Low-Temperature NH<sub<3</sub<-SCR Performance and In Situ DRIFTS Study on Zeolite X-Supported Different Crystal Phases of MnO<sub<2</sub< Catalysts

In this study, a series of zeolite-X-supported different crystal phases of MnO<sub<2</sub< (α-MnO<sub<2</sub<, β-MnO<sub<2</sub<, γ-MnO<sub<2</sub<, and σ-MnO<sub<2</sub<) catalysts were prepared via a solid-state diffusion method and high-...
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Autor*in:	Lin Chen [verfasserIn] Shan Ren [verfasserIn] Tao Chen [verfasserIn] Xiaodi Li [verfasserIn] Mingming Wang [verfasserIn] Zhichao Chen [verfasserIn] Qingcai Liu [verfasserIn]

Format:	E-Artikel
Sprache:	Englisch

Erschienen:	2023

Schlagwörter:	zeolite X different crystal phases of MnO low-temperature NH NH

Übergeordnetes Werk:	In: Catalysts - MDPI AG, 2012, 13(2023), 4, p 682
Übergeordnetes Werk:	volume:13 ; year:2023 ; number:4, p 682

Links:	Link aufrufen Link aufrufen Link aufrufen Journal toc

DOI / URN:	10.3390/catal13040682

Katalog-ID:	DOAJ089886755

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allfields	10.3390/catal13040682 doi (DE-627)DOAJ089886755 (DE-599)DOAJadeda19af9784f6884b86b53a846d1d2 DE-627 ger DE-627 rakwb eng TP1-1185 QD1-999 Lin Chen verfasserin aut Low-Temperature NH<sub<3</sub<-SCR Performance and In Situ DRIFTS Study on Zeolite X-Supported Different Crystal Phases of MnO<sub<2</sub< Catalysts 2023 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier In this study, a series of zeolite-X-supported different crystal phases of MnO<sub<2</sub< (α-MnO<sub<2</sub<, β-MnO<sub<2</sub<, γ-MnO<sub<2</sub<, and σ-MnO<sub<2</sub<) catalysts were prepared via a solid-state diffusion method and high-heat treatment method to explore their low-temperature NH<sub<3</sub<-SCR performance. All of the catalysts featured typical octahedral zeolite X structures and manganese dioxides species of various crystal types dispersed across the support surface. Throughout the entire temperature range of the reaction, γ-MnO<sub<2</sub</X catalyst had the highest NO conversion. Additionally, β-MnO<sub<2</sub</X, γ-MnO<sub<2</sub</X, and σ-MnO<sub<2</sub</X catalysts had nearly 100% of N<sub<2</sub< selectivity, whereas the α-MnO<sub<2</sub</X catalyst had the lowest N<sub<2</sub< selectivity (about 90%) below 125 °C. Moreover, the γ-MnO<sub<2</sub</X catalyst demonstrated superior acidity capacity and reduction ability compared with the other three catalysts. All the catalysts contained the essential intermediates NH<sub<2</sub<NO and NH<sub<4</sub<NO<sub<3</sub< species, which are essential to the SCR reaction. More acid sites and nitrate species existed on the γ-MnO<sub<2</sub</X catalyst than on the other catalysts, thereby boosting the SCR reaction. zeolite X different crystal phases of MnO<sub<2</sub< low-temperature NH<sub<3</sub<-SCR NH<sub<2</sub<NO and NH<sub<4</sub<NO<sub<3</sub< intermediates Chemical technology Chemistry Shan Ren verfasserin aut Tao Chen verfasserin aut Xiaodi Li verfasserin aut Mingming Wang verfasserin aut Zhichao Chen verfasserin aut Qingcai Liu verfasserin aut In Catalysts MDPI AG, 2012 13(2023), 4, p 682 (DE-627)71862646X (DE-600)2662126-5 20734344 nnns volume:13 year:2023 number:4, p 682 https://doi.org/10.3390/catal13040682 kostenfrei https://doaj.org/article/adeda19af9784f6884b86b53a846d1d2 kostenfrei https://www.mdpi.com/2073-4344/13/4/682 kostenfrei https://doaj.org/toc/2073-4344 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_206 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_602 GBV_ILN_2005 GBV_ILN_2009 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2055 GBV_ILN_2111 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 13 2023 4, p 682
