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Synthesis of cyclic carbonates from epoxides or olefins and CO_2 catalyzed by metal-organic frameworks and quaternary ammonium salts

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Journal of Energy Chemistry 2013年第1期22卷 130-135页

作者： Olga V. Zalomaeva Nataliya V. Maksimchuk Andrey M. Chibiryaev Konstantin A. Kovalenko Vladimir P. Fedin Bair S. Balzhinimaev Boreskov Institute of Catalysis pr. Akademika Lavrentieva 5 Vorozhtsov Novosibirsk Institute of Organic Chemistry pr Akademika Lavrentieva 9 Nikolaev Institute of Inorganic Chemistry pr. Akademika Lavrentieva 3

Catalytic properties of the metal-organic framework Cr-MIL-101 in solvent-free cycloaddition of CO2 to epoxides to produce cyclic carbon- ates using tetrabutylammonium bromide as co-catalyst have been explored under mild reaction conditions （8 bar CO2, 25 ~C）. Styrene and propylene carbonates were formed with high yields （95% and 82%, respectively）. Catalytic performance of Cr-MIL-101 was compared with other MOFs： Fe-MIL-101, Zn-MOF-5 and HKUST-1, The catalytic properties of different quaternary ammonium bromides, Cr-MIL-101 as well as PW12/Cr-MIL-101 composite material have been assessed in oxidative carboxylation of styrene in the presence of both tert-butyl hydroperoxide and H202 as oxidants at 8-100bar CO2 and 25-80 ~C with selectivity to styrene carbonate up to 44% at 57% substrate conversion.

关键词： carbon dioxide cyclic carbonates cycloaddition heterogeneous catalysis metal-organic framework oxidative carboxylation quaternary am-monium salts

CATALYTIC prOPERTIES OF NANOFIBROUS CARBON IN SELECTIVE OXIDATION OF HYDROGEN SULPHIDE

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China Particuology 2006年第2期4卷 70-72页

作者： Gennady G. Kuvshinov Vasiliy V. Shinkarev Alexey M. Glushenkov Maxim N. Boyko Dmitriy G. Kuvshinov Department of Chemical Engineering Novosibirsk State Technical University Pr.Karla Marksa 20 Novosibirsk Russia Group of catalytic technologies of carbon materials synthesis Boreskov Institute of Catalysis Pr.Akademika Lavrentieva 5 Novosibirsk Russia

Nanofibrous carbonaceous materials （NFC） as a new class of materials having many applications, can catalyze the selective oxidation of H2S to sulfur. The correlation between NFC structure and its activity and selectivity in H2S oxidation was determined. It is demonstrated that selectivity can be improved if NFC with more ordered structure be synthesized and the portion of the original catalyst in carbon be reduced by increasing the carbon accumulated in the catalyst.

关键词： nanostructure carbon nanofiber carbon nanotubes carbon yield selective oxidation of the hydrogen sulfide oxygen excess

氧化钴和氮掺杂碳纳米管纳米复合物的催化与容量性质(英文)

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催化学报 2014年第6期35卷 960-969页

作者： Olga Yu.Podyacheva Andrei I.Stadnichenko Svetlana A.Yashnik Olga A.Stonkus Elena M.Slavinskaya Andrei I.Boronin Andrei V.Puzynin Zinfer R.Ismagilov Boreskov Institute of Catalysis Pr.Akademika Lavrentieva 5 Novosibirsk 630090 Russia Novosibirsk State University Ul.Pirogova 2 Novosibirsk 630090 Russia Institute of Coal Chemistry and Material Science Pr.Sovetskiy 18 Kemerovo 650000 Russia

The nanocomposites based on cobalt oxide and nitrogen-doped carbon nanofibers (N-CNFs) with cobalt oxide contents of 10–90 wt% were examined as catalysts in the CO oxidation and supercapacity electrodes. Depending on Со3О4 content, such nanocomposites have different morphologies of cobalt oxide nanoparticles, distributions over the bulk, and ratios of Со3+/Co2+ cations. The 90%Со3О4-N-CNFs nanocomposite showed the best activity because of the increased concentration of defects in N-CNFs. The capacitance of electrodes containing 10%Со3О4-N-CNFs was 95 F/g, which is 1.7 times higher than electrodes made from N-CNFs.

