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000255745 020__ $$a978-3-95806-081-4
000255745 037__ $$aFZJ-2015-05859
000255745 041__ $$aEnglish
000255745 1001_ $$0P:(DE-Juel1)145147$$aWu, Guixuan$$b0$$eCorresponding author$$ufzj
000255745 245__ $$aModelling and Experimental Validation of the Viscosity of Liquid Phases in Oxide Systems Relevant to Fuel Slags$$f- 2015-02-28
000255745 260__ $$aJülich$$bForschungszentrum Jülich GmbH Zentralbibliothek, Verlag$$c2015
000255745 300__ $$aXVI, 170 S.
000255745 3367_ $$0PUB:(DE-HGF)11$$2PUB:(DE-HGF)$$aDissertation / PhD Thesis$$bphd$$mphd$$s1446034128_12114
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000255745 3367_ $$02$$2EndNote$$aThesis
000255745 3367_ $$2DRIVER$$adoctoralThesis
000255745 3367_ $$2BibTeX$$aPHDTHESIS
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000255745 3367_ $$2ORCID$$aDISSERTATION
000255745 4900_ $$aSchriften des Forschungszentrums Jülich Reihe Energie & Umwelt / Energy & Environment$$v282
000255745 502__ $$aRWTH Aachen, Diss., 2015$$bDr.$$cRWTH Aachen$$d2015
000255745 520__ $$aFlexibility in feedstocks and products is one of the most important advantages of an IGCC power plant based on entrained-flow gasifiers. Moreover, it can be combined with the carbon capture and storage (CCS), which is a promising solution to control the CO$_{2}$ emissions produced from the use of fossil fuels such as coal. The core of an IGCC power plant is the slagging gasifier, whose performance is significant for an IGCC power plant. In slagging gasifiers, the majority of the inorganic components are converted to a liquid slag flowing down the wall of the gasifier, whereas the remaining inorganic components entrained in the syngas form fly ash. Slag viscosity plays a very important role in determining the optimum operating conditions for slagging gasification, in which many processes are related to the viscosity, such as the particle sticking (or droplet sticking), slag flow, slag tapping, and refractory degradation that may lead to concerns about efficiency, process reliability, and safety. Slag viscosity is also identified as a critical property for simulations based on computational fluid dynamics (CFD). However, most of the early viscosity models are only capable of describing the viscosity over a limited range of temperatures and compositions, due to the lack of an effective description about the structural dependence of viscosity. This study aims at developing a new viscosity model for fully liquid slag systems in the Newtonian range. In the new viscosity model, the structure of slag is effectively taken into account, in which the viscosity is linked to the type and distribution of species, as well as the connectivity of species. The type of species is determined from the Gibbs energy, and thereby the distribution of species is calculated by using a completely selfconsistent thermodynamic dataset, where the modified associate species model was applied for the slag. This dataset provides the phase diagram and other thermodynamic properties to be calculated in good agreement with the experimental data. In consequence, both the temperature- and composition-induced structural changes of molten fuel slags can be described with a set of monomeric associate species in combination with the critical clusters induced by the self- and inter-polymerizations.[...]
000255745 536__ $$0G:(DE-HGF)POF3-111$$a111 - Efficient and Flexible Power Plants (POF3-111)$$cPOF3-111$$fPOF III$$x0
000255745 536__ $$0G:(DE-Juel1)HITEC-20170406$$aHITEC - Helmholtz Interdisciplinary Doctoral Training in Energy and Climate Research (HITEC) (HITEC-20170406)$$cHITEC-20170406$$x1
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