II International Symposium on Carbon for Catalysis ABSTRACTS

PP-I-47
It was revealed, that the introduction of nitrogen in КАU improves thermal stability of a
carbon matrix to a surface oxidizing by oxygen of air up to 450 o C and does not result in
essential change of its porous structure.
In figure, for example, the temperature dependences of CO oxidation in hydrogen-rich
mixture on the studied samples is given. It may be seen from the Figure, that the introduction
of nitrogen in a matrix of KAU results in essential increase of activity of catalyst.
Dependence of catalytic activity on the content of nitrogen on the carrier has extreme
character. The sample containing 3 mas. % of nitrogen on a surface of carbon matrix is the
most active. Over this sample 100 % conversion of CO in a reaction mixture containing 98 %
of H 2 is achieved at temperature 160 о С. It is necessary to note, that similar influence of the
contents of nitrogen in samples on their catalytic activity is revealed in [3] for oxidation of
hydrogen sulphide.
It is shown, that activity of the catalyst 5 mas. %. Со/KAU-N with 3 % on mass of nitrogen
did not reduce after 25 hours of work.
Тhus, the use of nitrogen compound carbon as the support of the cobalt/carbon catalysts in
CO oxidation reaction in the hydrogen rich mixtures are the very perspective.
100
Conversion CO, %
80
60
40
20
0
0 100 200 300
Temperature, oC
1
2
3
4
Figure. Dependence of CO conversion in hydrogen-rich mixture from temperature. on:
1 – Со/KAU catalyst, 2 –Со/KAU-N catalyst with 2% on mass nitrogen in carbon matrix.
3 –Со/KAU-N catalyst with 3% on mass nitrogen. . 4 –Со/KAU-N catalyst with 4% on mass
nitrogen in carbon matrix.
References
1 Zaitsev Yu.P. at all, Catalytic properties Со/carbon catalysts in СО oxidation in
hydrogen-rich mixtures IV Intern. Conf. On Enviromental Catalysis”. Heidelberg,
Germany. 05-08 June 2005.
2 Strelko V.at all Abstr. of <strong>International</strong> Conf. On Carbon “Carbon-01” Kentucky (USA).-
2001.-CD-ROM, ISBN 0-9674971-2-4.
3 Bagreev A. at all, Abstr. of <strong>International</strong> Conf. On Carbon July 10-13, 2003, Oviedo,
Spain, ISBN CD-ROM, ISBN 84-607-8305-7.
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