Agglomeration in fluidised bed gasification of biomass

Fryda, LE; Panopoulos, KD; Kakaras, E

dc.contributor.author	Fryda, LE	en
dc.contributor.author	Panopoulos, KD	en
dc.contributor.author	Kakaras, E	en
dc.date.accessioned	2014-03-01T01:27:50Z
dc.date.available	2014-03-01T01:27:50Z
dc.date.issued	2008	en
dc.identifier.issn	0032-5910	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/18603
dc.subject	fluidised bed	en
dc.subject	agglomeration	en
dc.subject	biomass	en
dc.subject	gasification	en
dc.subject	SEM/EDS	en
dc.subject	FactSAGE (TM)	en
dc.subject.classification	Engineering, Chemical	en
dc.subject.other	ELEVATED-TEMPERATURES	en
dc.subject.other	ALUMINA SAND	en
dc.subject.other	COMBUSTION	en
dc.subject.other	FUELS	en
dc.subject.other	STRAW	en
dc.subject.other	ASHES	en
dc.subject.other	TENDENCIES	en
dc.subject.other	MECHANISMS	en
dc.subject.other	RESIDUES	en
dc.subject.other	COAL	en
dc.title	Agglomeration in fluidised bed gasification of biomass	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/j.powtec.2007.05.022	en
heal.identifier.secondary	http://dx.doi.org/10.1016/j.powtec.2007.05.022	en
heal.language	English	en
heal.publicationDate	2008	en
heal.abstract	Three promising biomass fuels for southern Mediterranean regions were tested for their agglomeration tendency in an atmospheric lab-scale fluidised bed (FB) gasifier using quartz and olivine as bed materials. The defluidisation temperatures of the energy crops Giant Reed (Arundo, donax L.) and Sweet Sorghum bagasse were respectively approx. 790 degrees C and 810 degrees C, in both bed materials, while the agro industrial residue olive bagasse caused defluidisation of the quartz bed at 830 degrees C and olivine bed at >850 degrees C. Agglomerates from these tests were analysed with SEM/EDS. Coatings and necks between bed particles were formed due to ash derived potassium silicate melt. For the first two fuels cluster-type agglomerates around remains of char particles were observed. Thermodynamic equilibrium simulations of each chemical system were performed to cross examine the predicted ash melting temperatures and chemistry with experimental findings. Predictions of potassium liquid compounds, like K2O center dot SiO2(1) were verified by EDS analyses on the particle coatings. FB gasification of olive bagasse resisted defluidisation up to higher temperatures because of its lower potassium and higher calcium content, especially in the case of olivine bed. The latter experimental finding coincided with thermodynamic predictions. (c) 2007 Elsevier B.V. All rights reserved.	en
heal.publisher	ELSEVIER SCIENCE SA	en
heal.journalName	POWDER TECHNOLOGY	en
dc.identifier.doi	10.1016/j.powtec.2007.05.022	en
dc.identifier.isi	ISI:000253747600011	en
dc.identifier.volume	181	en
dc.identifier.issue	3	en
dc.identifier.spage	307	en
dc.identifier.epage	320	en