The role of cerium in the improved SO2 tolerance for NO reduction with NH3 over Mn-Ce/TiO2 catalyst at low temperature
Abstract Manganese-based catalysts have shown excellent low-temperature selective catalytic reduction (SCR) activity for NO x removal. However, they all suffer from the serious SO2 poisoning effect on activity. Ceria modification has been reported to be able to promote SO2 tolerance of SCR catalysts...
Ausführliche Beschreibung
Autor*in: |
Jin, Ruiben [verfasserIn] |
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Englisch |
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2014transfer abstract |
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Enthalten in: Comparability studies of hemin from two different origins porcine and bovine in the production of - Beri, Suresh ELSEVIER, 2020, an international journal devoted to catalytic science and its applications, Amsterdam |
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Übergeordnetes Werk: |
volume:148 ; year:2014 ; day:27 ; month:04 ; pages:582-588 ; extent:7 |
Links: |
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DOI / URN: |
10.1016/j.apcatb.2013.09.016 |
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ELV017680360 |
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245 | 1 | 4 | |a The role of cerium in the improved SO2 tolerance for NO reduction with NH3 over Mn-Ce/TiO2 catalyst at low temperature |
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520 | |a Abstract Manganese-based catalysts have shown excellent low-temperature selective catalytic reduction (SCR) activity for NO x removal. However, they all suffer from the serious SO2 poisoning effect on activity. Ceria modification has been reported to be able to promote SO2 tolerance of SCR catalysts probably via the inhibition of surface sulfate species formation. In this study, in situ diffuse reflectance infrared transform spectroscopy (DRIFT) investigations were carried out to determine the role of Ceria in the improved resistance for a Ce-modified Mn/TiO2 catalyst. The results indicated that after the introduction of Ce, SO x ad-species preferentially formed on Ceria as bulk-like sulfate species and lessened the sulfation of the main active phase (MnO x ) during low-temperature SCR processes in the presence of SO2. Furthermore, the DRIFT and TG–DSC results also implied that Ce modification could reduce thermal stabilities of the sulfate species covered on catalyst surface, thereby promoting its decomposition. Both of these would be beneficial to the improved SO2 tolerance of Ce modified catalysts. | ||
520 | |a Abstract Manganese-based catalysts have shown excellent low-temperature selective catalytic reduction (SCR) activity for NO x removal. However, they all suffer from the serious SO2 poisoning effect on activity. Ceria modification has been reported to be able to promote SO2 tolerance of SCR catalysts probably via the inhibition of surface sulfate species formation. In this study, in situ diffuse reflectance infrared transform spectroscopy (DRIFT) investigations were carried out to determine the role of Ceria in the improved resistance for a Ce-modified Mn/TiO2 catalyst. The results indicated that after the introduction of Ce, SO x ad-species preferentially formed on Ceria as bulk-like sulfate species and lessened the sulfation of the main active phase (MnO x ) during low-temperature SCR processes in the presence of SO2. Furthermore, the DRIFT and TG–DSC results also implied that Ce modification could reduce thermal stabilities of the sulfate species covered on catalyst surface, thereby promoting its decomposition. Both of these would be beneficial to the improved SO2 tolerance of Ce modified catalysts. | ||
650 | 7 | |a SCR |2 Elsevier | |
650 | 7 | |a Low-temperature |2 Elsevier | |
650 | 7 | |a Nitrogen oxides |2 Elsevier | |
650 | 7 | |a SO2 tolerance |2 Elsevier | |
650 | 7 | |a DRIFT |2 Elsevier | |
700 | 1 | |a Liu, Yue |4 oth | |
700 | 1 | |a Wang, Yan |4 oth | |
700 | 1 | |a Cen, Wanglai |4 oth | |
700 | 1 | |a Wu, Zhongbiao |4 oth | |
700 | 1 | |a Wang, Haiqiang |4 oth | |
700 | 1 | |a Weng, Xiaole |4 oth | |
