Novel shielding and synergy effects of Mn-Ce oxides confined in mesoporous zeolite for low temperature selective catalytic reduction of NOx with enhanced SO2/H2O tolerance

Yan, Ran; Lin, Sixue; Lü, Yonglong; Liu, Wenming; Mi, Yangyang; Tang, Changjin; Wang, Liang; Wu, Peng; Peng, Honggen

doi:10.1016/j.jhazmat.2020.122592

Cited by 98 publications

(22 citation statements)

References 74 publications

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“…Fan 89 found that the inhibition function of cerium-based catalysts was more evident at low temperatures, and the higher the H 2 O content, the more seriously the activity decreased. Li et al 90 prepared the Mn-Ce/TiO 2 catalyst and then tested the H 2 O resistance. The results showed that 10% H 2 O had little effect, with NO conversion remaining at about 95% in 20 h. Moreover, this was proved as a reversible reaction.…”

Section: Mechanism Of H 2 O Tolerance Of Cerium-based Catalysts For Selective Catalytic Reduction With Nhmentioning

confidence: 99%

Recent advances and perspectives in the resistance of SO₂ and H₂O of cerium-based catalysts for NO_x selective catalytic reduction with ammonia

Zhang

Zou

et al. 2022

New J. Chem.

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Section: Mechanism Of H 2 O Tolerance Of Cerium-based Catalysts For Selective Catalytic Reduction With Nhmentioning

confidence: 99%

Recent advances and perspectives in the resistance of SO₂ and H₂O of cerium-based catalysts for NO_x selective catalytic reduction with ammonia

Zhang

Zou

et al. 2022

New J. Chem.

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“…Furthermore, MnO x -CeO 2 binary oxide catalysts have attracted much attention due to their high NOx removal efficiency at temperatures below 250 °C. This is based on the oxygen storage capacity and redox properties of CeO 2 , that is, the redox properties between Ce 4+ and Ce 3+ to store or release oxygen ( Yan et al, 2020 ). Liu et al ( Pu et al, 2020 ) synthesized a series of Mn-Ti oxide catalysts by sol-gel, and investigated the effect of different synthesis conditions on catalyst performance.…”

Section: Research On Scr Denitration Catalyst At Wide Temperaturementioning

confidence: 99%

Progress of selective catalytic reduction denitrification catalysts at wide temperature in carbon neutralization

et al. 2022

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With the looming goal of carbon neutrality and increasingly stringent environmental protection policies, gas purification in coal-fired power plants is becoming more and more intense. To achieve the NOx emission standard when coal-fired power plants are operating at full load, wide-temperature denitrification catalysts that can operate for a long time in the range of 260–420°C are worthy of study. This review focuses on the research progress and deactivation mechanism of selective catalytic reduction (SCR) denitration catalysts applied to a wide temperature range. With the increasing application of SCR catalysts, it also means that a large amount of spent catalysts is generated every year due to deactivation. Therefore, it is necessary to recycle the wide temperature SCR denitration catalyst. The challenges faced by wide-temperature SCR denitration catalysts are summarized by comparing their regeneration processes. Finally, its future development is prospected.

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“…在ZSM-5分子筛中, 合成了MnCeO x @ZSM-5核壳结构 Du等人 [85] Qiu等人 [86] 对Mn-Co-Ce/TiO 图 10 MnCeO x @ZSM-5核壳结构催化剂 [79] (网络版彩图)…”

Section: 催化剂的核-壳结构unclassified

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

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Novel shielding and synergy effects of Mn-Ce oxides confined in mesoporous zeolite for low temperature selective catalytic reduction of NOx with enhanced SO2/H2O tolerance

Cited by 98 publications

References 74 publications

Recent advances and perspectives in the resistance of SO₂ and H₂O of cerium-based catalysts for NO_x selective catalytic reduction with ammonia

Recent advances and perspectives in the resistance of SO₂ and H₂O of cerium-based catalysts for NO_x selective catalytic reduction with ammonia

Progress of selective catalytic reduction denitrification catalysts at wide temperature in carbon neutralization

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

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Novel shielding and synergy effects of Mn-Ce oxides confined in mesoporous zeolite for low temperature selective catalytic reduction of NOx with enhanced SO2/H2O tolerance

Cited by 98 publications

References 74 publications

Recent advances and perspectives in the resistance of SO2 and H2O of cerium-based catalysts for NOx selective catalytic reduction with ammonia

Recent advances and perspectives in the resistance of SO2 and H2O of cerium-based catalysts for NOx selective catalytic reduction with ammonia

Progress of selective catalytic reduction denitrification catalysts at wide temperature in carbon neutralization

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

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Recent advances and perspectives in the resistance of SO₂ and H₂O of cerium-based catalysts for NO_x selective catalytic reduction with ammonia

Recent advances and perspectives in the resistance of SO₂ and H₂O of cerium-based catalysts for NO_x selective catalytic reduction with ammonia

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