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Oxidation of diesel soot on binary oxide Cu Cr(Co)-based monoliths

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Journal of Environmental Sciences 2015年第2期27卷 171-177页

作者： Sergiy O.Soloviev Andriy Y.Kapran Yaroslava P.Kurylets l.v.pisarzhevskii institute of physical chemistry National Academy of Sciences of Ukraine

Binary oxide systems（Cu Cr2O4, Cu Co2O4）, deposited onto cordierite monoliths of honeycomb structure with a second support（finely dispersed Al2O3）, were prepared as filters for catalytic combustion of diesel soot using internal combustion engine’s gas exhausts（O2, NOx, H2 O, CO2） and O3 as oxidizing agents. It is shown that the second support increases soot capacity of aforementioned filters, and causes dispersion of the particles of spinel phases as active components enhancing thereby catalyst activity and selectivity of soot combustion to CO2. Oxidants used can be arranged with reference to decreasing their activity in a following series： O3 NO2〉 H2 O 〉 NO 〉 O2〉 CO2. Ozone proved to be the most efficient oxidizing agent： the diesel soot combustion by O3 occurs intensively（in the presence of copper chromite based catalyst） even at closing to ambient *** obtained give a basis for the conclusion that using a catalytic coating on soot filters in the form of aforementioned binary oxide systems and ozone as the initiator of the oxidation processes is a promising approach in solving the problem of comprehensive purification of automotive exhaust gases at relatively low temperatures, known as the ＂cold start＂ problem.

关键词： Catalyzed diesel particulate filters Cu Cr2O4 Cu Co2O4catalytic coatings Cordierite monoliths Second support Oxidizing agents Ozone

Carbon dioxide reforming of methane on monolithic Ni/Al_2O_3-based catalysts

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Journal of Natural Gas chemistry 2011年第2期20卷 184-190页

作者： S. O. Soloviev A. Yu. Kapran S. N. Orlyk E. v. Gubareni l. v. pisarzhevskii institute of physical chemistry National Academy of Sciences of Ukraine

Nickel-alumina catalysts supported on cordierite monoliths of honeycomb structure surpass essentially the conventional granulated ones with respect to the output in carbon dioxide reforming of methane. Adjusting the surface acid-base properties of catalysts by introduction of alkali metal （Na, K） oxides inhibits the carbonization and as a result, improves the operational stability of these catalysts. An effect of promotion of nickel-alumina based composite doped by lanthanum oxide is found. This effect, caused by an additional route for the CO2 activation on Ni-la2O3/Al2O3/cordierite catalyst, is displayed in increase of methane conversion under conditions of an oxidant excess.

关键词： methane carbon dioxide reforming hydrogen syngas Ni/Al2O3 catalysts cordierite monolithic supports honeycomb structure sodium and potassium lanthanum oxide modifying additives

Effect of CeO_2 and Al_2O_3 on the activity of Pd/Co_3O_4/cordierite catalyst in the three-way catalysis reactions(CO/NO/C_nH_m)

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Journal of Environmental Sciences 2012年第7期24卷 1327-1333页

作者： Sergiy O.Soloviev Pavlo I.Kyriienko Nataliia O.Popovych l.v.Pisarzhevsk institute of physical chemistry National Academy of Sciences of Ukraine

The present article studies the effect of CeO2 and A1203 on the activity of Pd/Co304/cordierite catalyst in conversion of NO, CO, CnHm. The catalysts were characterized by temperature programmed reduction with hydrogen, X-ray diffraction, X-ray photoelectron spectroscopy and transmission electron microscopy. It is shown that the effect of CeO2 on the properties of Pd/C03 O4/cordierite catalyst depends on preparation method. The catalyst obtained by co-deposition of cerium and cobalt oxides has higher activity in CO oxidation （CO ＋ 02 and CO ＋ NO） and total hexane oxidation （C6H14 ＋ 02）. Such phenomenon is probably caused by more than stoichiometric amount of formed oxygen vacancies, an increase in both mobility of surface oxygen and dispersity of components in the catalytic composition. It is demonstrated that CeO2 addition promotes the SO2 resistance of Pd/C03 O4/cordierite. The second support decreases the activity of Pd/Co3Oa/cordierite catalyst in the reactions of CO and C6H14 with oxygen because of COA1204 formation.

