About: Thermodynamic Possibilities of Pure Hydrogen Production by Chromium, Nickel and Manganese-Based Chemical Looping at Lower Temperatures

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Description	Thermodynamics and chemical equilibrium for reduction of Cr2O3 , Mn3O4 and NiO by hydrogen, carbon monoxide, model syngas and methane and for oxidation of the relevant Cr, MnO and Ni by steam has been studied in a temperature range 400 – 1000 K. Attention was concentrated also on possible formation of undesired soot, carbides and carbonates during reduction step leading to CO and CO2 formation in the steam oxidation step. Reduction of Cr2O3 and MnO to metallic Cr and Mn by hydrogen, CO or CH4 at temperatures 400 – 1000 K is thermodynamically excluded. Reduction of Mn3O4 and NiO by hydrogen, CO and CH4 at such lower temperatures is thermodynamically favourable. Thermodynamics and chemical equilibrium for reduction of Cr2O3 , Mn3O4 and NiO by hydrogen, carbon monoxide, model syngas and methane and for oxidation of the relevant Cr, MnO and Ni by steam has been studied in a temperature range 400 – 1000 K. Attention was concentrated also on possible formation of undesired soot, carbides and carbonates during reduction step leading to CO and CO2 formation in the steam oxidation step. Reduction of Cr2O3 and MnO to metallic Cr and Mn by hydrogen, CO or CH4 at temperatures 400 – 1000 K is thermodynamically excluded. Reduction of Mn3O4 and NiO by hydrogen, CO and CH4 at such lower temperatures is thermodynamically favourable. (en) V rozmezí teplot 400 – 1000 K byly studovány termodynamika a chemické rovnováhy pro redukci Cr2O3 , Mn3O4 a NiO vodíkem , CO, syntetickým plynem, metanem a pro oxidaci relevantních produktů Cr, MnO a Ni vodní parou. Pozornost byla soustředěna také na možnou tvorbu nežádoucích sazí, karbidů a uhličitanů během redukčního kroku, které vedouc následně k uvolňování CO a CO2 v oxidačním kroku. Redukce Cr2O3 a MnO na kovový chrom a mangan pomocí vodíku, CO nebo metanu je vyloučena za teplot 400 – 1000 K. Redukce Mn3O4 a NiO vodíkem, CO a CH4 za těchto nižších teplot je termodynamicky preferována. (cs)
Title	Thermodynamic Possibilities of Pure Hydrogen Production by Chromium, Nickel and Manganese-Based Chemical Looping at Lower Temperatures Thermodynamic Possibilities of Pure Hydrogen Production by Chromium, Nickel and Manganese-Based Chemical Looping at Lower Temperatures (en) Termodynamické možnosti a omezení pro výrobu čistého vodíku pomocí chromu, manganu a niklu s využitím cyklického chemického procesu za nižších teplot (cs)
skos:prefLabel	Thermodynamic Possibilities of Pure Hydrogen Production by Chromium, Nickel and Manganese-Based Chemical Looping at Lower Temperatures Thermodynamic Possibilities of Pure Hydrogen Production by Chromium, Nickel and Manganese-Based Chemical Looping at Lower Temperatures (en) Termodynamické možnosti a omezení pro výrobu čistého vodíku pomocí chromu, manganu a niklu s využitím cyklického chemického procesu za nižších teplot (cs)
skos:notation	RIV/67985858:_____/06:00055250!RIV07-AV0-67985858
http://linked.open.../vavai/riv/strany	1340;1341
http://linked.open...avai/riv/aktivita	Z
http://linked.open...avai/riv/aktivity	Z(AV0Z40720504)
http://linked.open...vai/riv/dodaniDat	2007
http://linked.open...aciTvurceVysledku	Svoboda, Karel
http://linked.open.../riv/druhVysledku	D - Článek ve sborníku
http://linked.open...iv/duvernostUdaju	S - Úplné a pravdivé údaje nepodléhající ochraně podle zvláštních právních předpisů
http://linked.open...titaPredkladatele	Ústav chemických procesů AV ČR, v. v. i.
http://linked.open...dnocenehoVysledku	503790
http://linked.open...ai/riv/idVysledku	RIV/67985858:_____/06:00055250
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	chromium; hydrogen; nickel (en)
http://linked.open.../riv/klicoveSlovo	chromium hydrogen nickel
http://linked.open...ontrolniKodProRIV	[9006EDAF34AE]
http://linked.open...v/mistoKonaniAkce	p
http://linked.open...i/riv/mistoVydani	Praha
http://linked.open...i/riv/nazevZdroje	Summaries 4.
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http://linked.open...ichTvurcuVysledku	1 (xsd:int)
http://linked.open...cetTvurcuVysledku	3 (xsd:int)
http://linked.open...UplatneniVysledku	2006
http://linked.open...iv/tvurceVysledku	Svoboda, Karel Rogut, J. Siewiorek, A.
http://linked.open...vavai/riv/typAkce	EUR - Evropská
http://linked.open.../riv/zahajeniAkce	2006-08-27 (xsd:date)
http://linked.open...n/vavai/riv/zamer	Investigation of multiphase reacting systems for the design of processes important in synthesis and preparation of novel materials, in energy production and in environmental protection
number of pages	34 (xsd:int)
http://purl.org/ne...btex#hasPublisher	Process Engineering Publisher
https://schema.org/isbn	80-86059-45-6
is http://linked.open...avai/riv/vysledek of	Thermodynamic Possibilities of Pure Hydrogen Production by Chromium, Nickel and Manganese-Based Chemical Looping at Lower Temperatures Thermodynamic Possibilities of Pure Hydrogen Production by Chromium, Nickel and Manganese-Based Chemical Looping at Lower Temperatures

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