Effect of key parameters on the photocatalytic oxidation of toluene at low concentrations in air under 254 + 185 nm UV irradiation

Autores
Quici, Natalia; Vera, Maria Laura; Choi, Hyeok; Puma, Gianluca Li; Dionysiou, Dionysios D.; Litter, Marta Irene; Destaillats, Hugo
Año de publicación
2010
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
The effect of key experimental parameters on the removal of toluene under 254 + 185 nm irradiation was investigated using a benchtop photocatalytic flow reactor. Toluene was introduced at low concentrations between 10 and 500 ppbv, typical of indoor environments, and reacted on TiO2-coated Raschig rings. Two different TiO2-coated rings were prepared: in one case, by dip-coating using a P25 aqueous suspension and, on the other, using an organic/inorganic sol?gel method that produced thin films of mesoporous anatase. Toluene removal efficiencies were between 30% and 90%, indicating that the system did not achieve total conversion under the present experimental conditions. For each air flow rate, the conversion of toluene was significantly higher when the reactor length was 10 cm, as compared with 5 cm; however, only marginal increases in conversions were achieved in the two reactor lengths at equal residence time and different concentrations of toluene, suggesting that the system is effectively behaving as an ideal reactor and that the reaction is first-order in the concentration of toluene. Experiments were carried out between 0% and 66% relative humidity (RH), the fastest reaction rate being observed at moderately low humidity conditions (10% RH). Formaldehyde was formed as a partial oxidation byproduct at low and at high residence times (240 and 960 ms), although higher formaldehyde molar yields (up to 20%) were observed at low t (240 ms) and moderate humidity conditions (10% and 33%), suggesting that both t and RH can be optimized to reduce the formation of harmful intermediates. Toluene removal efficiency increased with the TiO2 thickness (i.e., mass) until a maximum value of 500 nm, beyond which the removal efficiency did not increase further.
Fil: Quici, Natalia. Comisión Nacional de Energía Atómica; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Vera, Maria Laura. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Nordeste. Instituto de Materiales de Misiones. Universidad Nacional de Misiones. Facultad de Ciencias Exactas, Químicas y Naturales. Instituto de Materiales de Misiones; Argentina
Fil: Choi, Hyeok. University of Texas; Estados Unidos
Fil: Puma, Gianluca Li. University of Nottingham; Estados Unidos
Fil: Dionysiou, Dionysios D.. University of Cincinnati; Estados Unidos
Fil: Litter, Marta Irene. Comisión Nacional de Energía Atómica; Argentina. Universidad Nacional de San Martín. Instituto de Investigación e Ingeniería Ambiental. - Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Instituto de Investigación e Ingeniería Ambiental; Argentina
Fil: Destaillats, Hugo. Arizona State University; Estados Unidos
Materia
HETEROGENOUS PHOTOCATALYSIS
TIO2
TITANIA
TOLUENE
UVPCO
PHOTOCATALYTIC OXIDATION
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/280118
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/280118
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Effect of key parameters on the photocatalytic oxidation of toluene at low concentrations in air under 254 + 185 nm UV irradiationQuici, NataliaVera, Maria LauraChoi, HyeokPuma, Gianluca LiDionysiou, Dionysios D.Litter, Marta IreneDestaillats, HugoHETEROGENOUS PHOTOCATALYSISTIO2TITANIATOLUENEUVPCOPHOTOCATALYTIC OXIDATIONhttps://purl.org/becyt/ford/1.4https://purl.org/becyt/ford/1The effect of key experimental parameters on the removal of toluene under 254 + 185 nm irradiation was investigated using a benchtop photocatalytic flow reactor. Toluene was introduced at low concentrations between 10 and 500 ppbv, typical of indoor environments, and reacted on TiO2-coated Raschig rings. Two different TiO2-coated rings were prepared: in one case, by dip-coating using a P25 aqueous suspension and, on the other, using an organic/inorganic sol?gel method that produced thin films of mesoporous anatase. Toluene removal efficiencies were between 30% and 90%, indicating that the system did not achieve total conversion under the present experimental conditions. For each air flow rate, the conversion