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10.1016/j.apcatb.2013.09.016 doi GBVA2014015000014.pica (DE-627)ELV017680360 (ELSEVIER)S0926-3373(13)00581-X DE-627 ger DE-627 rakwb eng 540 540 DE-600 570 VZ BIODIV DE-30 fid PHARM DE-84 fid 44.00 bkl Jin, Ruiben verfasserin aut The role of cerium in the improved SO2 tolerance for NO reduction with NH3 over Mn-Ce/TiO2 catalyst at low temperature 2014transfer abstract 7 nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier Abstract Manganese-based catalysts have shown excellent low-temperature selective catalytic reduction (SCR) activity for NO x removal. However, they all suffer from the serious SO2 poisoning effect on activity. Ceria modification has been reported to be able to promote SO2 tolerance of SCR catalysts probably via the inhibition of surface sulfate species formation. In this study, in situ diffuse reflectance infrared transform spectroscopy (DRIFT) investigations were carried out to determine the role of Ceria in the improved resistance for a Ce-modified Mn/TiO2 catalyst. The results indicated that after the introduction of Ce, SO x ad-species preferentially formed on Ceria as bulk-like sulfate species and lessened the sulfation of the main active phase (MnO x ) during low-temperature SCR processes in the presence of SO2. Furthermore, the DRIFT and TG–DSC results also implied that Ce modification could reduce thermal stabilities of the sulfate species covered on catalyst surface, thereby promoting its decomposition. Both of these would be beneficial to the improved SO2 tolerance of Ce modified catalysts. Abstract Manganese-based catalysts have shown excellent low-temperature selective catalytic reduction (SCR) activity for NO x removal. However, they all suffer from the serious SO2 poisoning effect on activity. Ceria modification has been reported to be able to promote SO2 tolerance of SCR catalysts probably via the inhibition of surface sulfate species formation. In this study, in situ diffuse reflectance infrared transform spectroscopy (DRIFT) investigations were carried out to determine the role of Ceria in the improved resistance for a Ce-modified Mn/TiO2 catalyst. The results indicated that after the introduction of Ce, SO x ad-species preferentially formed on Ceria as bulk-like sulfate species and lessened the sulfation of the main active phase (MnO x ) during low-temperature SCR processes in the presence of SO2. Furthermore, the DRIFT and TG–DSC results also implied that Ce modification could reduce thermal stabilities of the sulfate species covered on catalyst surface, thereby promoting its decomposition. Both of these would be beneficial to the improved SO2 tolerance of Ce modified catalysts. SCR Elsevier Low-temperature Elsevier Nitrogen oxides Elsevier SO2 tolerance Elsevier DRIFT Elsevier Liu, Yue oth Wang, Yan oth Cen, Wanglai oth Wu, Zhongbiao oth Wang, Haiqiang oth Weng, Xiaole oth Enthalten in Elsevier Beri, Suresh ELSEVIER Comparability studies of hemin from two different origins porcine and bovine in the production of 2020 an international journal devoted to catalytic science and its applications Amsterdam (DE-627)ELV004775082 volume:148 year:2014 day:27 month:04 pages:582-588 extent:7 https://doi.org/10.1016/j.apcatb.2013.09.016 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U FID-BIODIV FID-PHARM SSG-OLC-PHA SSG-OPC-PHA 44.00 Medizin: Allgemeines VZ AR 148 2014 27 0427 582-588 7 045F 540 |
spelling |
10.1016/j.apcatb.2013.09.016 doi GBVA2014015000014.pica (DE-627)ELV017680360 (ELSEVIER)S0926-3373(13)00581-X DE-627 ger DE-627 rakwb eng 540 540 DE-600 570 VZ BIODIV DE-30 fid PHARM DE-84 fid 44.00 bkl Jin, Ruiben verfasserin aut The role of cerium in the improved SO2 tolerance for NO reduction with NH3 over Mn-Ce/TiO2 catalyst at low temperature 2014transfer abstract 7 nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier Abstract Manganese-based catalysts have shown excellent low-temperature selective catalytic reduction (SCR) activity for NO x removal. However, they all suffer from the serious SO2 poisoning effect on activity. Ceria modification has been reported to be able to promote SO2 tolerance of SCR catalysts probably via the inhibition of surface sulfate species formation. In this study, in situ diffuse reflectance infrared transform spectroscopy (DRIFT) investigations were carried out to determine the role of Ceria in the improved resistance for a Ce-modified Mn/TiO2 catalyst. The results indicated that after the introduction of Ce, SO x ad-species preferentially formed on Ceria as bulk-like sulfate species and lessened the sulfation of the main active phase (MnO x ) during low-temperature SCR processes in the presence of SO2. Furthermore, the DRIFT and TG–DSC results also implied that Ce modification could reduce