关键词：纳米复合材料碳纳米纤维氧化催化剂氧化物钴含量氮掺杂特性容量

Modified Ceria-Zirconia Fluorite-Like Catalysts for the Combustion of Methane

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Journal of Natural Gas Chemistry 2006年第3期15卷 149-163页

作者： Tatiana Kuznetsova Vladislav Sadykov Lubsan Batuev Ella Moroz Elena Burgina Vladimir Rogov Vladimir Kriventsov Dmitrii Kochubey Boreskov Institute of Catalysis SB RAS Pr. Lavrentieva5Novosibirsk630090Russia

For dispersed ceria-zirconia-based solid solutions prepared via the polymerized complex method and annealed at 700 ℃, effects of bulk doping by Ca, Mn, Co, Bi or Nb cations and surface modification by Mn and Pt on their structural features, surface/bulk oxygen reactivity and catalytic activity in methane combustion are considered. With up to 20 mol% doping, a structural type of homogeneous solid solutions of anion-deficient fluorite with disordered anion vacancies is formed. Doping by transition metal cations or Pt increases the mobility and reactivity of the surface/bulk oxygen. A broad variation in specific rates of methane combustion for the studied systems was observed, suggesting structural sensitivity of this reaction. In general, there is no universal relationship between the oxygen mobility, the reactivity and the catalytic activity in methane combustion, which is explained by the factor of specific methane activation on surface active sites. For the Pt-promoted samples, Pt efficiency in methane activation depends on the Pt-support interaction, and the most favorable ones being mixed Pt/MnOx and Pt/NbOx clusters on the surface of the supports that exhibit high lattice oxygen mobilities.

关键词： Ce-Zr-O Ca Mn Co Bi Nb structural features oxygen reactivity oxygen mobility methane combustion

纤维碳孔洞形态和质地的^(129)Xe核磁共振研究(英文)

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光散射学报 2005年第3期17卷 281-282页

作者： Romanenko K.V. Fraissard J. J.B.Espinose de la Caillerie Lapina O.B. Reshetenko T. Boreskov Institute of Catalysis Pr.Akademika Lavrentieva 5 Novosibirsk Russia 630090Boreskov Institute of Catalysis Pr.Akademika Lavrentieva 5 Novosibirsk Russia 630090Boreskov Institute of Catalysis Pr.Akademika Lavrentieva 5 Novosibirsk Russia 630090Boreskov Institute of Catalysis Pr.Akademika Lavrentieva 5 Novosibirsk Russia 630090Boreskov Institute of Catalysis Pr.Akademika Lavrentieva 5 Novosibirsk Russia 630090

The tasks of nanocarbon morphology and porosity characterization are always actually. So far the texture and microstructure of carbons were examined only by suitable adsorption methods, which are not always effective. The 129Xe NMR on adsorbed xenon was first introduced and developed by Fraissard[1, and references therein]. Unlike zeolites, carbon materials were not studied by 129Xe NMR techniques profoundly. Therefore, correlations of nuclear magnetic resonance parameters with structural and chemical properties of carbons are not established. Nevertheless the Xe NMR is known to be extremely effective tool in characterization of solids such as micro- mesoporous zeolites and amorphous silicas [1, 2]. Hence, it seems that previous 129Xe NMR studies are to be extended on other materials with different surface and textural properties.

关键词：碳纤维 NMR 核磁共振形态学碳纳米管微观结构

纤维碳孔洞形态和质地的129Xe核磁共振研究（英文）

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光散射学报 2005年第3期 93-94页

作者： Romanenko K.V.,Fraissard J.,J.B.Espinose de la Caillerie,Lapina O.B.,Reshetenko T. Boreskov Institute of Catalysis pr.akademika lavrentieva 5 Novosibirsk Russia 630090 Boreskov Institute of Catalysis pr.akademika lavrentieva 5 Novosibirsk Russia 630090 Boreskov Institute of Catalysis pr.akademika lavrentieva 5 Novosibirsk Russia 630090 Boreskov Institute of Catalysis pr.akademika lavrentieva 5 Novosibirsk Russia 630090 Boreskov Institute of Catalysis pr.akademika lavrentieva 5 Novosibirsk Russia 630090

关键词： ppm Xe

Chemical Mechanisms of prebiotic Chirality Amplification

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Research 2020年第1期2020卷 914-921页

作者： Konstantin P.Bryliakov Novosibirsk State University Pirogova 1Novosibirsk 630090Russia Boreskov Institute of Catalysis Pr.Lavrentieva 5Novosibirsk 630090Russia

This review article surveys the recent experimental findings that suggest alternative chemical models of directed chirality amplification at the early,prebiotic *** is believed that the chirality amplification step followed the initial emergence of small enantiomeric imbalance and preceded(as a necessary condition)the occurrence of homochiral biopolymers,assembled from enantiomerically pure building *** work focuses on the chemical nature of possible mechanisms of primordial chirality enhancement,without going into detail of the preceding and subsequent phases of origination of biological homochirality and life on *** mechanisms are discussed through the prism of integrity of biological natural selection and chemical kinetic selection.

