Zobrazeno 1 - 10
of 21
pro vyhledávání: '"Ralitsa Velinova"'
Autor:
Ralitsa Velinova, Silviya Todorova, Daniela Kovacheva, Hristo Kolev, Yordanka Karakirova, Pavel Markov, Katerina Tumbalova, Georgi Ivanov, Anton Naydenov
Publikováno v:
Materials, Vol 16, Iss 20, p 6784 (2023)
New results on the effect of TiO2 on Pd/La2O3-CeO2-Al2O3 systems for catalytic oxidation of methane in the presence of H2O and SO2 have been received. Low-temperature N2-adsorption, XRD, SEM, HRTEM, XPS, EPR and FTIR techniques were used to character
Externí odkaz:
https://doaj.org/article/425b5a77e17747ec963f39c582a4751b
Autor:
Ralitsa Velinova, Anton Naydenov, Diana Kichukova, Ventsislav Tumbalev, Genoveva Atanasova, Daniela Kovacheva, Ivanka Spassova
Publikováno v:
Catalysts, Vol 13, Iss 8, p 1224 (2023)
The work presents Pd-containing catalysts for practical application with enhanced low-temperature activity in the complete oxidation of volatile organic compounds (VOCs) using innovative combinations of reduced graphene oxide (RGO) and alumina. The c
Externí odkaz:
https://doaj.org/article/7a38bcc1976a44d3927f1e9646bafe0e
Autor:
Bozhidar Grahovski, Ralitsa Velinova, Pavletta Shestakova, Anton Naydenov, Hristo Kolev, Iliyana Yordanova, Georgi Ivanov, Krasimir Tenchev, Silviya Todorova
Publikováno v:
Catalysts, Vol 13, Iss 5, p 834 (2023)
The zeolites ZSM-5 with different Si/Al ratios were modified with a buffer solution of HF and NH4F. This acidic treatment led to the obtaining of a material with secondary mesoporosity. The deposition of cobalt from an aqueous solution of cobalt acet
Externí odkaz:
https://doaj.org/article/9e0433b00b7b4a0d991b478a047f9303
Autor:
Vencislav Tumbalev, Daniela Kovacheva, Ivanka Spassova, Ralitsa Velinova, Georgi Tyuliev, Nikolay Velinov, Anton Naydenov
Publikováno v:
Nanomaterials, Vol 12, Iss 21, p 3900 (2022)
The present paper reports on MnCoFeO4 spinels with peculiar composition and their catalytic behavior in the reactions of complete oxidation of hydrocarbons. The samples were synthesized by solution combustion method with sucrose and citric acid as fu
Externí odkaz:
https://doaj.org/article/80bdc377d2294cfd8dc0d5529a5c5c45
Autor:
Anton Naydenov, Ralitsa Velinova, Jean-Luc Blin, Laure Michelin, Bénédicte Lebeau, Hristo Kolev, Yordanka Karakirova, Daniela Karashanova, Loïc Vidal, Anna Dotzeva, Krasimir Tenchev, Silviya Todorova
Publikováno v:
Catalysts, Vol 12, Iss 6, p 583 (2022)
A propane combustion catalyst based on Mn and Ce and supported by SBA-15 was prepared by the “two-solvents” method aiming at the possible application in catalytic converters for abatement of alkanes in waste (exhaust) gases. The catalyst characte
Externí odkaz:
https://doaj.org/article/fda220dd09ad43268e3e433ae496f643
Autor:
Jean-Luc Blin, Laure Michelin, Bénédicte Lebeau, Anton Naydenov, Ralitsa Velinova, Hristo Kolev, Pierrick Gaudin, Loïc Vidal, Anna Dotzeva, Krasimir Tenchev, Silviya Todorova
Publikováno v:
Catalysts, Vol 11, Iss 3, p 366 (2021)
Reported here are new data on the structural and catalytic properties of a series of mono-component cobalt and bi-component Co–Ce catalysts supported on SBA-15 (Santa Barbara Amorphous-15)). The catalysts performance has been evaluated by tests on
Externí odkaz:
https://doaj.org/article/6052a3265faa44789416bacabd660d4a
Pt and Bimetallic Pt—Cu Nanoparticles Supported on Mordenite as Catalysts for Complete VOC Oxidation
Autor:
Yuri Kalvachev, Totka Todorova, Ralitsa Velinova, Petya Petrova, Hristo Kolev, Anton Naydenov
Publikováno v:
Heterogeneous Nanocatalysis for Energy and Environmental Sustainability. :1-16
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3540d93f197939dfca297d0826db5bfe
https://doi.org/10.1002/9781119772057.ch14
https://doi.org/10.1002/9781119772057.ch14
Autor:
Ralitsa Velinova, Bozhidar Grahovski, Hristo Kolev, Georgi Ivanov, Silviya Todorova, Anton Naydenov
Publikováno v:
Materials Today: Proceedings. 61:1255-1259
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::58e93dc564cf85fa8dae6e2ebad176ea
https://doi.org/10.1016/j.matpr.2022.02.360
https://doi.org/10.1016/j.matpr.2022.02.360
Autor:
S. Todorova, Alexander V. Larin, Ralitsa Velinova, Diana Nihtianova, Pavel Markov, Anton Naydenov, M. Shipochka, Boris Drenchev, Daniela Kovacheva, Georgi Ivanov
Publikováno v:
Chemical Engineering Journal. 368:865-876
New and complex results on catalytic activity, thermal stability, effect of H2O and SO2 on the Pd/La2O3-CeO2-Al2O3 model system in methane combustion have been obtained. The catalyst characterization has been made by N2- physisorption, XRD, SEM/EDX,
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ff79adcb7c37ab223d3d05ecb1c1d62a
https://doi.org/10.1016/j.cej.2019.03.017
https://doi.org/10.1016/j.cej.2019.03.017
Autor:
Ralitsa Velinova, Maya Shopska, S. Todorova, K. Tenchev, Hristo Kolev, Alexander V. Larin, Plamen Stefanov, D. Stoyanova, Anton Naydenov
Publikováno v:
Reaction Kinetics, Mechanisms and Catalysis. 126:663-678
Two series of Pd–MeOx/Al2O3 (Me = Co, La, Ce) catalysts were prepared and tested in reaction of methane combustion. The first series comprises the samples obtained by impregnation of γ-Al2O3 with the corresponding salts of La and Ce and additional
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::18a80774eecf3002803d4d0d880bee77
https://doi.org/10.1007/s11144-018-1523-9
https://doi.org/10.1007/s11144-018-1523-9