-Sn-O system has been established. The most selective composition has a ratio PbO : SnO2 - 80 : 20 mole % on α-Al2O3 with divalent metal hydroxides. Introduction of alkaline earth metals into the Pb-Sn-O/α-Al2O3 system leads to stabilization of lead in its 4-valent state with formation of metal orthoplumbates, M2PbO4, and to a decrease in selectivity with respect to C2-hydrocarbons. The increased catalytic activity of the modified M-Pb-Sn-O/α-Al2O3 samples (M = Ba, Sr, Ca, and Mg) is determined by the presence of tightly bound oxygen. Conclusions about the nature of the interaction of the reagents with the surface of the catalyst were reached.
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U2 - 10.1023/A:1013811100759
DO - 10.1023/A:1013811100759
M3 - Article
VL - 37
SP - 304
EP - 310
JO - Theoretical and Experimental Chemistry
JF - Theoretical and Experimental Chemistry
SN - 0040-5760
IS - 5
ER -