thermal stabilities of the sulfate species covered on catalyst surface, thereby promoting its decomposition. Both of these would be beneficial to the improved SO2 tolerance of Ce modified catalysts. Abstract Manganese-based catalysts have shown excellent low-temperature selective catalytic reduction (SCR) activity for NO x removal. However, they all suffer from the serious SO2 poisoning effect on activity. Ceria modification has been reported to be able to promote SO2 tolerance of SCR catalysts probably via the inhibition of surface sulfate species formation. In this study, in situ diffuse reflectance infrared transform spectroscopy (DRIFT) investigations were carried out to determine the role of Ceria in the improved resistance for a Ce-modified Mn/TiO2 catalyst. The results indicated that after the introduction of Ce, SO x ad-species preferentially formed on Ceria as bulk-like sulfate species and lessened the sulfation of the main active phase (MnO x ) during low-temperature SCR processes in the presence of SO2. Furthermore, the DRIFT and TG–DSC results also implied that Ce modification could reduce thermal stabilities of the sulfate species covered on catalyst surface, thereby promoting its decomposition. Both of these would be beneficial to the improved SO2 tolerance of Ce modified catalysts. SCR Elsevier Low-temperature Elsevier Nitrogen oxides Elsevier SO2 tolerance Elsevier DRIFT Elsevier Liu, Yue oth Wang, Yan oth Cen, Wanglai oth Wu, Zhongbiao oth Wang, Haiqiang oth Weng, Xiaole oth Enthalten in Elsevier Beri, Suresh ELSEVIER Comparability studies of hemin from two different origins porcine and bovine in the production of 2020 an international journal devoted to catalytic science and its applications Amsterdam (DE-627)ELV004775082 volume:148 year:2014 day:27 month:04 pages:582-588 extent:7 https://doi.org/10.1016/j.apcatb.2013.09.016 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U FID-BIODIV FID-PHARM SSG-OLC-PHA SSG-OPC-PHA 44.00 Medizin: Allgemeines VZ AR 148 2014 27 0427 582-588 7 045F 540 |
allfields_unstemmed |
10.1016/j.apcatb.2013.09.016 doi GBVA2014015000014.pica (DE-627)ELV017680360 (ELSEVIER)S0926-3373(13)00581-X DE-627 ger DE-627 rakwb eng 540 540 DE-600 570 VZ BIODIV DE-30 fid PHARM DE-84 fid 44.00 bkl Jin, Ruiben verfasserin aut The role of cerium in the improved SO2 tolerance for NO reduction with NH3 over Mn-Ce/TiO2 catalyst at low temperature 2014transfer abstract 7 nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier Abstract Manganese-based catalysts have shown excellent low-temperature selective catalytic reduction (SCR) activity for NO x removal. However, they all suffer from the serious SO2 poisoning effect on activity. Ceria modification has been reported to be able to promote SO2 tolerance of SCR catalysts probably via the inhibition of surface sulfate species formation. In this study, in situ diffuse reflectance infrared transform spectroscopy (DRIFT) investigations were carried out to determine the role of Ceria in the improved resistance for a Ce-modified Mn/TiO2 catalyst. The results indicated that after the introduction of Ce, SO x ad-species preferentially formed on Ceria as bulk-like sulfate species and lessened the sulfation of the main active phase (MnO x ) during low-temperature SCR processes in the presence of SO2. Furthermore, the DRIFT and TG–DSC results also implied that Ce modification could reduce thermal stabilities of the sulfate species covered on catalyst surface, thereby promoting its decomposition. Both of these would be beneficial to the improved SO2 tolerance of Ce modified catalysts. Abstract Manganese-based catalysts have shown excellent low-temperature selective catalytic reduction (SCR) activity for NO x removal. However, they all suffer from the serious SO2 poisoning effect on activity. Ceria modification has been reported to be able to promote SO2 tolerance of SCR catalysts probably via the inhibition of surface sulfate species formation. In this study, in situ diffuse reflectance infrared transform spectroscopy (DRIFT) investigations were carried out to determine the role of Ceria in the improved resistance for a Ce-modified Mn/TiO2 catalyst. The results indicated that after the introduction of Ce, SO x ad-species preferentially formed on Ceria as bulk-like sulfate species and lessened the sulfation of the main active phase (MnO x ) during low-temperature SCR processes in the presence of SO2. Furthermore, the DRIFT and TG–DSC results