spelling	10.3390/catal13040682 doi (DE-627)DOAJ089886755 (DE-599)DOAJadeda19af9784f6884b86b53a846d1d2 DE-627 ger DE-627 rakwb eng TP1-1185 QD1-999 Lin Chen verfasserin aut Low-Temperature NH<sub<3</sub<-SCR Performance and In Situ DRIFTS Study on Zeolite X-Supported Different Crystal Phases of MnO<sub<2</sub< Catalysts 2023 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier In this study, a series of zeolite-X-supported different crystal phases of MnO<sub<2</sub< (α-MnO<sub<2</sub<, β-MnO<sub<2</sub<, γ-MnO<sub<2</sub<, and σ-MnO<sub<2</sub<) catalysts were prepared via a solid-state diffusion method and high-heat treatment method to explore their low-temperature NH<sub<3</sub<-SCR performance. All of the catalysts featured typical octahedral zeolite X structures and manganese dioxides species of various crystal types dispersed across the support surface. Throughout the entire temperature range of the reaction, γ-MnO<sub<2</sub</X catalyst had the highest NO conversion. Additionally, β-MnO<sub<2</sub</X, γ-MnO<sub<2</sub</X, and σ-MnO<sub<2</sub</X catalysts had nearly 100% of N<sub<2</sub< selectivity, whereas the α-MnO<sub<2</sub</X catalyst had the lowest N<sub<2</sub< selectivity (about 90%) below 125 °C. Moreover, the γ-MnO<sub<2</sub</X catalyst demonstrated superior acidity capacity and reduction ability compared with the other three catalysts. All the catalysts contained the essential intermediates NH<sub<2</sub<NO and NH<sub<4</sub<NO<sub<3</sub< species, which are essential to the SCR reaction. More acid sites and nitrate species existed on the γ-MnO<sub<2</sub</X catalyst than on the other catalysts, thereby boosting the SCR reaction. zeolite X different crystal phases of MnO<sub<2</sub< low-temperature NH<sub<3</sub<-SCR NH<sub<2</sub<NO and NH<sub<4</sub<NO<sub<3</sub< intermediates Chemical technology Chemistry Shan Ren verfasserin aut Tao Chen verfasserin aut Xiaodi Li verfasserin aut Mingming Wang verfasserin aut Zhichao Chen verfasserin aut Qingcai Liu verfasserin aut In Catalysts MDPI AG, 2012 13(2023), 4, p 682 (DE-627)71862646X (DE-600)2662126-5 20734344 nnns volume:13 year:2023 number:4, p 682 https://doi.org/10.3390/catal13040682 kostenfrei https://doaj.org/article/adeda19af9784f6884b86b53a846d1d2 kostenfrei https://www.mdpi.com/2073-4344/13/4/682 kostenfrei https://doaj.org/toc/2073-4344 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_206 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_602 GBV_ILN_2005 GBV_ILN_2009 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2055 GBV_ILN_2111 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 13 2023 4, p 682
allfields_unstemmed	10.3390/catal13040682 doi (DE-627)DOAJ089886755 (DE-599)DOAJadeda19af9784f6884b86b53a846d1d2 DE-627 ger DE-627 rakwb eng TP1-1185 QD1-999 Lin Chen verfasserin aut Low-Temperature NH<sub<3</sub<-SCR Performance and In Situ DRIFTS Study on Zeolite X-Supported Different Crystal Phases of MnO<sub<2</sub< Catalysts 2023 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier In this study, a series of zeolite-X-supported different crystal phases of MnO<sub<2</sub< (α-MnO<sub<2</sub<, β-MnO<sub<2</sub<, γ-MnO<sub<2</sub<, and σ-MnO<sub<2</sub<) catalysts were prepared via a solid-state diffusion method and high-heat treatment method to explore their low-temperature NH<sub<3</sub<-SCR performance. All of the catalysts featured typical octahedral zeolite X structures and manganese dioxides species of various crystal types dispersed across the support surface. Throughout the entire temperature range of the reaction, γ-MnO<sub<2</sub</X catalyst had the highest NO conversion. Additionally, β-MnO<sub<2</sub</X, γ-MnO<sub<2</sub</X, and σ-MnO<sub<2</sub</X catalysts had nearly 100% of N<sub<2</sub< selectivity, whereas the α-MnO<sub<2</sub</X