of toluene was significantly higher when the reactor length was 10 cm, as compared with 5 cm; however, only marginal increases in conversions were achieved in the two reactor lengths at equal residence time and different concentrations of toluene, suggesting that the system is effectively behaving as an ideal reactor and that the reaction is first-order in the concentration of toluene. Experiments were carried out between 0% and 66% relative humidity (RH), the fastest reaction rate being observed at moderately low humidity conditions (10% RH). Formaldehyde was formed as a partial oxidation byproduct at low and at high residence times (240 and 960 ms), although higher formaldehyde molar yields (up to 20%) were observed at low t (240 ms) and moderate humidity conditions (10% and 33%), suggesting that both t and RH can be optimized to reduce the formation of harmful intermediates. Toluene removal efficiency increased with the TiO2 thickness (i.e., mass) until a maximum value of 500 nm, beyond which the removal efficiency did not increase further.Fil: Quici, Natalia. Comisión Nacional de Energía Atómica; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Vera, Maria Laura. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Nordeste. Instituto de Materiales de Misiones. Universidad Nacional de Misiones. Facultad de Ciencias Exactas, Químicas y Naturales. Instituto de Materiales de Misiones; ArgentinaFil: Choi, Hyeok. University of Texas; Estados UnidosFil: Puma, Gianluca Li. University of Nottingham; Estados UnidosFil: Dionysiou, Dionysios D.. University of Cincinnati; Estados UnidosFil: Litter, Marta Irene. Comisión Nacional de Energía Atómica; Argentina. Universidad Nacional de San Martín. Instituto de Investigación e Ingeniería Ambiental. - Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Instituto de Investigación e Ingeniería Ambiental; ArgentinaFil: Destaillats, Hugo. Arizona State University; Estados UnidosElsevier Science2010-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/280118Quici, Natalia; Vera, Maria Laura; Choi, Hyeok; Puma, Gianluca Li; Dionysiou, Dionysios D.; et al.; Effect of key parameters on the photocatalytic oxidation of toluene at low concentrations in air under 254 + 185 nm UV irradiation; Elsevier Science; Applied Catalysis B: Environmental; 95; 3-4; 1-2010; 312-3190926-3373CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/abs/pii/S0926337310000226info:eu-repo/semantics/altIdentifier/doi/10.1016/j.apcatb.2010.01.009info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2026-02-26T10:32:37Zoai:ri.conicet.gov.ar:11336/280118instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982026-02-26 10:32:37.74CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Effect of key parameters on the photocatalytic oxidation of toluene at low concentrations in air under 254 + 185 nm UV irradiation
title Effect of key parameters on the photocatalytic oxidation of toluene at low concentrations in air under 254 + 185 nm UV irradiation
spellingShingle Effect of key parameters on the photocatalytic oxidation of toluene at low concentrations in air under 254 + 185 nm UV irradiation
Quici, Natalia
HETEROGENOUS PHOTOCATALYSIS
TIO2
TITANIA
TOLUENE
UVPCO
PHOTOCATALYTIC OXIDATION
title_short Effect of key parameters on the photocatalytic oxidation of toluene at low concentrations in air under 254 + 185 nm UV irradiation
title_full Effect of key parameters on the photocatalytic oxidation of toluene at low concentrations in air under 254 + 185 nm UV irradiation
title_fullStr Effect of key parameters on the photocatalytic oxidation of toluene at low concentrations in air under 254 + 185 nm UV irradiation
title_full_unstemmed Effect of key parameters on the photocatalytic oxidation of toluene at low concentrations in air under 254 + 185 nm UV irradiation
title_sort Effect of key parameters on the photocatalytic oxidation of toluene at low concentrations in air under 254 + 185 nm UV irradiation
dc.creator.none.fl_str_mv Quici, Natalia
Vera, Maria Laura
Choi, Hyeok
Puma, Gianluca Li
Dionysiou, Dionysios D.
Litter, Marta Irene
Destaillats, Hugo
author Quici, Natalia
author_facet Quici, Natalia
Vera, Maria Laura
Choi, Hyeok
Puma, Gianluca Li
Dionysiou, Dionysios D.
Litter, Marta Irene
Destaillats, Hugo
author_role author
author2 Vera, Maria Laura
Choi, Hyeok
Puma, Gianluca Li
Dionysiou, Dionysios D.
