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101.
102.
L. G. P’yanova V. A. Likholobov L. K. Gerunova M. S. Drozdetskaya A. V. Sedanova N. V. Kornienko 《Russian Journal of Applied Chemistry》2017,90(12):2004-2008
Adsorption properties of carbon sorbents modified with glycolic and lactic acid oligomers and copolymers of these toward organic dyes of varied nature: Methylene Blue and Metanil Yellow were studied. Differences in the adsorption of the dyes by the modified sorbents, due to the nature of their surface, were found. 相似文献
103.
O.?A.?KokhanovskayaEmail author V.?A.?Likholobov 《Russian Journal of Applied Chemistry》2018,91(1):78-81
Modification of the composition of polyvinyl alcohol/carbon black aerogel composite materials was performed to make them hydrophobic. The physicochemical properties of the matrices obtained, including their thermal conductivity and resistance to aggressive media and water, were studied. Materials with the moisture capacity decreased by up to 96%, exhibiting resistance to aggressive organic media and high heat insulation properties, were obtained. 相似文献
104.
E. S. Lokteva S. V. Klokov E. V. Golubina K. I. Maslakov M. V. Trenikhin Yu. D. Ivakin V. A. Likholobov 《Russian Chemical Bulletin》2016,65(11):2618-2627
Palladium supported on carbon (Pd/C) catalysts (0.55–0.65 wt.% of Pd) were synthesized by pyrolysis of birch sawdust under inert atmosphere proceeded by prolonged impregnation of sawdust in aqueous solution of palladium nitrate. In some cases, hydrothermal treatment (HT) of the pristine sawdust was conducted to modify the specific surface area of the final carbon material applied as a catalyst support. Based on low-temperature nitrogen adsorption technique, it was postulated that HT of sawdust in the liquid phase increases. while HT in the gaseous phase decreases the specific surface area of Pd/C. The obtained catalysts contained Pd particles (size ranged from 2 to 10 nm) both coated and not coated with carbon shell as evidenced by XPS and TEM techniques. The synthesized Pd/C composites provide high conversion of chlorobenzene and high selectivity in respect to benzene in hydrodechlorination reaction performed in a flow fixed-bed reactor in the presence of H2. XPS data for Pd/C composites tested in the catalytic reaction indicate their high resistance to HCl. A minor part of metal Pd was found to transform into PdCl2 and PdO. 相似文献
105.
L. G. Detusheva L. I. Kuznetsova N. I. Kuznetsova L. S. Dovlitova A. A. Vlasov V. A. Likholobov 《Russian Journal of Inorganic Chemistry》2008,53(5):690-695
The formation of bimetallic Pd(II) and M = Fe(III), Ti(IV), V(V), Co(II), or Cu(II) complexes with the two-vacancy [As2W19O67(H2O)]14? heteropolyanion (HPA) (below referred to as As2W19) has been studied by UV/Vis and IR spectroscopy and differential dissolution. In an aqueous solution at pH 6 and a Pd: M: As2W19 molar ratio of 1: 1: 1, heteropoly complexes (HPC) incorporating two different metals one being Pd(II) are formed. The resulting complexes were precipitated from solution as cesium salts. In the case of Pd(II) and M = Fe(III), Co(II), or Cu(II) ions, the precipitate contained bimetallic HPC [As2W19FePDO67(H2O)2]9? (65.9 wt %), [As2W19CoPdO67(H2O)2]10? (45.6 wt %), and [As2W19CuPdO67(H2O)2]10? (50.7 wt %) mixed with monometallic HPC [As2W19M2O67(H2O)2](14 ? 2m)? (As2W19M2). In the case of Pd(II) and Ti(IV) or V(V), bimetallic HPC of a different composition were precipitated, namely, [As2W19Ti2O67(OH x )2 PdO](10 ? 2x)? (76.8 wt %) and [As2W19V2O67(OH x )2 PdO](8 ? 2x)? (15.0 wt %), where palladium ions are not incorporated in the HPC structure but are attached to the HPC surface, possibly, as hydroxide species. Using M = Pd(II), Ti(IV), V(V) ions and the HPA As2W19 ([M]: [As2W19] = 2 : 1, pH 6), new monometallic HPC, [As2W19Pd2O67(H2O)2]10?, [As2W19Ti2O67(OH x )2](10 ? 2x)?, and [As2W19V2O67(OH x )2](8 ? 2x)? (x = 0, 1, or 2), were obtained. 相似文献
106.
