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 |
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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
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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
AN - SCOPUS:52549108987
VL - 37
SP - 304
EP - 310
JO - Theoretical and Experimental Chemistry
JF - Theoretical and Experimental Chemistry
SN - 0040-5760
IS - 5
ER -