catalyst had the lowest N<sub<2</sub< selectivity (about 90%) below 125 °C. Moreover, the γ-MnO<sub<2</sub</X catalyst demonstrated superior acidity capacity and reduction ability compared with the other three catalysts. All the catalysts contained the essential intermediates NH<sub<2</sub<NO and NH<sub<4</sub<NO<sub<3</sub< species, which are essential to the SCR reaction. More acid sites and nitrate species existed on the γ-MnO<sub<2</sub</X catalyst than on the other catalysts, thereby boosting the SCR reaction. zeolite X different crystal phases of MnO<sub<2</sub< low-temperature NH<sub<3</sub<-SCR NH<sub<2</sub<NO and NH<sub<4</sub<NO<sub<3</sub< intermediates Chemical technology Chemistry Shan Ren verfasserin aut Tao Chen verfasserin aut Xiaodi Li verfasserin aut Mingming Wang verfasserin aut Zhichao Chen verfasserin aut Qingcai Liu verfasserin aut In Catalysts MDPI AG, 2012 13(2023), 4, p 682 (DE-627)71862646X (DE-600)2662126-5 20734344 nnns volume:13 year:2023 number:4, p 682 https://doi.org/10.3390/catal13040682 kostenfrei https://doaj.org/article/adeda19af9784f6884b86b53a846d1d2 kostenfrei https://www.mdpi.com/2073-4344/13/4/682 kostenfrei https://doaj.org/toc/2073-4344 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_206 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_602 GBV_ILN_2005 GBV_ILN_2009 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2055 GBV_ILN_2111 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 13 2023 4, p 682
allfieldsGer	10.3390/catal13040682 doi (DE-627)DOAJ089886755 (DE-599)DOAJadeda19af9784f6884b86b53a846d1d2 DE-627 ger DE-627 rakwb eng TP1-1185 QD1-999 Lin Chen verfasserin aut Low-Temperature NH<sub<3</sub<-SCR Performance and In Situ DRIFTS Study on Zeolite X-Supported Different Crystal Phases of MnO<sub<2</sub< Catalysts 2023 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier In this study, a series of zeolite-X-supported different crystal phases of MnO<sub<2</sub< (α-MnO<sub<2</sub<, β-MnO<sub<2</sub<, γ-MnO<sub<2</sub<, and σ-MnO<sub<2</sub<) catalysts were prepared via a solid-state diffusion method and high-heat treatment method to explore their low-temperature NH<sub<3</sub<-SCR performance. All of the catalysts featured typical octahedral zeolite X structures and manganese dioxides species of various crystal types dispersed across the support surface. Throughout the entire temperature range of the reaction, γ-MnO<sub<2</sub</X catalyst had the highest NO conversion. Additionally, β-MnO<sub<2</sub</X, γ-MnO<sub<2</sub</X, and σ-MnO<sub<2</sub</X catalysts had nearly 100% of N<sub<2</sub< selectivity, whereas the α-MnO<sub<2</sub</X catalyst had the lowest N<sub<2</sub< selectivity (about 90%) below 125 °C. Moreover, the γ-MnO<sub<2</sub</X catalyst demonstrated superior acidity capacity and reduction ability compared with the other three catalysts. All the catalysts contained the essential intermediates NH<sub<2</sub<NO and NH<sub<4</sub<NO<sub<3</sub< species, which are essential to the SCR reaction. More acid sites and nitrate species existed on the γ-MnO<sub<2</sub</X catalyst than on the other catalysts, thereby boosting the SCR reaction. zeolite X different crystal phases of MnO<sub<2</sub< low-temperature NH<sub<3</sub<-SCR NH<sub<2</sub<NO and NH<sub<4</sub<NO<sub<3</sub< intermediates Chemical technology Chemistry Shan Ren verfasserin aut Tao Chen verfasserin aut Xiaodi Li verfasserin aut Mingming Wang verfasserin aut Zhichao Chen verfasserin aut Qingcai Liu verfasserin aut In Catalysts MDPI AG, 2012 13(2023), 4, p 682 (DE-627)71862646X (DE-600)2662126-5 20734344 nnns volume:13 year:2023 number:4, p 682 https://doi.org/10.3390/catal13040682 kostenfrei https://doaj.org/article/adeda19af9784f6884b86b53a846d1d2 kostenfrei https://www.mdpi.com/2073-4344/13/4/682 kostenfrei https://doaj.org/toc/2073-4344 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_206 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_602 GBV_ILN_2005 GBV_ILN_2009 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2055 GBV_ILN_2111 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 13 2023 4, p 682