关键词： metal-oxide catalysts structured catalysts effect of CeO2 and A1203 CO NO CnH,. conversion

Methane oxidative carbonylation catalyzed by rhodium chalcogen halides over carbon supports

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Journal of Natural Gas chemistry 2008年第1期17卷 1-7页

作者： G.R.Kosmambetoval P.E.Strizhak v.I.Gritsenko S.v.volkov l.B.Kharkova O.G.Yanko O.M.Korduban l.v Pisarzhevsky institute of physical chemistry of National Academy of Sciences of ukraine pr.Nauki 31Kiev03039Ukraine v.I.vernadsky institute of General and Inorganic chemistry of National Academy of Sciences of ukraine pr.PaUadina 32/34Kiev03680Ukraine v.I.vernadsky institute of General and Inorganic chemistry of National Academy of Sciences of ukraine pr.Palladina 32/34Kiev03680Ukraine G.v.Kurdyumov institute of Metal Physics of National Academy of Sciences of ukraine 36Vernadskij avKyiv03680Ukraine

Gas phase carbonylation of methane is studied in the presence of molecular oxygen over pure carbon carriers and carbon supported rhodium chalcogen halides. Activated carbons and fullerene blacks have been used as carbon supports. XPS and IR-spectroscopy data show the formation of rhodium chalcogen halides in solids prepared by different methods. We have found that the productivity of acetic acid by carbon supported rhodium chalcogen halides depends strongly on the carbon carrier and the method of the catalyst preparation. Namely, the catalyst with highest productivity for the acetic acid is prepared by synthesizing the rhodium chalcogen halide over the carbon support followed by thermal destruction. We have also found that rhodium chalcogen halides over activated carbons are more active compared with fullerene supported catalysts.

关键词： catalysts methane oxidative carbonylation rhodium chalcogen halides carbon supports

纳米级ZnO/MgO固体的合成及其对CO的氧化活性(英文)

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催化学报 2008年第11期29卷 1079-1083页

作者： Olga Z. DIDENKO Gulnara R. KOSMAMBETOvA Peter E. STRIZHAK l.v.Pisarzhevsky institute of physical chemistry of the National Academy of Sciences of ukraine

The ZnO/MgO solid samples containing the ZnO nanoparticles of controllable size were prepared using colloidal technique. The catalytic performance of the ZnO/MgO samples for the CO oxidation was measured. It was revealed that the rate of the CO oxidation reaction on the ZnO nanoparticles with variable average radius (2.01-2.29 nm) shows nonmonotonic dependence caused by the quantum-confinement effect.

关键词：纳米氧化锌氧化镁催化剂氧化活性一氧化碳

Catalytic performance of ternary Mg-Al-Ce oxides for ethanol conversion into 1-butanol in a flow reactor

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燃料化学学报 2021年第3期49卷 346-357,I0001-I0010页

作者： Olga v.larina Karina v.valihura Pavlo I.Kyriienko Nina v.vlasenko Dmytro Yu.Balakin Ivan Khalakhan Katerina veltruská Tomaz Cendak Sergiy O.Soloviev Svitlana M.Orlyk l.v.Pisarzhevsky institute of physical chemistry of the National Academy of Sciences of ukraine 31 Prosp.Nauky03028 KyivUkraine institute of Physics of the National Academy of Sciences of ukraine 46 Prosp.Nauky03028 KyivUkraine Charles University Faculty of Mathematics and PhysicsDepartment of Surface and Plasma ScienceV Holešovičkách 218000 PragueCzech Republic National institute of chemistry Department of Inorganic Chemistry and TechnologyHajdrihova 19SI-1001 LjubljanaSlovenia

An investigation of hydrotalcite-derived ternary Mg-Al-Ce oxides as catalysts for vapour phase condensation of ethanol to 1-butanol in a flow reactor under atmospheric pressure was carried *** Mg-Al-Ce oxide systems with Mg/(Al+Ce)ratio from 1 to 4 were synthesized and characterized by XRD,SEM,NMR,and *** study of acid-base characteristics of the systems with different Mg/(Al+Ce)ratio by NH3/CO_(2)quasi-equilibrium thermal desorption techniques shows that the ratio of the catalyst oxide components(Mg,Al,Ce)can provide acid/base capacity ratio close to 3 for the effectivity of the target *** highest selectivity 68%is reached over Mg-Al-Ce oxide catalyst with the ratio of Mg/(Al+Ce)=2.

