National Repository of Grey Literature 27 records found  beginprevious13 - 22next  jump to record: Search took 0.01 seconds. 
Effect of Precursor Synthesis on Catalytic Activity of Co3O4 in N2O Decomposition
Chromčáková, Ž. ; Obalová, L. ; Kovanda, F. ; Pacultová, K. ; Kukutschová, J. ; Michalik, S. ; Kustrowski, P. ; Jirátová, Květa
The correlation between methods of preparation, phase composition of precursors, catalytic properties of the related oxide catalysts, and the role of the cobalt ions as catalytic active sites is discussed.
Fulltext: content.csg - Download fulltextPDF
Plný tet: SKMBT_C22014090213370 - Download fulltextPDF
New Catalyst for Removal of N2O from Nitric Acid Plant Tail Gases
Obalová, L. ; Kovanda, F. ; Jirátová, Květa ; Šrámek, J. ; Karásková, K. ; Chromčáková, Ž. ; Borovec, K. ; Dej, M.
In the present work, the Co-Mn-Al mixed oxide modified by K was prepared in the pilot plant scale for the first time and tested in real conditions. Result of N2O catalytic decomposition in the pilot plant reactor installed at the bypassed tail gas from the nitric production plant are shown and obtained kinetic datae used for modelling of full scale reactor for N2O emissions abatement.
Fulltext: content.csg - Download fulltextPDF
Plný tet: SKMBT_C22014050212451 - Download fulltextPDF
Sol-Gel Derived Au-Enriched TiO2 and TiO2-ZrO2 Photocatalysts and Their Examination in Photocatalytic Reduction of Carbon Dioxide
Matějová, Lenka ; Reli, M. ; Čapek, L. ; Matějka, V. ; Šolcová, Olga ; Obalová, L. ; Kočí, K.
Considering the aspects of preparation of gold-based photocatalysts and gold photocatalysis, it is worth a mention that it is more complicated issue than in the case of other noble metals due to the gold crystallinity. In this contribution some critical aspects of the gold photocatalysis will be discussed. Au-supported TiO2 and TiO2-ZrO2 photocatalysts and their pristine counterparts were prepared by using the sol-gel process controlled within reverse micelles environment and by impregnation under vacuum. All photocatalysts were characterized by OEA, ICP/MS, N2 physisorption, XRD, TEM/SEAD and UV-Vis. The performance of laboratory-prepared photocatalysts was examined in CO2 photocatalytic reduction and was compared with the catalytic performance of commercial TiO2 Evonic P25. Logically, the determined physicochemical and optical properties of photocatalysts were correlated with their catalytic performance and some interesting aspects of gold photocatalysis were revealed.
Fulltext: content.csg - Download fulltextPDF
Plný tet: SKMBT_C22013080910510 - Download fulltextPDF
Alkali Metals as Promoters in Co-Mn-Al Mixed Oxide for N2O Decomposition
Obalová, L. ; Karásková, K. ; Wach, A. ; Kustrowski, P. ; Michalik, S. ; Jirátová, Květa
The aim of presented contribution is evaluated of alkali metals promoter effect in Co-Mn-Al mixed oxide (molar ratio Co:Mn:Al=4:1:1) one the low temperature N2O catalytic decomposition.
Fulltext: content.csg - Download fulltextPDF
Plný tet: SKMBT_C22012110811242 - Download fulltextPDF
Optimized Doped Titania for Photocatalysis Applications
Krejčíková, Simona ; Kočí, K. ; Obalová, L. ; Čapek, L. ; Šolcová, Olga
This study is focused on preparation and characterization of the specially designed TIO2 and its modified versions (doped by metal) suitable for photodegradations of organic pollutants.
Fulltext: Download fulltextPDF
Užití kalcinovaných LDH jako katalyzátorů pro odstranění emisí N2O
Obalová, L. ; Kovanda, F. ; Jirátová, Květa ; Pacultová, K. ; Lacný, Z.
Mixed oxide catalysts were prepared by calcination of LDH containing as divalent ions Ni, Co, Cu and /or Mg and as trivalent ions Mn, Fe and/or Al. The highest conversion was reached over Ni-Al and Co-Mn-Al mixed oxides. N2O conversion decreased slightly with the presence of NO2 over Co-Mn-Al catalyst, but strongly over Ni-Al catalyst. Water vapor inhibited the N2O decomposition over all tested catalysts.
Vliv velikosti krystalitů TiO2 na jeho fotokatalytickou reaktivitu
Kočí, K. ; Obalová, L. ; Matějová, Lenka ; Šolcová, Olga ; Plachá, D. ; Lacný, Z.
The aim of this work is to assess the effect of particle size on photocatalytic reactivity of TiO2 exemplified by the photoreduction of CO2 by water. As the particle size decreased higher methane yields over the TiO2 nanoparticles under the illumination of the light were obtained. Results were compared with yields of mathane over Degussa P25, which in non-porous. We demonstrated that photoreactivity of Degussa P25 was lower than all tested TiO2 nanoparticles.
Vliv alkalických kovů v kalcinovaném Co-Mn-Al LDH na katalytický rozklad N2O.
Obalová, L. ; Jirátová, Květa ; Kovanda, F. ; Galejová, K. ; Pacultová, K.
The effect of various amounts of potassium in Co-Mn-Al spinel catalyst on N2O decompositon was examined. Different catalytic performance of samples with different amount of K in th epresence of H2O and NOx could be related to changes in acidity and basicity of catalyst surface.
N2O Decomposition over Promoted Mixed Oxide Catalysts.
Galejová, K. ; Obalová, L. ; Pacultová, K. ; Lacný, Z. ; Kovanda, F. ; Jirátová, Květa
Mixed oxide Co-Mn-Al catalysts were promotes by metals Pd, Pt, La, K and Ce. In simulated proces conditions (in the presence of O2, NO, NO2, H2O) catalytic activity, as well as thein regeneration was studied. The most active catalyst is that one with 3 wt. % K.

National Repository of Grey Literature : 27 records found   beginprevious13 - 22next  jump to record:
Interested in being notified about new results for this query?
Subscribe to the RSS feed.