also implied that Ce modification could reduce thermal stabilities of the sulfate species covered on catalyst surface, thereby promoting its decomposition. Both of these would be beneficial to the improved SO2 tolerance of Ce modified catalysts. SCR Elsevier Low-temperature Elsevier Nitrogen oxides Elsevier SO2 tolerance Elsevier DRIFT Elsevier Liu, Yue oth Wang, Yan oth Cen, Wanglai oth Wu, Zhongbiao oth Wang, Haiqiang oth Weng, Xiaole oth Enthalten in Elsevier Beri, Suresh ELSEVIER Comparability studies of hemin from two different origins porcine and bovine in the production of 2020 an international journal devoted to catalytic science and its applications Amsterdam (DE-627)ELV004775082 volume:148 year:2014 day:27 month:04 pages:582-588 extent:7 https://doi.org/10.1016/j.apcatb.2013.09.016 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U FID-BIODIV FID-PHARM SSG-OLC-PHA SSG-OPC-PHA 44.00 Medizin: Allgemeines VZ AR 148 2014 27 0427 582-588 7 045F 540 |
allfieldsGer |
10.1016/j.apcatb.2013.09.016 doi GBVA2014015000014.pica (DE-627)ELV017680360 (ELSEVIER)S0926-3373(13)00581-X DE-627 ger DE-627 rakwb eng 540 540 DE-600 570 VZ BIODIV DE-30 fid PHARM DE-84 fid 44.00 bkl Jin, Ruiben verfasserin aut The role of cerium in the improved SO2 tolerance for NO reduction with NH3 over Mn-Ce/TiO2 catalyst at low temperature 2014transfer abstract 7 nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier Abstract Manganese-based catalysts have shown excellent low-temperature selective catalytic reduction (SCR) activity for NO x removal. However, they all suffer from the serious SO2 poisoning effect on activity. Ceria modification has been reported to be able to promote SO2 tolerance of SCR catalysts probably via the inhibition of surface sulfate species formation. In this study, in situ diffuse reflectance infrared transform spectroscopy (DRIFT) investigations were carried out to determine the role of Ceria in the improved resistance for a Ce-modified Mn/TiO2 catalyst. The results indicated that after the introduction of Ce, SO x ad-species preferentially formed on Ceria as bulk-like sulfate species and lessened the sulfation of the main active phase (MnO x ) during low-temperature SCR processes in the presence of SO2. Furthermore, the DRIFT and TG–DSC results also implied that Ce modification could reduce thermal stabilities of the sulfate species covered on catalyst surface, thereby promoting its decomposition. Both of these would be beneficial to the improved SO2 tolerance of Ce modified catalysts. Abstract Manganese-based catalysts have shown excellent low-temperature selective catalytic reduction (SCR) activity for NO x removal. However, they all suffer from the serious SO2 poisoning effect on activity. Ceria modification has been reported to be able to promote SO2 tolerance of SCR catalysts probably via the inhibition of surface sulfate species formation. In this study, in situ diffuse reflectance infrared transform spectroscopy (DRIFT) investigations were carried out to determine the role of Ceria in the improved resistance for a Ce-modified Mn/TiO2 catalyst. The results indicated that after the introduction of Ce, SO x ad-species preferentially formed on Ceria as bulk-like sulfate species and lessened the sulfation of the main active phase (MnO x ) during low-temperature SCR processes in the presence of SO2. Furthermore, the DRIFT and TG–DSC results also implied that Ce modification could reduce thermal stabilities of the sulfate species covered on catalyst surface, thereby promoting its decomposition. Both of these would be beneficial to the improved SO2 tolerance of Ce modified catalysts. SCR Elsevier Low-temperature Elsevier Nitrogen oxides Elsevier SO2 tolerance Elsevier DRIFT Elsevier Liu, Yue oth Wang, Yan oth Cen, Wanglai oth Wu, Zhongbiao oth Wang, Haiqiang oth Weng, Xiaole oth Enthalten in Elsevier Beri, Suresh ELSEVIER Comparability studies of hemin from two different origins porcine and bovine in the production of 2020 an international journal devoted to catalytic science and its applications Amsterdam (DE-627)ELV004775082 volume:148 year:2014 day:27 month:04 pages:582-588 extent:7 https://doi.org/10.1016/j.apcatb.2013.09.016 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U FID-BIODIV FID-PHARM SSG-OLC-PHA SSG-OPC-PHA 44.00 Medizin: Allgemeines VZ AR 148 2014 27 0427 582-588 7 045F 540 |
allfieldsSound |