关键词： Chiral subsequent finding

Simulation of thermal processes in metamaterial millimeter-wave to infrared converter for millimeter-wave imager

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International Journal of Modeling, Simulation, and Scientific Computing 2014年第S01期5卷 120-128页

作者： Peter S.Zagubisalo Andrey G.Paulish Sergey A.Kuznetsov Novosibirsk Branch of the Institute of Semiconductor Physics Siberian Branch of Russian Academy of Sciences 2/1 pr.Akademika LavrentyevaNovosibirsk 630090Russian Federation Novosibirsk State University 2 ul.PirogovaNovosibirsk 630090Russian Federation

The main characteristics of millimeter-wave(MM-wave)image detector were simulated by means of accurate numerical modeling of thermophysical processes in a metamaterial MM-to-IR *** converter represents a multilayer structure consisting of an ultra thin resonant metamaterial absorber and a perfect emissive *** absorber consists of a dielectric self-supporting film that is metallized from both sides.A micropattern is fabricated from one *** absorption of the MM waves induces the converter heating that yields enhancement of IR emission from the emissive *** emission is detected by IR *** this contribution an accurate numerical model for simulation of the thermal processes in the converter structure was created by using COMSOL Multiphysics *** simulation results are in a good agreement with experimental results that validates the *** simulation shows that the real-time operation is provided for the converter thickness less than 3µm and time response can be improved by decreasing of the converter *** energy conversion efficiency of MM waves into IR radiation is over 80%.The converter temperature increase is a linear function of a MM-wave radiation power within three orders of the dynamic *** blooming effect and ways of its reducing are also *** model allows us to choose the ways of converter structure optimization and improvement of image detector parameters.

关键词： Metamaterials subterahertz waves terahertz waves millimeter waves highimpedance surface ultra-thin absorber focal plane array detector bolometric detectors thermodynamic modeling optical readout system

Operating limits and features of direct air capture on K_(2)CO_(3)/ZrO_(2) composite sorbent

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Chinese Journal of Chemical Engineering 2022年第6期35卷 11-20页

作者： Vladimir S.Derevschikov Janna V.Veselovskaya Anton S.Shalygin Dmitry A.Yatsenko Andrey Z.Sheshkovas Oleg N.Martyanov Boreskov Institute of Catalysis SB RAS Akademika Lavrentieva Av.5630090 NovosibirskRussia Novosibirsk State University Pirogova Str.1630090 NovosibirskRussia

Potassium carbonate-based sorbents are prospective materials for direct air capture(DAC).In the present study,we examined and revealed the influence of the temperature swing adsorption(TSA)cycle conditions on the CO_(2) sorption properties of a novel aerogel-based K_(2)CO_(3)/ZrO_(2) sorbent in a DAC *** was shown that the humidity and temperature drastically affect the sorption dynamic and sorption capacity of the *** a temperature at the sorption stage was 29℃ and a water vapor pressure P_(H2O) in the feed air was 5.2 mbar(1 bar=105 Pa),the composite material demonstrated a stable CO_(2) sorption capacity of 3.4%(mass).An increase in sorption temperature leads to a continuous decrease in the CO_(2) absorption capacity reaching a value of 0.7%(mass)at T=80℃.The material showed the retention of a stable CO_(2) sorption capacity for many cycles at each temperature in the *** PH2O in the inlet air from 5.2 to 6.8 mbar leads to instability of CO_(2) sorption capacity which decreases in the course of 3 consecutive TSA cycles from 1.7%to 0.8%(mass)at T=29℃.A further increase in air humidity only facilitates the deterioration of the CO_(2) sorption capacity of the material.A possible explanation for this phenomenon could be the filling of the porous system of the sorbent with solid reaction products and an aqueous solution of potassium salts,which leads to a significant slowdown in the CO_(2) diffusion in the composite sorbent *** investigate the regeneration step of the TSA cycle in situ,the macro ATRFTIR(attenuated total reflection Fourier-transform infrared)spectroscopic imaging was applied for the first *** was shown that the migration of carbonate-containing species over the surface of sorbent occurs during the thermal regeneration stage of the TSA *** movement of the active component in the porous matrix of the sorbent can affect the sorption characteristics of the composite *** revealed features make it possible

关键词： Zirconia aerogel Potassium carbonate Carbon dioxide Direct air capture Fourier-transform infrared spectroscopic imaging