allfieldsSound	10.3390/catal13040682 doi (DE-627)DOAJ089886755 (DE-599)DOAJadeda19af9784f6884b86b53a846d1d2 DE-627 ger DE-627 rakwb eng TP1-1185 QD1-999 Lin Chen verfasserin aut Low-Temperature NH<sub<3</sub<-SCR Performance and In Situ DRIFTS Study on Zeolite X-Supported Different Crystal Phases of MnO<sub<2</sub< Catalysts 2023 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier In this study, a series of zeolite-X-supported different crystal phases of MnO<sub<2</sub< (α-MnO<sub<2</sub<, β-MnO<sub<2</sub<, γ-MnO<sub<2</sub<, and σ-MnO<sub<2</sub<) catalysts were prepared via a solid-state diffusion method and high-heat treatment method to explore their low-temperature NH<sub<3</sub<-SCR performance. All of the catalysts featured typical octahedral zeolite X structures and manganese dioxides species of various crystal types dispersed across the support surface. Throughout the entire temperature range of the reaction, γ-MnO<sub<2</sub</X catalyst had the highest NO conversion. Additionally, β-MnO<sub<2</sub</X, γ-MnO<sub<2</sub</X, and σ-MnO<sub<2</sub</X catalysts had nearly 100% of N<sub<2</sub< selectivity, whereas the α-MnO<sub<2</sub</X catalyst had the lowest N<sub<2</sub< selectivity (about 90%) below 125 °C. Moreover, the γ-MnO<sub<2</sub</X catalyst demonstrated superior acidity capacity and reduction ability compared with the other three catalysts. All the catalysts contained the essential intermediates NH<sub<2</sub<NO and NH<sub<4</sub<NO<sub<3</sub< species, which are essential to the SCR reaction. More acid sites and nitrate species existed on the γ-MnO<sub<2</sub</X catalyst than on the other catalysts, thereby boosting the SCR reaction. zeolite X different crystal phases of MnO<sub<2</sub< low-temperature NH<sub<3</sub<-SCR NH<sub<2</sub<NO and NH<sub<4</sub<NO<sub<3</sub< intermediates Chemical technology Chemistry Shan Ren verfasserin aut Tao Chen verfasserin aut Xiaodi Li verfasserin aut Mingming Wang verfasserin aut Zhichao Chen verfasserin aut Qingcai Liu verfasserin aut In Catalysts MDPI AG, 2012 13(2023), 4, p 682 (DE-627)71862646X (DE-600)2662126-5 20734344 nnns volume:13 year:2023 number:4, p 682 https://doi.org/10.3390/catal13040682 kostenfrei https://doaj.org/article/adeda19af9784f6884b86b53a846d1d2 kostenfrei https://www.mdpi.com/2073-4344/13/4/682 kostenfrei https://doaj.org/toc/2073-4344 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_206 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_602 GBV_ILN_2005 GBV_ILN_2009 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2055 GBV_ILN_2111 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 13 2023 4, p 682
language	English
source	In Catalysts 13(2023), 4, p 682 volume:13 year:2023 number:4, p 682
sourceStr	In Catalysts 13(2023), 4, p 682 volume:13 year:2023 number:4, p 682
format_phy_str_mv	Article
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topic_facet	zeolite X different crystal phases of MnO<sub<2</sub< low-temperature NH<sub<3</sub<-SCR NH<sub<2</sub<NO and NH<sub<4</sub<NO<sub<3</sub< intermediates Chemical technology Chemistry
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authorswithroles_txt_mv	Lin Chen @@aut@@ Shan Ren @@aut@@ Tao Chen @@aut@@ Xiaodi Li @@aut@@ Mingming Wang @@aut@@ Zhichao Chen @@aut@@ Qingcai Liu @@aut@@
publishDateDaySort_date	2023-01-01T00:00:00Z
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illustrated	Not Illustrated