10.1016/j.apcatb.2013.09.016 doi GBVA2014015000014.pica (DE-627)ELV017680360 (ELSEVIER)S0926-3373(13)00581-X DE-627 ger DE-627 rakwb eng 540 540 DE-600 570 VZ BIODIV DE-30 fid PHARM DE-84 fid 44.00 bkl Jin, Ruiben verfasserin aut The role of cerium in the improved SO2 tolerance for NO reduction with NH3 over Mn-Ce/TiO2 catalyst at low temperature 2014transfer abstract 7 nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier Abstract Manganese-based catalysts have shown excellent low-temperature selective catalytic reduction (SCR) activity for NO x removal. However, they all suffer from the serious SO2 poisoning effect on activity. Ceria modification has been reported to be able to promote SO2 tolerance of SCR catalysts probably via the inhibition of surface sulfate species formation. In this study, in situ diffuse reflectance infrared transform spectroscopy (DRIFT) investigations were carried out to determine the role of Ceria in the improved resistance for a Ce-modified Mn/TiO2 catalyst. The results indicated that after the introduction of Ce, SO x ad-species preferentially formed on Ceria as bulk-like sulfate species and lessened the sulfation of the main active phase (MnO x ) during low-temperature SCR processes in the presence of SO2. Furthermore, the DRIFT and TG–DSC results also implied that Ce modification could reduce thermal stabilities of the sulfate species covered on catalyst surface, thereby promoting its decomposition. Both of these would be beneficial to the improved SO2 tolerance of Ce modified catalysts. Abstract Manganese-based catalysts have shown excellent low-temperature selective catalytic reduction (SCR) activity for NO x removal. However, they all suffer from the serious SO2 poisoning effect on activity. Ceria modification has been reported to be able to promote SO2 tolerance of SCR catalysts probably via the inhibition of surface sulfate species formation. In this study, in situ diffuse reflectance infrared transform spectroscopy (DRIFT) investigations were carried out to determine the role of Ceria in the improved resistance for a Ce-modified Mn/TiO2 catalyst. The results indicated that after the introduction of Ce, SO x ad-species preferentially formed on Ceria as bulk-like sulfate species and lessened the sulfation of the main active phase (MnO x ) during low-temperature SCR processes in the presence of SO2. Furthermore, the DRIFT and TG–DSC results also implied that Ce modification could reduce thermal stabilities of the sulfate species covered on catalyst surface, thereby promoting its decomposition. Both of these would be beneficial to the improved SO2 tolerance of Ce modified catalysts. SCR Elsevier Low-temperature Elsevier Nitrogen oxides Elsevier SO2 tolerance Elsevier DRIFT Elsevier Liu, Yue oth Wang, Yan oth Cen, Wanglai oth Wu, Zhongbiao oth Wang, Haiqiang oth Weng, Xiaole oth Enthalten in Elsevier Beri, Suresh ELSEVIER Comparability studies of hemin from two different origins porcine and bovine in the production of 2020 an international journal devoted to catalytic science and its applications Amsterdam (DE-627)ELV004775082 volume:148 year:2014 day:27 month:04 pages:582-588 extent:7 https://doi.org/10.1016/j.apcatb.2013.09.016 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U FID-BIODIV FID-PHARM SSG-OLC-PHA SSG-OPC-PHA 44.00 Medizin: Allgemeines VZ AR 148 2014 27 0427 582-588 7 045F 540 |
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However, they all suffer from the serious SO2 poisoning effect on activity. Ceria modification has been reported to be able to promote SO2 tolerance of SCR catalysts probably via the inhibition of surface sulfate species formation. In this study, in situ diffuse reflectance infrared transform spectroscopy (DRIFT) investigations were carried out to determine the role of Ceria in the improved resistance for a Ce-modified Mn/TiO2 catalyst. The results indicated that after the introduction of Ce, SO x ad-species preferentially formed on Ceria as bulk-like sulfate species and lessened the sulfation of the main active phase (MnO x ) during low-temperature SCR processes in the presence of SO2. Furthermore, the DRIFT and TG–DSC results also implied that Ce modification could reduce thermal stabilities of the sulfate species covered on catalyst surface, thereby promoting its decomposition. Both of these would be beneficial to the improved SO2 tolerance of Ce modified catalysts.