CATALYTIC OXIDATION OF EMISSIONS IN COMBUSTION SYSTEMS FOR FOREST BIOMASS, USING CATALYSTS WITH TiO2 SUPPORT

A study was made of the catalytic oxidation of a model mixture of effluents from forest biomass combustion equipment, consisting principally of methane (CH4), naphthalene (C10H8), carbon monoxide (CO) and oxygen-poor air (10% O2, balance N2), in a laboratory reactor, using MeOx/TiO2 catalysts (Me =...

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Autores principales:	CERDA,CRISTIÁN, ROMERO,LEONARDO, JIMÉNEZ,ROMEL, FUENTES,GUSTAVO, CENTENO,MIGUEL ANGEL, ALARCÓN,NELSON
Lenguaje:	English
Publicado:	Sociedad Chilena de Química 2006
Materias:	Transition metal oxides Catalytic combustion Methane, VOCs Carbon monoxide
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-97072006000400004
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spelling	oai:scielo:S0717-970720060004000042007-03-08CATALYTIC OXIDATION OF EMISSIONS IN COMBUSTION SYSTEMS FOR FOREST BIOMASS, USING CATALYSTS WITH TiO2 SUPPORTCERDA,CRISTIÁNROMERO,LEONARDOJIMÉNEZ,ROMELFUENTES,GUSTAVOCENTENO,MIGUEL ANGELALARCÓN,NELSON Transition metal oxides Catalytic combustion Methane, VOCs Carbon monoxide A study was made of the catalytic oxidation of a model mixture of effluents from forest biomass combustion equipment, consisting principally of methane (CH4), naphthalene (C10H8), carbon monoxide (CO) and oxygen-poor air (10% O2, balance N2), in a laboratory reactor, using MeOx/TiO2 catalysts (Me = Fe, Cu or Mn), prepared using incipient wetness impregnation. It was observed that the addition of metal oxides to the TiO2 increases catalytic activity in the combustion of all the contaminants present in the model effluent (CH4, C10H8 and CO). The catalysts were characterised using the following techniques: SBET, XRD, DTG/DTA and TPD-NH3; and from these it was observed that the support presented only the anatase phase in all the catalysts, despite having been subjected to temperatures in excess of 1.000 K during combustion. The highest acidity among all the solids tested, measured by TPD-NH3, was obtained for the FeOx/TiO2 catalysts, which were also those which showed the greatest catalytic activity. This high level of activity may be related to the formation of isolated metallic phases; i.e. hematite (Fe2O3), which would be the active phase in the combustion of C10H8 and CH4. On the other hand, with to respect to the 5 % wt. values of Me/TiO2 (Me: Fe, Cu y Mn) catalysts, the CuO/TiO2 catalyst shows greater activity than Fe2O3/TiO2 and MnOx/TiO2 for the oxidation of CO, which would be related to the formation of CuO on the TiO2 surface. The formation of mixed phases between the metals and the TiO2 was not observed. The SBET of the most active catalyst, Fe2O3/TiO2 (where Fe is 5% w/w in value), was not subject to any changes during the reactioninfo:eu-repo/semantics/openAccessSociedad Chilena de QuímicaJournal of the Chilean Chemical Society v.51 n.4 20062006-12-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-97072006000400004en10.4067/S0717-97072006000400004
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Transition metal oxides Catalytic combustion Methane, VOCs Carbon monoxide
spellingShingle	Transition metal oxides Catalytic combustion Methane, VOCs Carbon monoxide CERDA,CRISTIÁN ROMERO,LEONARDO JIMÉNEZ,ROMEL FUENTES,GUSTAVO CENTENO,MIGUEL ANGEL ALARCÓN,NELSON CATALYTIC OXIDATION OF EMISSIONS IN COMBUSTION SYSTEMS FOR FOREST BIOMASS, USING CATALYSTS WITH TiO2 SUPPORT
