Synthetic coal chars for the elucidation of NO heterogeneous reduction mechanisms

9 pages, 6 figures, 1 table.-- Available online 14 August 2006.

Bibliographic Details
Authors: Pevida García, Covadonga, Arenillas de la Puente, Ana, Rubiera González, Fernando, Pis Martínez, José Juan
Format: article
Publication Date:2007
Country:España
Institution:Consejo Superior de Investigaciones Científicas (CSIC)
Repository:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/11020
Online Access:http://hdl.handle.net/10261/11020
Access Level:Open access
Keyword:NO heterogeneous reduction
Coal char
Isotopically labelled NO
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spelling Synthetic coal chars for the elucidation of NO heterogeneous reduction mechanismsPevida García, CovadongaArenillas de la Puente, AnaRubiera González, FernandoPis Martínez, José JuanNO heterogeneous reductionCoal charIsotopically labelled NO9 pages, 6 figures, 1 table.-- Available online 14 August 2006.In the present work, the mechanisms involved in NO–char heterogeneous reduction have been studied using a synthetic coal char (SC char) as carbon source. Another synthetic char (SN char) without nitrogen in its composition has also been employed in these studies. Isothermal reduction tests at different temperatures have been carried out. Two temperature regimes were considered: low temperature (T < 250°C) where NO chemisorption takes place and high temperature (T > 250°C) where NO–C reaction occurs. Step response experiments combining consecutive reaction stages with NO and 15NO were performed in order to determine the role of nitrogen surface complexes, C(N), in the reduction process. The results revealed N2 and CO2 to be the main reduction products under the experimental conditions employed in this work. NO chemisorption at lower temperatures results in N2 emission and surface complexes (mainly oxygenated) formation, while char gasification by NO involves a direct NO attack on the char surface to form surface complexes. As a consequence of desorption of these complexes new sites of reaction are created.C.P. gratefully acknowledges CSIC I3P Programme, co-financed by the European Social Fund, for financial support.Peer reviewedElsevier200920092007info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_650122195 bytesapplication/pdfhttp://hdl.handle.net/10261/11020reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Ingléshttp://dx.doi.org/10.1016/j.fuel.2006.07.002info:eu-repo/semantics/openAccessoai:digital.csic.es:10261/110202026-05-22T06:33:51Z
dc.title.none.fl_str_mv Synthetic coal chars for the elucidation of NO heterogeneous reduction mechanisms
title Synthetic coal chars for the elucidation of NO heterogeneous reduction mechanisms
spellingShingle Synthetic coal chars for the elucidation of NO heterogeneous reduction mechanisms
Pevida García, Covadonga
NO heterogeneous reduction
Coal char
Isotopically labelled NO
title_short Synthetic coal chars for the elucidation of NO heterogeneous reduction mechanisms
title_full Synthetic coal chars for the elucidation of NO heterogeneous reduction mechanisms
title_fullStr Synthetic coal chars for the elucidation of NO heterogeneous reduction mechanisms
title_full_unstemmed Synthetic coal chars for the elucidation of NO heterogeneous reduction mechanisms
title_sort Synthetic coal chars for the elucidation of NO heterogeneous reduction mechanisms
dc.creator.none.fl_str_mv Pevida García, Covadonga
Arenillas de la Puente, Ana
Rubiera González, Fernando
Pis Martínez, José Juan
author Pevida García, Covadonga
author_facet Pevida García, Covadonga
Arenillas de la Puente, Ana
Rubiera González, Fernando
Pis Martínez, José Juan
author_role author
author2 Arenillas de la Puente, Ana
Rubiera González, Fernando
Pis Martínez, José Juan
author2_role author
author
author
dc.subject.none.fl_str_mv NO heterogeneous reduction
Coal char
Isotopically labelled NO
topic NO heterogeneous reduction
Coal char
Isotopically labelled NO
description 9 pages, 6 figures, 1 table.-- Available online 14 August 2006.
publishDate 2007
dc.date.none.fl_str_mv 2007
2009
2009
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
format article
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/11020
url http://hdl.handle.net/10261/11020
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv http://dx.doi.org/10.1016/j.fuel.2006.07.002
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv 22195 bytes
application/pdf
dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
dc.source.none.fl_str_mv reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC
instname:Consejo Superior de Investigaciones Científicas (CSIC)
instname_str Consejo Superior de Investigaciones Científicas (CSIC)
reponame_str DIGITAL.CSIC. Repositorio Institucional del CSIC
collection DIGITAL.CSIC. Repositorio Institucional del CSIC
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15.811543

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