MnOx-CeO2 mixed oxides prepared by co-precipitation for selective catalytic reduction of NO with NH3 at low temperatures

Qi, Gongshin; Yang, Ralph T.; Chang, Ramsay

doi:10.1016/j.apcatb.2004.01.023

Cited by 991 publications

(428 citation statements)

References 55 publications

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“…Manganese oxides usually show good SCR activity in the low temperature range, such as pure MnO x [7,8], MnO x loaded on TiO 2 / Al 2 O 3 /SiO 2 /AC (activated carbon) [9][10][11][12] and Mn-Ce, Mn-Cu mixed oxides [13][14][15]. Previous studies showed that in Fecontaining SCR catalysts, the introduction of Mn could obviously enhance the low temperature activity [16,17], probably due to the synergistic effect between iron and manganese species.…”

Section: Introductionmentioning

confidence: 99%

Effect of manganese substitution on the structure and activity of iron titanate catalyst for the selective catalytic reduction of NO with NH3

Liu

Ding

et al. 2009

Applied Catalysis B: Environmental

606

355

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Section: Introductionmentioning

confidence: 99%

Effect of manganese substitution on the structure and activity of iron titanate catalyst for the selective catalytic reduction of NO with NH3

Liu

Ding

et al. 2009

Applied Catalysis B: Environmental

606

355

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“…Mixed oxide materials are active for oxidation-reduction reactions and combustion processes. For example, cobalt-zinc manganites, manganese-CeO 2 mixed oxides and Co-containing mixed oxides prepared from hydrotalcite-like precursors were active catalysts in the reduction of nitrous oxide [7][8][9]. Also, Co-Mn mixed oxides were found to be active catalysts for oxidation of ethanol [10] and conversion of synthesis gas to light olefins [11].…”

Section: Introductionmentioning

confidence: 98%

The influence of La2O3-doping on structural, surface and catalytic properties of nano-sized cobalt–manganese mixed oxides

Badawy

Ibrahim

2016

Int J Ind Chem

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Structural, textural and catalytic activity of CoO-Mn 2 O 3 system as being influenced by La 2 O 3 -doping (0.75-3 mol%) and calcination temperatures (300-500°C) were investigated. The techniques employed were XRD, N 2 -adsorption-desoprtion at -196°C, EDX and catalysis of H 2 O 2 -decomposition in aqueous solution at 30-50°C. The results revealed that the investigated system consisted of nano-sized Co 2 MnO 4 as a major phase together with unreacted portion of Co 3 O 4 and c-Mn 3 O 4 . Doping with the smallest amount of La 2 O 3 greatly increased the surface molar ratio of Mn/Co (88 %) for the solid calcined at 500°C with subsequent increase of the catalytic activity more than 12-fold for solids calcined at 500°C. The increase of La 2 O 3 -dopant above 0.75 mol% decreased progressively the surface molar ratio of Mn/Co with subsequent decrease in the catalytic activity which still measured higher values than that measured for the un-doped catalyst.

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“…Qi et al successfully prepared Mn-Fe-Ce mixed oxides that performed well under 100 ppm SO2 and 2.5% H2O condition ( Figure 13) [35]. The NO conversion over Mn-Fe-Ce decreased from 98 to 95% in 3 h in the presence of SO2 and H2O and then restored quickly to its original level after the supply of SO2 and H2O was cut off.…”

Section: Mn-based Ternary Metal Oxide Catalystsmentioning

confidence: 99%

Sulfur and Water Resistance of Mn-Based Catalysts for Low-Temperature Selective Catalytic Reduction of NOx: A Review

et al. 2018

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Selective catalytic reduction (SCR) with NH 3 is the most efficient and economic flue gas denitrification technology developed to date. Due to its high low-temperature catalytic activity, Mn-based catalysts present a great prospect for application in SCR de-NO x at low temperatures. However, overcoming the poor resistance of Mn-based catalysts to H 2 O and SO 2 poison is still a challenge. This paper reviews the recent progress on the H 2 O and SO 2 resistance of Mn-based catalysts for the low-temperature SCR of NO x . Firstly, the poison mechanisms of H 2 O and SO 2 are introduced in detail, respectively. Secondly, Mn-based catalysts are divided into three categories-single MnO x catalysts, Mn-based multi-metal oxide catalysts, and Mn-based supported catalysts-to review the research progress of Mn-based catalysts for H 2 O and SO 2 resistance. Thirdly, several strategies to reduce the poisonous effects of H 2 O and SO 2 , such as metal modification, proper support, the combination of metal modification and support, the rational design of structure and morphology, are summarized. Finally, perspectives and future directions of Mn-based catalysts for the low-temperature SCR of NO x are proposed.

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MnOx-CeO2 mixed oxides prepared by co-precipitation for selective catalytic reduction of NO with NH3 at low temperatures

Cited by 991 publications

References 55 publications

Effect of manganese substitution on the structure and activity of iron titanate catalyst for the selective catalytic reduction of NO with NH3

Effect of manganese substitution on the structure and activity of iron titanate catalyst for the selective catalytic reduction of NO with NH3

The influence of La2O3-doping on structural, surface and catalytic properties of nano-sized cobalt–manganese mixed oxides

Sulfur and Water Resistance of Mn-Based Catalysts for Low-Temperature Selective Catalytic Reduction of NOx: A Review

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