About: Alkali metals as promoters in Co-Mn-Al mixed oxide for N2O decomposition

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About: Alkali metals as promoters in Co-Mn-Al mixed oxide for N2O decomposition Goto Sponge NotDistinct Permalink

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
Description	Alkali promoted Co4MnAlOx mixed oxide (molar ratio of alkali metal/Co = 0.037) were prepared by impregnation of calcined Co–Mn–Al hydrotalcite (molar ratio Co:Mn:Al = 4:1:1) with an aqueous solution of Li, Na, K, Rb or Cs nitrate. The catalysts were characterized by AAS, SEM/EDX, N2 physisorption, XRPD, XPS, H2-TPR, TPD of CO2 and NH3 and tested for N2O decomposition in inert gas and simulated waste gas from HNO3 production. N2O conversion over alkali promoted Co4MnAlOx mixed oxide decreased in order Cs > Rb > K > Na = Co4MnAlOx > Li in inert gas and was shifted to the lower values in the presence of typical components (NOx, O2 and H2O) of flue gas. The addition of alkali promoters to the Co4MnAlOx mixed oxide resulted in a modification of both electronic properties of active metals and acid–base function of the catalyst surface. The promotional effect of alkali metals is connected with their ionization potential, the charge transfer to the catalyst and a decrease in binding energies of all catalyst components (Co, Mn, Al and O). Pilot plant verification of N2O decomposition over K-promoted Co4MnAlOx is shown. Alkali promoted Co4MnAlOx mixed oxide (molar ratio of alkali metal/Co = 0.037) were prepared by impregnation of calcined Co–Mn–Al hydrotalcite (molar ratio Co:Mn:Al = 4:1:1) with an aqueous solution of Li, Na, K, Rb or Cs nitrate. The catalysts were characterized by AAS, SEM/EDX, N2 physisorption, XRPD, XPS, H2-TPR, TPD of CO2 and NH3 and tested for N2O decomposition in inert gas and simulated waste gas from HNO3 production. N2O conversion over alkali promoted Co4MnAlOx mixed oxide decreased in order Cs > Rb > K > Na = Co4MnAlOx > Li in inert gas and was shifted to the lower values in the presence of typical components (NOx, O2 and H2O) of flue gas. The addition of alkali promoters to the Co4MnAlOx mixed oxide resulted in a modification of both electronic properties of active metals and acid–base function of the catalyst surface. The promotional effect of alkali metals is connected with their ionization potential, the charge transfer to the catalyst and a decrease in binding energies of all catalyst components (Co, Mn, Al and O). Pilot plant verification of N2O decomposition over K-promoted Co4MnAlOx is shown. (en)
Title	Alkali metals as promoters in Co-Mn-Al mixed oxide for N2O decomposition Alkali metals as promoters in Co-Mn-Al mixed oxide for N2O decomposition (en)
skos:prefLabel	Alkali metals as promoters in Co-Mn-Al mixed oxide for N2O decomposition Alkali metals as promoters in Co-Mn-Al mixed oxide for N2O decomposition (en)
skos:notation	RIV/61989100:27360/13:86088304!RIV14-TA0-27360___
http://linked.open...avai/riv/aktivita	I P S
http://linked.open...avai/riv/aktivity	I, P(ED2.1.00/03.0100), P(TA01020336), S
http://linked.open...iv/cisloPeriodika	10.7.2013
http://linked.open...vai/riv/dodaniDat	2014
http://linked.open...aciTvurceVysledku	Karásková, Kateřina
http://linked.open.../riv/druhVysledku	J - Článek v odborném periodiku
http://linked.open...iv/duvernostUdaju	S - Úplné a pravdivé údaje nepodléhající ochraně podle zvláštních právních předpisů
http://linked.open...titaPredkladatele	Vysoká škola báňská - Technická univerzita Ostrava / Fakulta metalurgie a materiálového inženýrství
http://linked.open...dnocenehoVysledku	60097
http://linked.open...ai/riv/idVysledku	RIV/61989100:27360/13:86088304
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	Layered double hydroxide; Cobalt oxide; Promoter; Alkali metal; N2O decomposition (en)
http://linked.open.../riv/klicoveSlovo	Layered double hydroxide Alkali metal Cobalt oxide Promoter N2O decomposition
http://linked.open...odStatuVydavatele	NL - Nizozemsko
http://linked.open...ontrolniKodProRIV	[FDA454E80BE0]
http://linked.open...i/riv/nazevZdroje	Applied Catalysis A: General
http://linked.open...in/vavai/riv/obor	CI
http://linked.open...ichTvurcuVysledku	1 (xsd:int)
http://linked.open...cetTvurcuVysledku	7 (xsd:int)
http://linked.open...vavai/riv/projekt	Institute of environmental technologies Abatement of N2O emissions from waste gas of nitric acid production
http://linked.open...UplatneniVysledku	2013
http://linked.open...v/svazekPeriodika	462
http://linked.open...iv/tvurceVysledku	Jirátová, Květuše Karásková, Kateřina Obalová, Lucie Mamulová Kutláková, Kateřina Kustrowski, Piotr Michalik, Svatopluk Wach, Anna
http://linked.open...ain/vavai/riv/wos	000323018700027
issn	0926-860X
number of pages	9 (xsd:int)
http://bibframe.org/vocab/doi	10.1016/j.apcata.2013.05.011
http://localhost/t...ganizacniJednotka	27360

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