关键词： ethanol 1-butanol Mg-Al-Ce hydrotalcite-derived oxides acid-base properties

Catalytic perfomance of rhodium chalcogen halides and rhodium chalcogenides over silica supports in methane oxidative carbonylation

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Journal of Natural Gas chemistry 2009年第4期18卷 399-406页

作者： S. v. volkov G. R. Kosmambetova l. B. Kharkova O. v. Shvets O. G. Yanko v. I. Gritsenko P. E. Strizhak v. I. vernadskii institute of General and Inorganic chemistry of the Ukrainian National Academy of Sciences l. v. Pisarzhevsky institute of physical chemistry of the Ukrainian National Academy of Sciences

The gas phase methane oxidative carbonylation was studied in the presence of molecular oxygen over silica materials including their mechanical mixtures with rhodium chalcogen chlorides obtained in non-aqueous inorganic media. The formation of Rh4SCl7, Rh4S9Cl2, Rh4SesCl3 and Rh3Se3Cl solids was confirmed by elemental analysis, IR absorption spectroscopy, XPS and X-ray diffraction. Silica, vanadium-, and molybdenum-containing mesoporous molecular sieves have been used as supports. It was found that productivity of oxygenates （methanol, methyl acetate and acetic acid） depends mainly on the method of the catalyst preparation and the type of the support.

关键词： catalysts rhodium chalcogen halides methane oxidative carbonylation silica supports

Deposition of Monodisperse Platinum Nanoparticles of Controlled Size on Different Supports

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Advances in Nanoparticles 2013年第1期2卷 32-38页

作者： Zinaida Kaidanovych Yevhen Kalishyn Peter Strizhak l.v. Pisarzhevsky institute of physical chemistry The National Academy of Sciences of Ukraine Kyiv Ukraine

Monodisperse platinum nanoparticles with controlled size were synthesized by polyol synthesis and supported on γ-Al2O3, SiO2 and carbon nanotubes (CNT) by the colloid deposition method. The average size of Pt nanoparticles in colloidal solutions and on supports were determined by TEM images and from XRD patterns. The size of Pt nanoparticles supported on SiO2 and CNT determined from XRD patterns is in a good agreement with size obtained from the TEM analyses. There were shown that no agglomeration and size changing of Pt nanoparticles on these supports were observed. All these findings illustrate that the method of colloid deposition allows one to obtain catalyst with monodisperse platinum nanoparticles of controlled size deposited on different supports without changing the nanoparticle’s size and morphology.

关键词： Platinum Nanoparticles Pt/γ-Al2O3 Pt/SiO2 Pt/CNT

TPR Study of Core-Shell Fe@Fe<sub>3</sub>O<sub>4</sub>Nanoparticles Supported on Activated Carbon and Carbon Nanotubes

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Advances in Materials Physics and chemistry 2012年第1期2卷 17-22页

作者： Igor Bychko Yevhen Kalishyn Peter Strizhak l.v. Pisarzhevsky institute of physical chemistry The National Academy of Sciences of Ukraine Kyiv Ukraine

Core-shell nanoparticles Fe@Fe3O4 supported on activated carbon (AC) and carbon nanotubes (CNTs) have been studied by H2 temperature-programmed reduction (TPR). Nanoparticles with size of 6.5 nm were synthesized by iron(II) oleate thermal decomposition and were supported on activated carbon and carbon nanotubes by colloid deposition method. The nanoparticles Fe@Fe3O4 are characterized by TEM and IR. Reduction of nanoparticles on AC starts at 140?C, whereas reduction of nanoparticles on CNTs starts at 200?C. Moreover, gasification of CNTs with methane releasing starts at 450?C, whereas gasification of AC is negligible at temperatures up to 800?C. All these findings illustrate a strong difference in the interaction between nanoparticles and the support material for AC and CNTs.

关键词： Iron Nanoparticles Carbon Nanotubes Temperature-Programmed Reduction