ATAC i system - Energimyndigheten

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Appendix. Principschema för Chemical Looping Combustion N 2, O 2 Air reactor Air MeO (+ Me) Me (+ MeO) CO 2, H 2O Fuel reactor Fig. 1. Tvåstegsförbränning med chemical-looping combustion. MeO/Me betecknar partiklar som består av en mer eller mindre oxiderad metall. (En fullständig omvandling mellan metalloxid och metall behövs inte.) 1 air 2 3 flue gas H O 2 fuel noncondensible gas bleed Fig. 2. Chemical-looping combustion med två hopkopplade fluidiserade bäddar som partiklarna cirkulerar mellan. 1 luftreaktor; 2) cyklon; 3) bränslereaktor Fuel CO2
Katalytisk förbränning av förgasat biobränsle i gasturbiner - Catalytic Combustion of Gasified Biomass in Gas Turbines Projekt nr: P7057-4 Projektledare: Prof. Torsten Fransson Projektdeltagare: Jürgen Jacoby (100%), Philippe Thevenin (50%), Jan Fredriksson (10%) Projektets varaktighet: 2000-04-01 till 2002-03-31 Beviljade medel: 3 530 000 kr Referensgrupp: Rolf Gabrielsson (VAC), Lars Waldheim (TPS), Magnus Callavik (ABB Corp. Research), Sven Järås (Kemisk Tekonologi-KTH) ___________________________________________________________________________ Projektbeskrivning (Project description): This project attempts to combine two technologies in the field of energy production, which have experienced an increasing interest in research, namely gasified biomass and catalytic combustion. Catalytic combustion has been investigated by numerous research groups in both academic and commercial fields as it offers high efficiency combustion at low emission levels, a feature which has become essential to meet today’s stringent emission regulations. Single-digit emissions levels of nitrogen oxides, carbon monoxides and unburnt hydrocarbons have already been demonstrated using natural gas as a fuel source. Gasified biomass offers the potential for reducing net emissions of carbon dioxide as a greenhouse gas. A reduction of nitrogen oxides as a combustion product is of interest as its oxidation in the earth atmosphere results in the formation of secondary pollutants which are potentially more harmful than the precursor itself. The purpose of the catalyst is to allow a stable reaction process of lean fuelto-air mixtures. Biomass is an attractive fuel source due to its abundance. It has to be said though that this statement is only valid in certain geographical regions of the world. Through advanced gasification technologies, e.g. the circulating fluidized bed technology, biomass can be converted into a combustible gas which can in turn be used to fire a gas turbine for energy production. Gasified biomass has some distinct characteristics resulting in great demands on the combustor. Even though rich in hydrogen and carbon monoxide, its low-heating value requires a technique to maintain a stable combustion, difficult to achieve via flame combustion. Furthermore it has a potentially high level of ammonia, which may generate emissions of nitrogen oxide. Projektets mål (Project goal): Overall aim of the project is to investigate the feasibility of firing a gas turbine which is equipped with a catalytic combustion chamber with a low-heating value fuel derived from gasification of biomass, e.g. wood chips. Monitoring of the emission levels is essential in order to meet the required standards. Jürgen Jacoby defended his Ph.D. thesis on Oct 25 th , 2001, preliminary date for the disputation of Philippe Thevenin is April 2002. Uppnådda resultat (Results): A test facility for studying the catalytic combustion of a gas similar in its characteristics to gasified biomass has been designed and successfully taken into service. The tested catalyst arrangements and catalyst properties are listed in Table 1.
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ATAC i system Projekt nr: P10025 -
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I Figur 2 visas ett exempel där 10
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Termodynamiska data för luft-vatte
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2002-02-22 liquid components were a
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Dimensionering av befuktare för ev
Page 11 and 12: Slutsatser. Utfall i relation till
Page 13 and 14: Rekuperatorer för Gasturbinanlägg
Page 15 and 16: Blomgren) har skett här och viss a
Page 17 and 18: Expertsystem baserat på ANN: Metod
Page 21 and 22: med en vanlig luftpump (cykel, bil)
Page 23 and 24: Biobränslebaserad småskalig kraft
Page 25 and 26: These findings together with the di
Page 27 and 28: stirlingmotorer för andra ändamå
Page 29 and 30: Projektets mål (Project goal): Fö
Page 31 and 32: Analys och optimering av avancerade
Page 33 and 34: Biomass and Natural Gas. Increased
Page 35 and 36: cycles, repowering of old steam uni
Page 37 and 38: Systemstudier av kraftcykler med Ch
Page 39 and 40: compensated by the steam cycle. The
Page 41 and 42: Development of tools for the design
Page 43 and 44: High Pressure Catalytic Combustion
Page 45 and 46: combustion catalysts. The incipient
Page 47 and 48: Project goal: The overall objective
Page 49 and 50: pressure ratio of 2.7. Above a pres
Page 51 and 52: Förbränning för koldioxidfria pr
Page 53 and 54: 3 candidate, the measurement strate
Page 55 and 56: Dynamisk processimulering för opti
Page 59 and 60: Nedan anges viktiga delmål, dvs de
Page 61: Behov av fortsatta forskningsarbete
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ATAC i system - Energimyndigheten

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