G. A. Kovalenkoa, b, *, T. V. Chuenkoa, L. V. Perminovaa, and N. A. Rudinaa
a Boreskov Institute of Catalysis, Siberian Branch, Russian Academy of Sciences, Novosibirsk, 630090 Russia
b Novosibirsk State University, Novosibirsk, 630090 Russia
*e-mail: galina@catalysis.ru
Received September 15, 2015
Abstract—This work continues a series of our studies on the synthesis of nanostructured carbon (NSC) by the
pyrolysis of H2 + C3–C4 alkane mixtures on nickel and cobalt metal catalysts supported on chemically diverse
inorganic materials (aluminosilicates, alumina, carbon) having different textural characteristics (mesoporous
and macroporous supports) and shapes (granules, foamed materials, and honeycomb monoliths). Here, we con-
sider Ni catalysts supported on granular mesoporous silica (SiO2). It has been elucidated how the yield of syn-
thesized carbon depends on the Ni/SiO2 catalyst preparation method (homogeneous precipitation or impregna-
tion) and on the composition of the impregnating solution, including the molar ratio of its components—nickel
nitrate and urea. The morphology of catalytic NSC and Ni distribution in the silica granule have been investi-
gated using a scanning electron microscope with an EDX analyzer. Carbon-containing composite supports
(NSC/SiO2) have been employed as adsorbents for immobilizing microbial lipase. The enzymatic activity and
stability of the resulting biocatalysts have been estimated in transesterification reactions of vegetable (sunflower
and linseed) oils involving methyl or ethyl acetate, esterification, and synthesis of capric acid–isoamyl alcohol
esters in nonaqueous media.
Keywords: supported Ni catalysts, nanostructured carbon, lipase adsorption, heterogeneous biocatalysts, ester-
ification, transesterification
10.1134/S002315841603006X
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