Electrochemical methods for monitoring the volatile pyrolysis products of Pinus halepensis pine-needles

Liodakis, S; Gakis, D; Statheropoulos, M; Tzamtzis, N; Pappa, A

dc.contributor.author	Liodakis, S	en
dc.contributor.author	Gakis, D	en
dc.contributor.author	Statheropoulos, M	en
dc.contributor.author	Tzamtzis, N	en
dc.contributor.author	Pappa, A	en
dc.date.accessioned	2014-03-01T01:12:50Z
dc.date.available	2014-03-01T01:12:50Z
dc.date.issued	1997	en
dc.identifier.issn	0165-2370	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/12260
dc.subject	Electrochemical methods	en
dc.subject	Pinus halepensis pine-needles	en
dc.subject	Pyrolysis	en
dc.subject.classification	Chemistry, Analytical	en
dc.subject.classification	Spectroscopy	en
dc.subject.other	Alcohols	en
dc.subject.other	Aldehydes	en
dc.subject.other	Carboxylic acids	en
dc.subject.other	Electrochemistry	en
dc.subject.other	Flammability	en
dc.subject.other	Gas chromatography	en
dc.subject.other	Heat treatment	en
dc.subject.other	Mass spectrometry	en
dc.subject.other	pH effects	en
dc.subject.other	Plants (botany)	en
dc.subject.other	Redox reactions	en
dc.subject.other	Thermal effects	en
dc.subject.other	Oxidation reduction potentiometry	en
dc.subject.other	Pyrolysis	en
dc.title	Electrochemical methods for monitoring the volatile pyrolysis products of Pinus halepensis pine-needles	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/S0165-2370(97)00061-2	en
heal.identifier.secondary	http://dx.doi.org/10.1016/S0165-2370(97)00061-2	en
heal.language	English	en
heal.publicationDate	1997	en
heal.abstract	Various electrochemical methods such as oxidation-reduction potentiometry, pH-metry and conductometry were used for monitoring the volatile pyrolysis products of Pinus halepensis pine-needles. The study was carried out under non-isothermal conditions (ambient to 400 degrees C) with a heating rate of 10 degrees C min(-1), in nitrogen atmosphere. Products with the lowest redox potential values, such as aldehydes and alcohols, were evolved between 180 and 230 degrees C. Products with the highest conductivity values such as carboxylic acids, were evolved in the temperature range of 240-320 degrees C, whilst those with the lowest pH values, such as phenols and acids were evolved in the temperature range of 220-300 degrees C. The results of this study are in agreement with those obtained previously by DI-MS, Py-GC-FID and Py-GC-MS. The electrochemical methods have the advantage of being simple, fast and low cost methods for monitoring the pyrolysis products. The redox potential value is examined as a measure of the chemical stability (i.e. the reducing properties increase as the redox values decrease) correlated with the flammability of the pyrolysis products. (C) 1997 Elsevier Science B.V.	en
heal.publisher	ELSEVIER SCIENCE BV	en
heal.journalName	Journal of Analytical and Applied Pyrolysis	en
dc.identifier.doi	10.1016/S0165-2370(97)00061-2	en
dc.identifier.isi	ISI:A1997YF95100004	en
dc.identifier.volume	43	en
dc.identifier.issue	2	en
dc.identifier.spage	139	en
dc.identifier.epage	144	en