V. A. Likholobov L. G. P’yanova O. N. Baklanova V. A. Drozdov L. S. Luzyanina A. N. Salanov A. V. Veselovskaya O. A. Chirkova 《Russian Journal of Applied Chemistry》2010,83(3):406-413
The carbon sorbent surface was modified with carboxy and amino groups. As modifying agent served aminocaproic acid combining
the hydrophilic terminal groups with the hydrophobic hydrocarbon chain, which affords a balance between the groups when contacting
proteins. The conditions and parameters of aminocaproic acid polycondensation were elucidated that allows the polymeric modifier
to be strongly fixed on the carbon surface. 相似文献
107.
We studied methane pyrolysis of at 750 to 1100°C on a heat-treated FeCrAl wire heated by electric current both in the absence of oxygen and at CH4 : O2 = 15 : 1 and 9 : 1. The process proceeds in two temperature ranges differing in pyrolysis product selectivity. In the transition region, intensive carbon deposition occurs on the wire surface. The presence of oxygen shifts the methane conversion versus temperature and product selectivity versus temperature curves to higher temperatures. We believe that the existence of two process regions is due to the coking of the catalyst surface. 相似文献
108.
L. I. Kuznetsova L. G. Detusheva N. I. Kuznetsova S. V. Koshcheev V. I. Zaikovskii Yu. A. Chesalov V. A. Rogov V. B. Fenelonov V. A. Likholobov 《Kinetics and Catalysis》2009,50(2):205-219
Acid salts Cs x H3 + n ? x PMo12 ? n V n O40 (n = 0, 1, 2, or 3; x = 2.5 or 3.5) with coprecipitated or supported platinum were studied using thermogravimetry, IR spectroscopy, and temperature-programmed reduction. The thermal region of the full stability of these salts is limited by the decomposition temperature of the corresponding acid H3PMo12O40 (~400°C) or H3 + n PMo12 ? n V n O40 (~300–350°C). The degree of reduction of heteropoly anions with hydrogen is regulated by temperature. Deeply reduced heteropoly anions (at 300°C) are slowly oxidized with oxygen with structure and composition regeneration. The states of molybdenum and vanadium on the surface of samples with coprecipitated platinum Pt0.1-Cs2.5H0.5PMo12O40 (1) and Pt0.1-Cs2.5H2.5PMo10V2O40 (2), which were studied using XPS, correspond to reduced or reoxidized heteropoly anions in the bulk. Platinum metal particles of ~5 nm in size were observed in high-resolution TEM images obtained after the reduction and storage of sample 1 in air. A heteropoly compound forms two texture levels: spherical nanoparticles of 10–20 nm in size are collected in closely packed globules of 100–300 nm in size. Detailed texture studies, which were performed using nitrogen adsorption isotherms, demonstrated texture mobility under the ambient conditions. The cesium salts of the heteropoly acids were tested in the gas-phase oxidation of benzene to phenol with an O2 + H2 mixture at 180°. The effect of platinum concentration on the specific catalytic activity in the presence of deeply reduced heteropoly anions was monitored. The samples containing the salt Cs2.5H0.5PMo12O40 exhibited the highest activity in the formation of phenol. The introduction of vanadium into the heteropoly anion impaired the catalytic performance of both deeply and slightly reduced samples. 相似文献
109.
110.
G. N. Ilinich L. Ya. Startseva V. A. Semikolenov V. A. Likholobov Yu. I. Yermakov 《Reaction Kinetics and Catalysis Letters》1986,31(1):55-60
Influence of alkaline and acidic promoters on the composition of CO hydrogenation products on SiO2-supported metallic palladium and rhodium has been examined. Alkaline and acidic promoters have been established to increase the yield of methanol and ethanol, respectively.
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