MnO -CeO2 catalysts synthesized by solution combustion synthesis for the low-temperature NH3-SCR

Andreoli, Silvia; Deorsola, Fabio Alessandro; Pirone, Raffaele

doi:10.1016/j.cattod.2015.03.036

Cited by 85 publications

(51 citation statements)

References 32 publications

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“…The presence of the different oxidation states of manganese (Mn 3+ and Mn 4+ ) is necessary and significant to complete a catalytic cycle, which is beneficial to promoting low temperature SCR activity . It is widely proved that higher Mn 4+ ratio resulted in higher catalytic activity in SCR processes . Hence, the improvement of Mn 4+ ratio in MnCe/AlCr‐PILC is an important reason for the enhancement of SCR activity by supporting on AlCr‐PILC.…”

Section: Resultsmentioning

confidence: 99%

“…Second, the XPS analysis showed that the concentration of Mn 4+ and Ce 3+ ranked as follows: MnCe/AlCr‐PILC > MnCe/Cr‐PILC > MnCe/ Al‐PILC. It is widely proved that the increase in Mn 4+ ratio or Ce 3+ ratio is in favor of higher NO conversion in the NH 3 ‐SCR . Third, the redox properties of Mn in MnCe/AlCr‐PILC were promoted by the interaction of Mn, Ce, and Cr.…”

Section: Resultsmentioning

confidence: 99%

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Co-catalytic effect of Al-Cr pillared montmorillonite as a new SCR catalytic support

Chen

Cen

Feng

et al. 2016

J. Chem. Technol. Biotechnol.

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BACKGROUND It is of great interest to use pillared clay (PILC) as a cheap support for a selective catalytic reduction (SCR) catalyst. Al‐Cr pillared clay (AlCr‐PILC) has high thermal stability due to the introduction of polycations of Al. As a support, AlCr‐PILC may show a co‐catalytic effect in SCR processes because chromium oxide itself is an active SCR catalyst. The aim of this work is to investigate the potential of AlCr‐PILC as a new low temperature SCR catalyst support. RESULTS A series of AlCr‐PILC with Al:Cr molar ratio varying from 0:4 to 4:0 were successfully synthesized to support manganese and cerium active phase. MnCe/AlCr(2:2)‐PILC exhibited the highest NOx conversion close to 100% at 200–300 °C, and more than 90% N2 selectively over a wide temperature window of 140–300 °C. The catalytic activity of MnCe/AlCr‐PILC in terms of both NOx conversion and N2 selectivity is much higher than those of MnCe/Al‐PILC, MnCe/Cr‐PILC, AlCr‐PILC, and the simple mixed MnCeAlCr, indicating the co‐catalytic effect of AlCr‐PILC support. CONCLUSION AlCr‐PILC is a very promising low‐temperature SCR catalyst support. The XRD, XPS, and H2‐TPR measurements prove that the co‐catalytic effect of AlCr‐PILC occurred via the strong interaction between MnCe and the AlCr‐PILC support. © 2016 Society of Chemical Industry

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Co-catalytic effect of Al-Cr pillared montmorillonite as a new SCR catalytic support

Chen

Cen

Feng

et al. 2016

J. Chem. Technol. Biotechnol.

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“…These characteristics were coordinated to the final catalytic performances in the SCR reaction and correlated to pure MnO x phases which were derived by the same synthesis method. The catalyst containing the highest manganese oxide loading and produced by glycine in below‐stoichiometric amount exhibited the best NO x conversion and N 2 yield, as a result of the high reducibility as well as the presence of the Mn 3 O 4 phase …”

Section: Further Applications Of Scs Catalysts In Various Processesmentioning

confidence: 99%

Review of Recent Studies on Solution Combustion Synthesis of Nanostructured Catalysts

et al. 2018

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Solution combustion synthesis (SCS) is a relatively new method for synthesizing catalytic materials with many distinct advantages: simplicity of method, short reaction times, and the capability to regulate crystal lattice parameters and thereby the activity and selectivity of catalysts. Over the last years, SCS has been used for the production and study of a multitude of new catalytic materials. This review considers and discusses the recent developments and trends in SCS of nanocatalysts, while special attention is paid to the development and applications of nanostructured catalysts.

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“…Mn-based oxide catalysts with the superiority of unique activities at low temperature and excellent redox properties have received much attention [9][10][11]. But due to the high sulfur sensitivity of the Mn-based catalysts, which can induce a severe deactivation, researchers have studied modified Mn-based catalysts by doping the other transition metal oxides [7,12].…”

Section: Introductionmentioning

confidence: 99%

Porous bimetallic Mn2Co1Ox catalysts prepared by a one-step combustion method for the low temperature selective catalytic reduction of NOx with NH3

Qiao

Wang

et al. 2015

Catalysis Communications

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MnO -CeO2 catalysts synthesized by solution combustion synthesis for the low-temperature NH3-SCR

Cited by 85 publications

References 32 publications

Co-catalytic effect of Al-Cr pillared montmorillonite as a new SCR catalytic support

Co-catalytic effect of Al-Cr pillared montmorillonite as a new SCR catalytic support

Review of Recent Studies on Solution Combustion Synthesis of Nanostructured Catalysts

Porous bimetallic Mn2Co1Ox catalysts prepared by a one-step combustion method for the low temperature selective catalytic reduction of NOx with NH3

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