issn	20734344
topic_title	TP1-1185 QD1-999 Low-Temperature NH<sub<3</sub<-SCR Performance and In Situ DRIFTS Study on Zeolite X-Supported Different Crystal Phases of MnO<sub<2</sub< Catalysts zeolite X different crystal phases of MnO<sub<2</sub< low-temperature NH<sub<3</sub<-SCR NH<sub<2</sub<NO and NH<sub<4</sub<NO<sub<3</sub< intermediates
topic	misc TP1-1185 misc QD1-999 misc zeolite X misc different crystal phases of MnO<sub<2</sub< misc low-temperature NH<sub<3</sub<-SCR misc NH<sub<2</sub<NO and NH<sub<4</sub<NO<sub<3</sub< intermediates misc Chemical technology misc Chemistry
topic_unstemmed	misc TP1-1185 misc QD1-999 misc zeolite X misc different crystal phases of MnO<sub<2</sub< misc low-temperature NH<sub<3</sub<-SCR misc NH<sub<2</sub<NO and NH<sub<4</sub<NO<sub<3</sub< intermediates misc Chemical technology misc Chemistry
topic_browse	misc TP1-1185 misc QD1-999 misc zeolite X misc different crystal phases of MnO<sub<2</sub< misc low-temperature NH<sub<3</sub<-SCR misc NH<sub<2</sub<NO and NH<sub<4</sub<NO<sub<3</sub< intermediates misc Chemical technology misc Chemistry
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hierarchy_parent_title	Catalysts
hierarchy_parent_id	71862646X
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title	Low-Temperature NH<sub<3</sub<-SCR Performance and In Situ DRIFTS Study on Zeolite X-Supported Different Crystal Phases of MnO<sub<2</sub< Catalysts
ctrlnum	(DE-627)DOAJ089886755 (DE-599)DOAJadeda19af9784f6884b86b53a846d1d2
title_full	Low-Temperature NH<sub<3</sub<-SCR Performance and In Situ DRIFTS Study on Zeolite X-Supported Different Crystal Phases of MnO<sub<2</sub< Catalysts
author_sort	Lin Chen
journal	Catalysts
journalStr	Catalysts
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lang_code	eng
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author_browse	Lin Chen Shan Ren Tao Chen Xiaodi Li Mingming Wang Zhichao Chen Qingcai Liu
container_volume	13
class	TP1-1185 QD1-999
format_se	Elektronische Aufsätze
author-letter	Lin Chen
doi_str_mv	10.3390/catal13040682
author2-role	verfasserin
title_sort	low-temperature nh<sub<3</sub<-scr performance and in situ drifts study on zeolite x-supported different crystal phases of mno<sub<2</sub< catalysts
callnumber	TP1-1185
title_auth	Low-Temperature NH<sub<3</sub<-SCR Performance and In Situ DRIFTS Study on Zeolite X-Supported Different Crystal Phases of MnO<sub<2</sub< Catalysts
abstract	In this study, a series of zeolite-X-supported different crystal phases of MnO<sub<2</sub< (α-MnO<sub<2</sub<, β-MnO<sub<2</sub<, γ-MnO<sub<2</sub<, and σ-MnO<sub<2</sub<) catalysts were prepared via a solid-state diffusion method and high-heat treatment method to explore their low-temperature NH<sub<3</sub<-SCR performance. All of the catalysts featured typical octahedral zeolite X structures and manganese dioxides species of various crystal types dispersed across the support surface. Throughout the entire temperature range of the reaction, γ-MnO<sub<2</sub</X catalyst had the highest NO conversion. Additionally, β-MnO<sub<2</sub</X, γ-MnO<sub<2</sub</X, and σ-MnO<sub<2</sub</X catalysts had nearly 100% of N<sub<2</sub< selectivity, whereas the α-MnO<sub<2</sub</X catalyst had the lowest N<sub<2</sub< selectivity (about 90%) below 125 °C. Moreover, the γ-MnO<sub<2</sub</X catalyst demonstrated superior acidity capacity and reduction ability compared with the other three catalysts. All the catalysts contained the essential intermediates NH<sub<2</sub<NO and NH<sub<4</sub<NO<sub<3</sub< species, which are essential to the SCR reaction. More acid sites and nitrate species existed on the γ-MnO<sub<2</sub</X catalyst than on the other catalysts, thereby boosting the SCR reaction.
