National Repository of Grey Literature 48 records found  beginprevious30 - 39next  jump to record: Search took 0.00 seconds. 
Vlastnosti, aktivita a selektivita kalcinovaných Co(Mg)Al(Mn prelurzorů typu hydrotalcitu při totální oxidaci VOC.
Mikulová, Zuzana ; Jirátová, Květa ; Kovanda, F. ; Balabánová, Jana ; Bastl, Zdeněk
The effect of various Co:Mg:Mn:Al molar ratios (MII/MIII being 2) on physical-chemical properties of resulting calcined catalysts was studied and on thein aktivity and selektivity in total oxidation of toluene and ethanol.
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.
Catalytic Reduction of N2O Emissions.
Obalová, L. ; Kovanda, F. ; Jirátová, Květa ; Pacultová, K.
Effect of mixed oxides prepared by decomposition of hydrotalcite precursors was studied in decomposition of N2O. In simulated proces conditions (presence of O2, NO, NO2, H2O) their activity and long-term stability was examined. The most active catalyst was that with 3 wt. % K.
Catalytic Methods in Decrease of N2O Emissions: II. Catalysts Based on Hydrotalcites – Results of Investigation.
Pacultová, K. ; Obalová, L. ; Kovanda, F. ; Jirátová, Květa ; Lacný, Z. ; Valášková, M.
Activity of the two- and three component catalysts prepared by calcinations of Ni, Cu, Co, Mn, Mg, Al hydrotalcites in various molar ratios, partly modified with Pt, Pd, La, or K, was studied. Influence of O2, NOx, or H2O present in the reaction mixture on activity and stability of the most active catalyst was also investigated. Based on the laboratory results the size of a hypothetical industrial reactor was calculated.
Účinnost destrukce N2O v přítomnosti CO na směsných oxidických Co-Mn-Al katalyzátorech odvozených z Co-Mn-Al hydrotalcitů.
Pacultová, K. ; Obalová, L. ; Jirátová, Květa ; Kovanda, F.
Presence of CO showed a positive effect on the N2O destruction over mixed metal oxide catalyst derived from Co-Mn-Al hydrotalcite precursors, as it can remove the adsorbed oxygen on the catalyst surface. Vice versa presence of oxygen in the reaction mixture has negative effect.
Modifikace NiMgMn směsných oxidů vzácnými kovy a jejich fyzikální a katalitické vlastnosti při totální oxidaci VOC
Mikulová, Zuzana ; Balabánová, Jana ; Kovanda, F. ; Jirátová, Květa
The aim of our work is to improve properties of the calcined NiMgMn catalyst by introducing of small amount (0.1%) of noble metals (Pt, Pd, Ag) from different precursors and to reveal their effect on physical-chemical properties and the activity in total oxidation of toluene and ethanol. Four methods were used for NiMgMn catalyst modification with Pt, Pd or Ag (impregnation, impregnation with a reverse microemulsion, ion exchange or noble metal was incorporated into the precursor during coprecipitation).
Kalcinované Co(Mg)Al(Mn) prekursory připravené na bázi hydrotalcitů v totální oxidaci VOC
Mikulová, Zuzana ; Balabánová, Jana ; Kovanda, F. ; Bastl, Zdeněk ; Jirátová, Květa
Total oxidation of VOC proceeding in the presence of oxidation catalysts at relatively low reaction temperature (determined by catalysts activity) is an alternative route to eliminace VOC from air. Hydrotalcites could be promising materiál for oxidation catalysts as they lead, after calcination, to mixed oxides.The aim of our study was to reveal the effect of various Mg:Co:Al:Mn hydrotalcite-like compound molar ratio (MII/MIII being 2) on physical-chemical properties of resulting catalysts and thein aktivity in total oxidation of VOC.
TPR Study of Mixed Oxide Catalysts Derived from Mn-Containing Layered Double Hydroxides
Kociánová, Jana ; Kovanda, F. ; Jirátová, Květa
Posible source of errors appearing during measurements of temperature-programmed reduction was analyzed. TPR measurements enabled us to confirm appearance of various solid phase in the calcined Ni-(Mg)-Mn hydrotalcites in dependence of temperature of calcination.

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2 Kovanda, Filip
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