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@BOOK{Mller:136138,
author = {Müller, Michael},
title = {{F}reisetzung und {E}inbindung von
{A}lkalimetallverbindungen in kohlebefeuerten
{K}ombikraftwerken},
volume = {34},
address = {Jülich},
publisher = {Forschungszentrum Jülich GbmH Zentralbibliothek, Verlag},
reportid = {PreJuSER-136138},
isbn = {978-3-89336-568-0},
series = {Schriften des Forschungszentrums Jülich . Reihe Energie
$\&$ Umwelt / Energy $\&$ Environment},
pages = {155 S.},
year = {2009},
note = {Record converted from JUWEL: 18.07.2013},
abstract = {Coal fired combined cycle power systems will be a
sufficient way to increase the efficiency of coal
combustion. However, combined cycle power systems require a
reliable hot gas cleanup. Especially alkali metals, such as
sodium and potassium, can lead to hot corrosion of the gas
turbine blading if they condensate as sulphates. The actual
work deals with the release and sorption of alkali metals in
coal fired combined cycle power systems. The influence of
coal composition, temperature and pressure on the release of
alkali species in coal combustion was investigated and the
relevant release mechanisms identified. Alumosilicate
sorbents have been found that reduce the alkali
concentration in the hot flue gas of the Circulating
Pressurized Fluidized Bed Combustion 2nd Generation (CPFBC
2$^{nd}$ Gen.) at 750 °C to values sufficient for use in a
gas turbine. Accordingly, alumosilicate sorbents working at
1400 °C have been found for the Pressurized Pulverized Coal
Combustion (PPCC). The sorption mechanisms have been
identified. Thermodynamic calculations were performed to
upscale the results of the laboratory experiments to
conditions prevailing in power systems. According to these
calculations, there is no risk of hot corrosion in both
processes. Furthermore, thermodynamic calculations were
performed to investigate the behaviour of alkali metals in
an IGCC with integrated hot gas cleanup and H2 membrane for
CO$^{2}$ sequestration.},
cin = {IEF-2},
ddc = {333.7},
cid = {I:(DE-Juel1)VDB810},
typ = {PUB:(DE-HGF)3},
url = {https://juser.fz-juelich.de/record/136138},
}