abstractGer	In this study, a series of zeolite-X-supported different crystal phases of MnO<sub<2</sub< (α-MnO<sub<2</sub<, β-MnO<sub<2</sub<, γ-MnO<sub<2</sub<, and σ-MnO<sub<2</sub<) catalysts were prepared via a solid-state diffusion method and high-heat treatment method to explore their low-temperature NH<sub<3</sub<-SCR performance. All of the catalysts featured typical octahedral zeolite X structures and manganese dioxides species of various crystal types dispersed across the support surface. Throughout the entire temperature range of the reaction, γ-MnO<sub<2</sub</X catalyst had the highest NO conversion. Additionally, β-MnO<sub<2</sub</X, γ-MnO<sub<2</sub</X, and σ-MnO<sub<2</sub</X catalysts had nearly 100% of N<sub<2</sub< selectivity, whereas the α-MnO<sub<2</sub</X catalyst had the lowest N<sub<2</sub< selectivity (about 90%) below 125 °C. Moreover, the γ-MnO<sub<2</sub</X catalyst demonstrated superior acidity capacity and reduction ability compared with the other three catalysts. All the catalysts contained the essential intermediates NH<sub<2</sub<NO and NH<sub<4</sub<NO<sub<3</sub< species, which are essential to the SCR reaction. More acid sites and nitrate species existed on the γ-MnO<sub<2</sub</X catalyst than on the other catalysts, thereby boosting the SCR reaction.
abstract_unstemmed	In this study, a series of zeolite-X-supported different crystal phases of MnO<sub<2</sub< (α-MnO<sub<2</sub<, β-MnO<sub<2</sub<, γ-MnO<sub<2</sub<, and σ-MnO<sub<2</sub<) catalysts were prepared via a solid-state diffusion method and high-heat treatment method to explore their low-temperature NH<sub<3</sub<-SCR performance. All of the catalysts featured typical octahedral zeolite X structures and manganese dioxides species of various crystal types dispersed across the support surface. Throughout the entire temperature range of the reaction, γ-MnO<sub<2</sub</X catalyst had the highest NO conversion. Additionally, β-MnO<sub<2</sub</X, γ-MnO<sub<2</sub</X, and σ-MnO<sub<2</sub</X catalysts had nearly 100% of N<sub<2</sub< selectivity, whereas the α-MnO<sub<2</sub</X catalyst had the lowest N<sub<2</sub< selectivity (about 90%) below 125 °C. Moreover, the γ-MnO<sub<2</sub</X catalyst demonstrated superior acidity capacity and reduction ability compared with the other three catalysts. All the catalysts contained the essential intermediates NH<sub<2</sub<NO and NH<sub<4</sub<NO<sub<3</sub< species, which are essential to the SCR reaction. More acid sites and nitrate species existed on the γ-MnO<sub<2</sub</X catalyst than on the other catalysts, thereby boosting the SCR reaction.
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title_short	Low-Temperature NH<sub<3</sub<-SCR Performance and In Situ DRIFTS Study on Zeolite X-Supported Different Crystal Phases of MnO<sub<2</sub< Catalysts
url	https://doi.org/10.3390/catal13040682 https://doaj.org/article/adeda19af9784f6884b86b53a846d1d2 https://www.mdpi.com/2073-4344/13/4/682 https://doaj.org/toc/2073-4344
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author2	Shan Ren Tao Chen Xiaodi Li Mingming Wang Zhichao Chen Qingcai Liu
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doi_str	10.3390/catal13040682
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up_date	2024-07-04T01:03:50.025Z
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Low-Temperature NH<sub<3</sub<-SCR Performance and In Situ DRIFTS Study on Zeolite X-Supported Different Crystal Phases of MnO<sub<2</sub< Catalysts

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