NOx Removal by Selective Catalytic Reduction with Ammonia over a Hydrotalcite-Derived NiFe Mixed Oxide

A series of NiFe mixed oxide catalysts were prepared via calcining hydrotalcite-like precursors for the selective catalytic reduction of nitrogen oxides (NOx) with NH3 (NH3-SCR). Multiple characterizations revealed that catalytic performance was highly dependent on the phase composition, which was v...

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Main Authors:	Ruonan Wang, Xu Wu, Chunlei Zou, Xiaojian Li, Yali Du
Format:	Article
Language:	English
Published:	MDPI AG 2018-09-01
Series:	Catalysts
Subjects:	NiFe-LDH mixed oxide NiFe2O4 spinel NOx NH3-SCR
Online Access:	http://www.mdpi.com/2073-4344/8/9/384

id	doaj-08b018eac6874c9881caa2fe7d61f6a2
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spelling	doaj-08b018eac6874c9881caa2fe7d61f6a22020-11-25T00:38:49ZengMDPI AGCatalysts2073-43442018-09-018938410.3390/catal8090384catal8090384NOx Removal by Selective Catalytic Reduction with Ammonia over a Hydrotalcite-Derived NiFe Mixed OxideRuonan Wang0Xu Wu1Chunlei Zou2Xiaojian Li3Yali Du4College of chemistry and Chemical Engineering, Taiyuan University of Technology, Taiyuan 030024, ChinaCollege of chemistry and Chemical Engineering, Taiyuan University of Technology, Taiyuan 030024, ChinaCollege of chemistry and Chemical Engineering, Taiyuan University of Technology, Taiyuan 030024, ChinaCollege of chemistry and Chemical Engineering, Taiyuan University of Technology, Taiyuan 030024, ChinaCollege of Chemistry and Chemical Engineering, Jinzhong University, Jinzhong 030619, ChinaA series of NiFe mixed oxide catalysts were prepared via calcining hydrotalcite-like precursors for the selective catalytic reduction of nitrogen oxides (NOx) with NH3 (NH3-SCR). Multiple characterizations revealed that catalytic performance was highly dependent on the phase composition, which was vulnerable to the calcination temperature. The MOx phase (M = Ni or Fe) formed at a lower calcination temperature would induce more favorable contents of Fe2+ and Ni3+ and as a result contribute to the better redox capacity and low-temperature activity. In comparison, NiFe2O4 phase emerged at a higher calcination temperature, which was expected to generate more Fe species on the surface and lead to a stable structure, better high-temperature activity, preferable SO2 resistance, and catalytic stability. The optimum NiFe-500 catalyst incorporated the above virtues and afforded excellent denitration (DeNOx) activity (over 85% NOx conversion with nearly 98% N2 selectivity in the region of 210–360 °C), superior SO2 resistance, and catalytic stability.http://www.mdpi.com/2073-4344/8/9/384NiFe-LDHmixed oxideNiFe2O4 spinelNOxNH3-SCR
collection	DOAJ
language	English
format	Article
sources	DOAJ
author	Ruonan Wang Xu Wu Chunlei Zou Xiaojian Li Yali Du
spellingShingle	Ruonan Wang Xu Wu Chunlei Zou Xiaojian Li Yali Du NOx Removal by Selective Catalytic Reduction with Ammonia over a Hydrotalcite-Derived NiFe Mixed Oxide Catalysts NiFe-LDH mixed oxide NiFe2O4 spinel NOx NH3-SCR
author_facet	Ruonan Wang Xu Wu Chunlei Zou Xiaojian Li Yali Du
author_sort	Ruonan Wang
title	NOx Removal by Selective Catalytic Reduction with Ammonia over a Hydrotalcite-Derived NiFe Mixed Oxide
title_short	NOx Removal by Selective Catalytic Reduction with Ammonia over a Hydrotalcite-Derived NiFe Mixed Oxide
title_full	NOx Removal by Selective Catalytic Reduction with Ammonia over a Hydrotalcite-Derived NiFe Mixed Oxide
title_fullStr	NOx Removal by Selective Catalytic Reduction with Ammonia over a Hydrotalcite-Derived NiFe Mixed Oxide
title_full_unstemmed	NOx Removal by Selective Catalytic Reduction with Ammonia over a Hydrotalcite-Derived NiFe Mixed Oxide
title_sort	nox removal by selective catalytic reduction with ammonia over a hydrotalcite-derived nife mixed oxide
publisher	MDPI AG
series	Catalysts
issn	2073-4344
publishDate	2018-09-01
description	A series of NiFe mixed oxide catalysts were prepared via calcining hydrotalcite-like precursors for the selective catalytic reduction of nitrogen oxides (NOx) with NH3 (NH3-SCR). Multiple characterizations revealed that catalytic performance was highly dependent on the phase composition, which was vulnerable to the calcination temperature. The MOx phase (M = Ni or Fe) formed at a lower calcination temperature would induce more favorable contents of Fe2+ and Ni3+ and as a result contribute to the better redox capacity and low-temperature activity. In comparison, NiFe2O4 phase emerged at a higher calcination temperature, which was expected to generate more Fe species on the surface and lead to a stable structure, better high-temperature activity, preferable SO2 resistance, and catalytic stability. The optimum NiFe-500 catalyst incorporated the above virtues and afforded excellent denitration (DeNOx) activity (over 85% NOx conversion with nearly 98% N2 selectivity in the region of 210–360 °C), superior SO2 resistance, and catalytic stability.
topic	NiFe-LDH mixed oxide NiFe2O4 spinel NOx NH3-SCR
url	http://www.mdpi.com/2073-4344/8/9/384
work_keys_str_mv	AT ruonanwang noxremovalbyselectivecatalyticreductionwithammoniaoverahydrotalcitederivednifemixedoxide AT xuwu noxremovalbyselectivecatalyticreductionwithammoniaoverahydrotalcitederivednifemixedoxide AT chunleizou noxremovalbyselectivecatalyticreductionwithammoniaoverahydrotalcitederivednifemixedoxide AT xiaojianli noxremovalbyselectivecatalyticreductionwithammoniaoverahydrotalcitederivednifemixedoxide AT yalidu noxremovalbyselectivecatalyticreductionwithammoniaoverahydrotalcitederivednifemixedoxide
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NOx Removal by Selective Catalytic Reduction with Ammonia over a Hydrotalcite-Derived NiFe Mixed Oxide

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