Entwicklung eines simultanen DeNOx/DeSOx‐Trocken‐Verfahrens in der zirkulierenden Wirbelschicht

Weisweiler, Werner; Herrmann, Erhard; Schmitt, Ralf; Zimmer, Isolde

doi:10.1002/cite.330630319

Cited by 2 publications

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“…Moreover, the CFB is used for dry gas cleaning, e.g. adsorption of H F on A1203 at low temperatures [ l ] or NOx/S02 removal from flue gases [2], for the gasification of wood and biomass and for the reduction of finely grained iron and nickel ores [3]. Advantages of the CFB reactor include high throughput and, essentially, plug flow of gases, temperature uniformity, independently adjustable solids and gas retention times and, possibly, continuous regeneration of the catalyst in the downcomer [4].…”

Section: Introductionmentioning

confidence: 99%

Mass transfer and reaction behaviour of a circulating fluidized bed reactor

Vollert

Werther

1994

Chem Eng & Technol

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This contribution presents a chemical reactor model of a circulating fluidized bed (CFB) which takes into account adsorption effects and provides a description of the vertical profiles of gas concentration in the riser. The oxidation of NO is used as an example of a heterogeneous catalytic reaction. Mass transfer between the gas phase and solid particles in the CFB was investigated at various temperatures and solids mass flow rates. The measurements show that the mass transfer coefficient decreases with increasing solids mass flux and that the CFB resembles a bubbling fluidized bed as regards gas-solid contacting.

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Section: Introductionmentioning

confidence: 99%

Mass transfer and reaction behaviour of a circulating fluidized bed reactor

Vollert

Werther

1994

Chem Eng & Technol

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“…sen [2] wurde im Labor-, Technikums-sowie im Pilotmal3-stab erprobt und zur grol3technischen Reife entwickelt. In diesem DeNOdDeSOx-Simult anverfahren erfolgt die Entschwefelung mit Hilfe der industriell bereits verbreiteten Trockensorption an Ca (OH)2 [3], die Stickoxid-Entfernung durch die selektiv katalysierte Reduktion von NO, zu N2 mit NH3 als Reduktionsmittel (sogenanntes SCRVerfahren).…”

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Die zirkulierende Wirbelschicht als Reaktionssystem für katalysierte Gas/Feststoff‐Reaktionen

Herrmann

Weisweiler

1992

Chemie Ingenieur Technik

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The circulating fluidized bed reactor for catalyzed gaskolid reactions. For many years circulating fluidized beds (CFB) have been successfully employed for a variety of technical applications, e.g. for dry sorption processes to clean waste gases from alumina electrolysis, waste incinerators, and from coal dust combustion. A new application of the CFB principle, the dry and simultaneous removal of nitrogen oxides and sulfur oxides both from power plant and industrial waste gases has been developed and tested in laboratory-scale, bench-scale, and pilot plant facilities and has since reached technical maturity. In this dry DeNOx/DeSOx process, desulfurisation is accomplished by dry sorption with Ca(OH)2 whereas NO, is eliminated by selective catalytic reduction (SCR) with NH3 as reducing agent.To perform the process in a CFB reactor, powder-like DeNOx catalysts are required. Referring to the simultaneous DeNOfleSOx CFB-process, the main features of highly expanded gadsolid reaction systems as well as the requirements for fine catalyst particles used therein are evaluated. First basic results of the simultaneous NO, und SO, removal from firing gases in the CFB will be reported.

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Entwicklung eines simultanen DeNOx/DeSOx‐Trocken‐Verfahrens in der zirkulierenden Wirbelschicht

Abstract: Zirkulierende Wirbelschichten (ZWS) werden heute mit Erfolg zur Calcinierung, zur umweltfreundlichen Kohleverbrennung und zur trockenen Abgasreinigung eingesetzt. Trockenverfahren zur Reinigung von Abgasen aus der Aluminium-Elektrolyse (W, ca.

Cited by 2 publications

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Mass transfer and reaction behaviour of a circulating fluidized bed reactor

Mass transfer and reaction behaviour of a circulating fluidized bed reactor

Die zirkulierende Wirbelschicht als Reaktionssystem für katalysierte Gas/Feststoff‐Reaktionen

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