TY - JOUR

T1 - Synthesis of Nanostructured Carbon on Ni Deposited on Mesoporous Aluminum, and Titanium Oxides. Investigation of Biocatalytic Properties of Lipase Adsorbed on Carbon–Mineral Supports

AU - Kovalenko, G. A.

AU - Perminova, L. V.

AU - Chuenko, T. V.

AU - Rudina, N. A.

PY - 2018/5/1

Y1 - 2018/5/1

N2 - This work is a continuation of the studies devoted to the synthesis of nanostructured carbon (NSC) as a result of the pyrolysis of a mixture of H2 + C3–C4 alkanes on supported Ni catalysts. Mesoporous alumina (γ-Al2O3) and titania (TiO2), on which Ni(II) compounds are deposited by impregnation or homogeneous precipitation, are studied as carriers. Using the methods of thermogravimetric analysis and scanning electron microscopy, it is shown that the activity of Ni catalysts (carbon yield) and the morphology of synthesized NSC are largely determined by the chemical nature of the support. It is found that the synthesis of NSC in the form of carbon nanofibers with a pronounced filamentary structure proceeds only on a Ni catalyst supported on titanium dioxide. The mesoporous carbon–mineral supports obtained after catalytic pyrolysis were studied in the adsorptive immobilization of the enzyme such as Thermomyces lanuginosus lipase. The adsorption properties of the supports, as well as the enzymatic activity and stability of the prepared biocatalysts in the esterification of saturated fatty acids (capric, C10: 0) with aliphatic alcohols (isopentanol, C5) in the non-aqueous media of organic solvents (hexane and diethyl ether) at ambient temperature, are studied. Biocatalysts prepared by lipase adsorption on NSC/TiO2 show the maximum esterification activity of 100 EA/g, which is 20–45 times higher than the activity of lipase adsorbed on NSC/Al2O3.

AB - This work is a continuation of the studies devoted to the synthesis of nanostructured carbon (NSC) as a result of the pyrolysis of a mixture of H2 + C3–C4 alkanes on supported Ni catalysts. Mesoporous alumina (γ-Al2O3) and titania (TiO2), on which Ni(II) compounds are deposited by impregnation or homogeneous precipitation, are studied as carriers. Using the methods of thermogravimetric analysis and scanning electron microscopy, it is shown that the activity of Ni catalysts (carbon yield) and the morphology of synthesized NSC are largely determined by the chemical nature of the support. It is found that the synthesis of NSC in the form of carbon nanofibers with a pronounced filamentary structure proceeds only on a Ni catalyst supported on titanium dioxide. The mesoporous carbon–mineral supports obtained after catalytic pyrolysis were studied in the adsorptive immobilization of the enzyme such as Thermomyces lanuginosus lipase. The adsorption properties of the supports, as well as the enzymatic activity and stability of the prepared biocatalysts in the esterification of saturated fatty acids (capric, C10: 0) with aliphatic alcohols (isopentanol, C5) in the non-aqueous media of organic solvents (hexane and diethyl ether) at ambient temperature, are studied. Biocatalysts prepared by lipase adsorption on NSC/TiO2 show the maximum esterification activity of 100 EA/g, which is 20–45 times higher than the activity of lipase adsorbed on NSC/Al2O3.

KW - biocatalysts

KW - esterification

KW - lipase adsorption

KW - nanostructured carbon

KW - Ni catalysts

KW - CATALYSTS

UR - http://www.scopus.com/inward/record.url?scp=85048157544&partnerID=8YFLogxK

U2 - 10.1134/S0023158418030102

DO - 10.1134/S0023158418030102

M3 - Article

AN - SCOPUS:85048157544

VL - 59

SP - 275

EP - 282

JO - Kinetics and Catalysis

JF - Kinetics and Catalysis

SN - 0023-1584

IS - 3

ER -