Thermodynamic equilibrium calculation to evaluate influence of alumina-silicate based additives on slagging and fouling tendencies of biomass fuels

Πολυζώης, Ιωάννης; Polyzois, Ioannis

dc.contributor.author	Πολυζώης, Ιωάννης	el
dc.contributor.author	Polyzois, Ioannis	el
dc.date.accessioned	2015-11-27T10:58:46Z
dc.date.available	2015-11-27T10:58:46Z
dc.date.issued	2015-11-27
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/41684
dc.identifier.uri	http://dx.doi.org/10.26240/heal.ntua.10934
dc.rights	Default License
dc.subject	Biomass	en
dc.subject	Βιομάζα	el
dc.subject	Fact sage	en
dc.subject	Additive	en
dc.subject	Slagging	en
dc.subject	Fouling	en
dc.subject	Equilibrium calculation	en
dc.subject	Πρόσθετα	el
dc.subject	Επικαθίσεις	el
dc.subject	Θρόμβωση	el
dc.subject	Υπολογισμός	el
dc.subject	Κατάσταση ισορροπίας	el
dc.title	Thermodynamic equilibrium calculation to evaluate influence of alumina-silicate based additives on slagging and fouling tendencies of biomass fuels	en
heal.type	bachelorThesis
heal.secondaryTitle	Θερμοδυναμικός υπολογισμός σε κατάσταση ισορροπίας για την αξιολόγηση της επίδρασης των πρόσθετων Πυριτικού Αργιλίου στην τάση προς δημιουργία επικαθίσεων και θρόμβωσης της βιομάζας	el
heal.classification	Μηχανολογία	el
heal.classification	Χημική μηχανική	el
heal.classification	Mechanical engineering	en
heal.classification	Chemical engineering	el
heal.language	en
heal.access	free
heal.recordProvider	ntua	el
heal.publicationDate	2015-07-09
heal.abstract	In the present study, thermodynamic equilibrium calculations were performed using the thermochemical software and database ‘FactSage 6.3’ in order to simulate the slagging ten-dency and ash behaviour of Torrefied Straw and Wood Pellets and the effect of alumina-silicate based additives. Moreover, experiments took place in the 20kWth atmospheric drop tube furnace of the IFK facility, in order to investigate the impact of varying amount of addi-tives in the behaviour of biomass Cl. The equilibrium results show that the slagging behav-iour of biomass is led primarily by its high K content. Biomass slag ratio increases with in-creasing temperatures and low air to fuel ratios. The increase is very sharp for temperatures over the fluid temperature of biomass ash. Kaolinite was shown to reduce the formation of slag and lead Cl out of KCl. The experimental results show that the use of varying amount of alumina-silicate based additives does have a fast impact which is perceived through the quick changes of HCl concentrations in the flue gas. As the additive feeding increases, so does the amount of chlorine that gets out of KCl and thus the HCl concentrations increase as well. In addition, the molar ratio of K/(Al+Si) is shown to influence the amount of Cl that forms into HCl. The use of additive restrained Cl from going to KCl and consequently was also pre-vented from ash. The equilibrium and experimental results are close, especially for higher additive input into the system.	en
heal.advisorName	Paneru, Manoj	en
heal.committeeMemberName	Scheffknecht, Günter	de
heal.committeeMemberName	Καρέλλας, Σωτήριος	el
heal.academicPublisher	Εθνικό Μετσόβιο Πολυτεχνείο. Σχολή Μηχανολόγων Μηχανικών. Τομέας Θερμότητας. Εργαστήριο Ατμοκινητήρων και Λεβήτων	el
heal.academicPublisherID	ntua
heal.numberOfPages	151 σ.
heal.fullTextAvailability	true