Coal combustion with simulated gas turbine exhaust gas and catalytic oxidation of the unburnt fuel

Kakaras, E; Vourliotis, P

dc.contributor.author	Kakaras, E	en
dc.contributor.author	Vourliotis, P	en
dc.date.accessioned	2014-03-01T01:13:37Z
dc.date.available	2014-03-01T01:13:37Z
dc.date.issued	1998	en
dc.identifier.issn	0016-2361	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/12620
dc.subject	Catalytic oxidation	en
dc.subject	Coal combustion	en
dc.subject	Combined cycle	en
dc.subject.classification	Energy & Fuels	en
dc.subject.classification	Engineering, Chemical	en
dc.subject.other	Carbon monoxide	en
dc.subject.other	Catalysis	en
dc.subject.other	Exhaust gases	en
dc.subject.other	Fluidized bed combustion	en
dc.subject.other	Gas turbines	en
dc.subject.other	Hydrocarbons	en
dc.subject.other	Oxidation	en
dc.subject.other	Catalytic oxidation	en
dc.subject.other	Combined cycle	en
dc.subject.other	Coal combustion	en
dc.title	Coal combustion with simulated gas turbine exhaust gas and catalytic oxidation of the unburnt fuel	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/S0016-2361(98)00043-X	en
heal.identifier.secondary	http://dx.doi.org/10.1016/S0016-2361(98)00043-X	en
heal.language	English	en
heal.publicationDate	1998	en
heal.abstract	One method of improving the overall efficiency of a power plant or increasing the power output is to re-power the existing boilers, using gas turbines in a combined cycle system. For the case of coal-fired plants, this option known as gas turbine topping is limited by the difficulties in coal burnout due to the low oxygen content (12 vol%) in the exhaust gas of modem gas turbines. A possible option to resolve the problem could be the introduction of an oxidation catalyst in order, first, to avoid the incomplete combustion of the coal and, second, to decrease the CO and CxHy emissions. This paper presents the results of coal combustion tests in an existing atmospheric fluidized bed with simulated gas turbine exhaust flue gas. The purposes of the trials were the examination of the possibility to achieve the combustion of low-grade lignite with about 12-14 vol% O-2 content in the turbine exhaust gas and the experimental investigation of the catalytic oxidation on the burnout behaviour as well as the resulting CO, SO2, N2O, CxHy and NOx emissions. Two series of measurements were carried out, with and without catalysts. The influence of the catalysts on the burnout of coal and the combustion temperature is examined and discussed. The main conclusion of this experimental investigation is that it is possible to achieve combustion of the low-grade lignite in combined cycle applications, using turbine exhaust gas as a fluidizing and oxidant medium with the support of the catalysts examined in this study, as is shown by the drastic reduction of CO and CxHy emissions. (C) 1998 Elsevier Science Ltd. All rights reserved.	en
heal.publisher	ELSEVIER SCI LTD	en
heal.journalName	Fuel	en
dc.identifier.doi	10.1016/S0016-2361(98)00043-X	en
dc.identifier.isi	ISI:000075117700013	en
dc.identifier.volume	77	en
dc.identifier.issue	12	en
dc.identifier.spage	1357	en
dc.identifier.epage	1365	en