</subfield></datafield><datafield tag="520" ind1=" " ind2=" "><subfield code="a">Abstract Manganese-based catalysts have shown excellent low-temperature selective catalytic reduction (SCR) activity for NO x removal. However, they all suffer from the serious SO2 poisoning effect on activity. Ceria modification has been reported to be able to promote SO2 tolerance of SCR catalysts probably via the inhibition of surface sulfate species formation. In this study, in situ diffuse reflectance infrared transform spectroscopy (DRIFT) investigations were carried out to determine the role of Ceria in the improved resistance for a Ce-modified Mn/TiO2 catalyst. 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role of cerium in the improved so2 tolerance for no reduction with nh3 over mn-ce/tio2 catalyst at low temperature |
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The role of cerium in the improved SO2 tolerance for NO reduction with NH3 over Mn-Ce/TiO2 catalyst at low temperature |
abstract |
Abstract Manganese-based catalysts have shown excellent low-temperature selective catalytic reduction (SCR) activity for NO x removal. However, they all suffer from the serious SO2 poisoning effect on activity. Ceria modification has been reported to be able to promote SO2 tolerance of SCR catalysts probably via the inhibition of surface sulfate species formation. In this study, in situ diffuse reflectance infrared transform spectroscopy (DRIFT) investigations were carried out to determine the role of Ceria in the improved resistance for a Ce-modified Mn/TiO2 catalyst. The results indicated that after the introduction of Ce, SO x ad-species preferentially formed on Ceria as bulk-like sulfate species and lessened the sulfation of the main active phase (MnO x ) during low-temperature SCR processes in the presence of SO2. Furthermore, the DRIFT and TG–DSC results also implied that Ce modification could reduce thermal stabilities of the sulfate species covered on catalyst surface, thereby promoting its decomposition. Both of these would be beneficial to the improved SO2 tolerance of Ce modified catalysts. |
abstractGer |
Abstract Manganese-based catalysts have shown excellent low-temperature selective catalytic reduction (SCR) activity for NO x removal. However, they all suffer from the serious SO2 poisoning effect on activity. Ceria modification has been reported to be able to promote SO2 tolerance of SCR catalysts probably via the inhibition of surface sulfate species formation. In this study, in situ diffuse reflectance infrared transform spectroscopy (DRIFT) investigations were carried out to determine the role of Ceria in the improved resistance for a Ce-modified Mn/TiO2 catalyst. The results indicated that after the introduction of Ce, SO x ad-species preferentially formed on Ceria as bulk-like sulfate species and lessened the sulfation of the main active phase (MnO x ) during low-temperature SCR processes in the presence of SO2. Furthermore, the DRIFT and TG–DSC results also implied that Ce modification could reduce thermal stabilities of the sulfate species covered on catalyst surface, thereby promoting its decomposition. Both of these would be beneficial to the improved SO2 tolerance of Ce modified catalysts. |
abstract_unstemmed |
Abstract Manganese-based catalysts have shown excellent low-temperature selective catalytic reduction (SCR) activity for NO x removal. However, they all suffer from the serious SO2 poisoning effect on activity. Ceria modification has been reported to be able to promote SO2 tolerance of SCR catalysts probably via the inhibition of surface sulfate species formation. In this study, in situ diffuse reflectance infrared transform spectroscopy (DRIFT) investigations were carried out to determine the role of Ceria in the improved resistance for a Ce-modified Mn/TiO2 catalyst. The results indicated that after the introduction of Ce, SO x ad-species preferentially formed on Ceria as bulk-like sulfate species and lessened the sulfation of the main active phase (MnO x ) during low-temperature SCR processes in the presence of SO2. Furthermore, the DRIFT and TG–DSC results also implied that Ce modification could reduce thermal stabilities of the sulfate species covered on catalyst surface, thereby promoting its decomposition. Both of these would be beneficial to the improved SO2 tolerance of Ce modified catalysts. |
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The role of cerium in the improved SO2 tolerance for NO reduction with NH3 over Mn-Ce/TiO2 catalyst at low temperature |
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