description	A study was made of the catalytic oxidation of a model mixture of effluents from forest biomass combustion equipment, consisting principally of methane (CH4), naphthalene (C10H8), carbon monoxide (CO) and oxygen-poor air (10% O2, balance N2), in a laboratory reactor, using MeOx/TiO2 catalysts (Me = Fe, Cu or Mn), prepared using incipient wetness impregnation. It was observed that the addition of metal oxides to the TiO2 increases catalytic activity in the combustion of all the contaminants present in the model effluent (CH4, C10H8 and CO). The catalysts were characterised using the following techniques: SBET, XRD, DTG/DTA and TPD-NH3; and from these it was observed that the support presented only the anatase phase in all the catalysts, despite having been subjected to temperatures in excess of 1.000 K during combustion. The highest acidity among all the solids tested, measured by TPD-NH3, was obtained for the FeOx/TiO2 catalysts, which were also those which showed the greatest catalytic activity. This high level of activity may be related to the formation of isolated metallic phases; i.e. hematite (Fe2O3), which would be the active phase in the combustion of C10H8 and CH4. On the other hand, with to respect to the 5 % wt. values of Me/TiO2 (Me: Fe, Cu y Mn) catalysts, the CuO/TiO2 catalyst shows greater activity than Fe2O3/TiO2 and MnOx/TiO2 for the oxidation of CO, which would be related to the formation of CuO on the TiO2 surface. The formation of mixed phases between the metals and the TiO2 was not observed. The SBET of the most active catalyst, Fe2O3/TiO2 (where Fe is 5% w/w in value), was not subject to any changes during the reaction
author	CERDA,CRISTIÁN ROMERO,LEONARDO JIMÉNEZ,ROMEL FUENTES,GUSTAVO CENTENO,MIGUEL ANGEL ALARCÓN,NELSON
author_facet	CERDA,CRISTIÁN ROMERO,LEONARDO JIMÉNEZ,ROMEL FUENTES,GUSTAVO CENTENO,MIGUEL ANGEL ALARCÓN,NELSON
author_sort	CERDA,CRISTIÁN
title	CATALYTIC OXIDATION OF EMISSIONS IN COMBUSTION SYSTEMS FOR FOREST BIOMASS, USING CATALYSTS WITH TiO2 SUPPORT
title_short	CATALYTIC OXIDATION OF EMISSIONS IN COMBUSTION SYSTEMS FOR FOREST BIOMASS, USING CATALYSTS WITH TiO2 SUPPORT
title_full	CATALYTIC OXIDATION OF EMISSIONS IN COMBUSTION SYSTEMS FOR FOREST BIOMASS, USING CATALYSTS WITH TiO2 SUPPORT
title_fullStr	CATALYTIC OXIDATION OF EMISSIONS IN COMBUSTION SYSTEMS FOR FOREST BIOMASS, USING CATALYSTS WITH TiO2 SUPPORT
title_full_unstemmed	CATALYTIC OXIDATION OF EMISSIONS IN COMBUSTION SYSTEMS FOR FOREST BIOMASS, USING CATALYSTS WITH TiO2 SUPPORT
title_sort	catalytic oxidation of emissions in combustion systems for forest biomass, using catalysts with tio2 support
publisher	Sociedad Chilena de Química
publishDate	2006
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-97072006000400004
work_keys_str_mv	AT cerdacristian catalyticoxidationofemissionsincombustionsystemsforforestbiomassusingcatalystswithtio2support AT romeroleonardo catalyticoxidationofemissionsincombustionsystemsforforestbiomassusingcatalystswithtio2support AT jimenezromel catalyticoxidationofemissionsincombustionsystemsforforestbiomassusingcatalystswithtio2support AT fuentesgustavo catalyticoxidationofemissionsincombustionsystemsforforestbiomassusingcatalystswithtio2support AT centenomiguelangel catalyticoxidationofemissionsincombustionsystemsforforestbiomassusingcatalystswithtio2support AT alarconnelson catalyticoxidationofemissionsincombustionsystemsforforestbiomassusingcatalystswithtio2support
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CATALYTIC OXIDATION OF EMISSIONS IN COMBUSTION SYSTEMS FOR FOREST BIOMASS, USING CATALYSTS WITH TiO2 SUPPORT

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