Litter, Marta Irene
Destaillats, Hugo
author2_role author
author
author
author
author
author
dc.subject.none.fl_str_mv HETEROGENOUS PHOTOCATALYSIS
TIO2
TITANIA
TOLUENE
UVPCO
PHOTOCATALYTIC OXIDATION
topic HETEROGENOUS PHOTOCATALYSIS
TIO2
TITANIA
TOLUENE
UVPCO
PHOTOCATALYTIC OXIDATION
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.4
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv The effect of key experimental parameters on the removal of toluene under 254 + 185 nm irradiation was investigated using a benchtop photocatalytic flow reactor. Toluene was introduced at low concentrations between 10 and 500 ppbv, typical of indoor environments, and reacted on TiO2-coated Raschig rings. Two different TiO2-coated rings were prepared: in one case, by dip-coating using a P25 aqueous suspension and, on the other, using an organic/inorganic sol?gel method that produced thin films of mesoporous anatase. Toluene removal efficiencies were between 30% and 90%, indicating that the system did not achieve total conversion under the present experimental conditions. For each air flow rate, the conversion of toluene was significantly higher when the reactor length was 10 cm, as compared with 5 cm; however, only marginal increases in conversions were achieved in the two reactor lengths at equal residence time and different concentrations of toluene, suggesting that the system is effectively behaving as an ideal reactor and that the reaction is first-order in the concentration of toluene. Experiments were carried out between 0% and 66% relative humidity (RH), the fastest reaction rate being observed at moderately low humidity conditions (10% RH). Formaldehyde was formed as a partial oxidation byproduct at low and at high residence times (240 and 960 ms), although higher formaldehyde molar yields (up to 20%) were observed at low t (240 ms) and moderate humidity conditions (10% and 33%), suggesting that both t and RH can be optimized to reduce the formation of harmful intermediates. Toluene removal efficiency increased with the TiO2 thickness (i.e., mass) until a maximum value of 500 nm, beyond which the removal efficiency did not increase further.
Fil: Quici, Natalia. Comisión Nacional de Energía Atómica; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Vera, Maria Laura. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Nordeste. Instituto de Materiales de Misiones. Universidad Nacional de Misiones. Facultad de Ciencias Exactas, Químicas y Naturales. Instituto de Materiales de Misiones; Argentina
Fil: Choi, Hyeok. University of Texas; Estados Unidos
Fil: Puma, Gianluca Li. University of Nottingham; Estados Unidos
Fil: Dionysiou, Dionysios D.. University of Cincinnati; Estados Unidos
Fil: Litter, Marta Irene. Comisión Nacional de Energía Atómica; Argentina. Universidad Nacional de San Martín. Instituto de Investigación e Ingeniería Ambiental. - Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Instituto de Investigación e Ingeniería Ambiental; Argentina
Fil: Destaillats, Hugo. Arizona State University; Estados Unidos
description The effect of key experimental parameters on the removal of toluene under 254 + 185 nm irradiation was investigated using a benchtop photocatalytic flow reactor. Toluene was introduced at low concentrations between 10 and 500 ppbv, typical of indoor environments, and reacted on TiO2-coated Raschig rings. Two different TiO2-coated rings were prepared: in one case, by dip-coating using a P25 aqueous suspension and, on the other, using an organic/inorganic sol?gel method that produced thin films of mesoporous anatase. Toluene removal efficiencies were between 30% and 90%, indicating that the system did not achieve total conversion under the present experimental conditions. For each air flow rate, the conversion of toluene was significantly higher when the reactor length was 10 cm, as compared with 5 cm; however, only marginal increases in conversions were achieved in the two reactor lengths at equal residence time and different concentrations of toluene, suggesting that the system is effectively behaving as an ideal reactor and that the reaction is first-order in the concentration of toluene. Experiments were carried out between 0% and 66% relative humidity (RH), the fastest reaction rate being observed at moderately low humidity conditions (10% RH). Formaldehyde was formed as a partial oxidation byproduct at low and at high residence times (240 and 960 ms), although higher formaldehyde molar yields (up to 20%) were observed at low t (240 ms) and moderate humidity conditions (10% and 33%), suggesting that both t and RH can be optimized to reduce the formation of harmful intermediates. Toluene removal efficiency increased with the TiO2 thickness (i.e., mass) until a maximum value of 500 nm, beyond which the removal efficiency did not increase further.
publishDate 2010
dc.date.none.fl_str_mv 2010-01
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/280118
Quici, Natalia; Vera, Maria Laura; Choi, Hyeok; Puma, Gianluca Li; Dionysiou, Dionysios D.; et al.; Effect of key parameters on the photocatalytic oxidation of toluene at low concentrations in air under 254 + 185 nm UV irradiation; Elsevier Science; Applied Catalysis B: Environmental; 95; 3-4; 1-2010; 312-319
0926-3373
CONICET Digital
CONICET
url http://hdl.handle.net/11336/280118
identifier_str_mv Quici, Natalia; Vera, Maria Laura; Choi, Hyeok; Puma, Gianluca Li; Dionysiou, Dionysios D.; et al.; Effect of key parameters on the photocatalytic oxidation of toluene at low concentrations in air under 254 + 185 nm UV irradiation; Elsevier Science; Applied Catalysis B: Environmental; 95; 3-4; 1-2010; 312-319
0926-3373
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/abs/pii/S0926337310000226
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.apcatb.2010.01.009
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
application/pdf
application/pdf
dc.publisher.none.fl_str_mv Elsevier Science
publisher.none.fl_str_mv Elsevier Science
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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score 12.665996

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