Recent advances in the selective catalytic reduction of NO&amp;lt;sub&amp;gt;&amp;lt;italic&amp;gt;x&amp;lt;/italic&amp;gt;&amp;lt;/sub&amp;gt; by NH&amp;lt;sub&amp;gt;3&amp;lt;/sub&amp;gt; over small-pore zeolite catalysts

Zhou, Zizheng; Wang, Zhihua; Liu, Zhiming

doi:10.1360/n032017-00215

Sci. Sin.-Chim

2018

DOI: 10.1360/n032017-00215

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Recent advances in the selective catalytic reduction of NO<italic>x</italic> by NH3 over small-pore zeolite catalysts

Zizheng Zhou

Zhihua Wang

Zhiming Liu

Abstract: Insights into the selective catalytic reduction of NO by NH 3 over Mn 3 O 4 (110): a DFT study coupled with microkinetic analysis SCIENCE CHINA Chemistry 61, 457 (2018); Environmental-friendly catalysts for the selective catalytic reduction of NO x SCIENTIA SINICA Chimica 42, 446 (2012); Facile preparation of Fe-Y catalyst under water-free conditions for selective catalytic reduction of NO x by ammonia

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Research progress in the SO2 resistance of denitration catalysts in low-temperature NH3-SCR reactions

Liu¹,

He²,

Mao³

et al. 2022

Sci. Sin.-Chim

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NH 3 -SCR reaction is one of the most widely used denitration technologies at present, and the catalyst is the core of the NH 3 -SCR technology. Because of its low-temperature activity and easy deactivation in the presence of SO 2 , the research on the low-temperature sulfur-resistance of denitration catalysts becomes a hot spot. In this review, the deactivation mechanism of NH 3 -SCR catalysts in the presence of SO 2 is reviewed. It is found that the deactivation of the catalysts is mainly due to the reaction of SO 2 with NH 3 and metal-active sites; the formation of ammonium sulfates or ammonium bisulfates will block the pores of the catalysts and affect the efficiency of the catalysts; the metal sulfates will lead to the deactivation of the active sites of the catalysts and cause the irreversible deactivation of the catalysts; the competitive adsorption of SO 2 and NO will also cause the deactivation of the catalysts. Based on the known mechanism of catalyst deactivation, some effective strategies for improving the SO 2 tolerance are proposed: reducing the adsorption and oxidation of SO 2 , constructing sacrificial sites to protect active sites and promoting the decomposition of sulfates. It is found that the sulfur resistance of the catalysts can be improved by some methods: such as metal modification, the special structure of catalysts, the influence of supports, acid catalysts. Finally, the development prospect of lowtemperature sulfur-resistant NH 3 -SCR denitration catalysts is prospected.

show abstract

Research progress in the SO2 resistance of denitration catalysts in low-temperature NH3-SCR reactions

Liu¹,

He²,

Mao³

et al. 2022

Sci. Sin.-Chim

View full text Add to dashboard Cite

show abstract

Research progress in Fe-based molecular sieve NH3-SCR denitration catalyst

Cai,

An,

Wang

et al. 2024

Sci. Sin.-Chim

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Recent advances in the selective catalytic reduction of NO<sub><italic>x</italic></sub> by NH<sub>3</sub> over small-pore zeolite catalysts

Cited by 2 publications

References 32 publications

Research progress in the SO<sub>2</sub> resistance of denitration catalysts in low-temperature NH<sub>3</sub>-SCR reactions

Research progress in the SO<sub>2</sub> resistance of denitration catalysts in low-temperature NH<sub>3</sub>-SCR reactions

Research progress in Fe-based molecular sieve NH<sub>3</sub>-SCR denitration catalyst

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Recent advances in the selective catalytic reduction of NO&lt;sub&gt;&lt;italic&gt;x&lt;/italic&gt;&lt;/sub&gt; by NH&lt;sub&gt;3&lt;/sub&gt; over small-pore zeolite catalysts

Cited by 2 publications

References 32 publications

Research progress in the SO&lt;sub&gt;2&lt;/sub&gt; resistance of denitration catalysts in low-temperature NH&lt;sub&gt;3&lt;/sub&gt;-SCR reactions

Research progress in the SO&lt;sub&gt;2&lt;/sub&gt; resistance of denitration catalysts in low-temperature NH&lt;sub&gt;3&lt;/sub&gt;-SCR reactions

Research progress in Fe-based molecular sieve NH&lt;sub&gt;3&lt;/sub&gt;-SCR denitration catalyst

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Product

Resources

About

Recent advances in the selective catalytic reduction of NO<sub><italic>x</italic></sub> by NH<sub>3</sub> over small-pore zeolite catalysts

Research progress in the SO<sub>2</sub> resistance of denitration catalysts in low-temperature NH<sub>3</sub>-SCR reactions

Research progress in the SO<sub>2</sub> resistance of denitration catalysts in low-temperature NH<sub>3</sub>-SCR reactions

Research progress in Fe-based molecular sieve NH<sub>3</sub>-SCR denitration catalyst