ChemInform Abstract: Alumina‐Supported Manganese Oxides for the Low‐Temperature Selective Catalytic Reduction of Nitric Oxide with Ammonia.

Singoredjo, L.; Korver, Ruben; Kapteijn, Freek; Moulijn, Jacob A.

doi:10.1002/chin.199311017

Cited by 2 publications

(1 citation statement)

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“…Unsupported MnO x prepared by a precipitation method using sodium carbonate exhibited excellent activity for SCR of NO x with NH 3 in the temperature range of 758C-2008C (Kang et al, 2006). Supporting MnO x catalysts, such as MnO x /TiO 2 (Ettireddy et al, 2007;Wu et al, 2008a;Jiang et al, 2009), MnO x /Al 2 O 3 (Singoredjo et al, 1992;Kijlstra et al, 1997), and MnO x /ACF (Yoshikawa et al, 1998;Marbán and Fuertes, 2001), were also active for low-temperature SCR of NO x with NH 3 . The nature of the support was found to be a very important factor in SCR of NO x with NH 3 (Smirniotis et al, 2006).…”

Section: Introductionmentioning

confidence: 90%

MnO_x/Ce_0.6Zr_0.4O₂ Catalysts for Low-Temperature Selective Catalytic Reduction of NO_x with NH₃

Shen¹,

Liu²,

Yang³

et al. 2011

Environmental Engineering Science

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Innovative catalysts of manganese oxides supported on Ce 0.6 Zr 0.4 O 2 prepared by different methods (e.g., citric acid method, coprecipitation method, and combustion method) were studied for low-temperature selective catalytic reduction of NO x with NH 3 at 808C-2608C. Compared with MnO x /Ce 0.6 Zr 0.4 O 2 (coprecipitation method) and MnO x /Ce 0.6 Zr 0.4 O 2 (combustion method), MnO x /Ce 0.6 Zr 0.4 O 2 (citric acid method) exhibited the best performance on selective catalytic reduction activity even in the presence of H 2 O and SO 2 . X-ray diffraction, N 2 adsorption, X-ray photoelectron spectroscopy, and temperature-programmed experiments (H 2 -TPR and NH 3 -TPD) were used to characterize properties of the catalysts. Large surface area, small crystalline size, high surface chemisorbed oxygen, and high dispersion of manganese oxides might be the main reasons for the excellent performance of the catalysts.

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Section: Introductionmentioning

confidence: 90%

MnO_x/Ce_0.6Zr_0.4O₂ Catalysts for Low-Temperature Selective Catalytic Reduction of NO_x with NH₃

Shen¹,

Liu²,

Yang³

et al. 2011

Environmental Engineering Science

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Catalysis by Manganese Oxide Monolayers Part 1: Alumina and Magnesia Supports

Chuah

Jaenicke

et al. 1995

Ber Bunsenges Phys Chem

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Words: Catalysis, Heterogeneous / Manganese Oxide / Model Catalysts / Monolayers / Surfaces Manganese oxide deposited on alumina and magnesia by different preparation methods has been studied with respect to its surface structure and reactivity. The controlled deposition of mono-atomic layers is effected by a grafting reaction between surface hydroxyl groups and manganese ethoxide. Repeated grafting allows multiple layers to be built up in a controlled manner. The properties of these catalysts differ from those prepared by conventional wet impregnation techniques and mechanical mixing. Test reactions involving carbon monoxide oxidation and isopropanol decomposition reveal significant differences in the activity and selectivity of the catalysts prepared by grafting, impregnation and mechanical mixing. The manganese oxide grafted to alumina shows bulklike properties after a full monolayer is built up. XPS studies show that the grafting reaction leads to continuous films of the manganate covering the entire surface with monolayer thickness, whereas impregnation most likely results in small crystallites which cover only part of the surface. The calcination temperature is an important parameter determining the oxidation state of the manganese and the crystallinity of the oxide. Ammonia and isopropanol temperature-programmed desorption indicates that the acid/base and redox properties of the catalysts are considcrably modified by a strong interaction between the support and the overlayer.Be ,: Hurr,wgc.s. Pliy.~, Clierrr. 99, 184-195 (1995) No. 2 0 VCH V e r l u~s~e .~e l l .~~h u f t mbH, 0.69451 Weinheirn, 1995 0005-9021/9S/0202-UIX4 . $ 10.00t.25i0

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ChemInform Abstract: Alumina‐Supported Manganese Oxides for the Low‐Temperature Selective Catalytic Reduction of Nitric Oxide with Ammonia.

Cited by 2 publications

References 1 publication

MnO_x/Ce_0.6Zr_0.4O₂ Catalysts for Low-Temperature Selective Catalytic Reduction of NO_x with NH₃

MnO_x/Ce_0.6Zr_0.4O₂ Catalysts for Low-Temperature Selective Catalytic Reduction of NO_x with NH₃

Catalysis by Manganese Oxide Monolayers Part 1: Alumina and Magnesia Supports

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ChemInform Abstract: Alumina‐Supported Manganese Oxides for the Low‐Temperature Selective Catalytic Reduction of Nitric Oxide with Ammonia.

Cited by 2 publications

References 1 publication

MnOx/Ce0.6Zr0.4O2 Catalysts for Low-Temperature Selective Catalytic Reduction of NOx with NH3

MnOx/Ce0.6Zr0.4O2 Catalysts for Low-Temperature Selective Catalytic Reduction of NOx with NH3

Catalysis by Manganese Oxide Monolayers Part 1: Alumina and Magnesia Supports

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MnO_x/Ce_0.6Zr_0.4O₂ Catalysts for Low-Temperature Selective Catalytic Reduction of NO_x with NH₃

MnO_x/Ce_0.6Zr_0.4O₂ Catalysts for Low-Temperature Selective Catalytic Reduction of NO_x with NH₃