Catalytic activity of Co-Mg-Al, Cu-Mg-Al and Cu-Co-Mg-Al mixed oxides derived from hydrotalcites in SCR of NO with ammonia

Chmielarz, Lucjan; Kuśtrowski, Piotr; Rafalska-Łasocha, Alicja; Majda, Dorota; Dziembaj, R.

doi:10.1016/s0926-3373(01)00254-5

Cited by 110 publications

(30 citation statements)

References 12 publications

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“…The DTG peaks at about 800-850°C are probably related to the thermal reduction of Cu(II) cations to Cu(I). Such effect was earlier reported for Cu-Mg-Al hydrotalcite derived mixed metal oxide even in oxygen containing atmosphere [3]. The XRD patterns of the as-prepared and calcined hydrotalcite-like materials are shown in Fig.…”

Section: Catalytic Testssupporting

confidence: 82%

“…), resulting in the positive charging of the brucite layers. This charge is compensated by anions (e.g., CO 3 2-) which together with water molecules are located in the interlayer space of LDHs. Furthermore, some of Mg 2?…”

Section: Introductionmentioning

confidence: 99%

“…Thermal decomposition of hydrotalcite-like materials at middle temperatures (T \ 600°C) results in the formation of the relatively high surface mixed metal oxides, with a high dispersion of introduced transition metals oxide species [2][3][4][5][6]. An increase in the calcination temperature results in the aggregation of these species and formation of the spinel phases [2][3][4][5][6]. Therefore, hydrotalcite-like materials are excellent precursors for the preparation of the metal oxide catalysts of the desired chemical and phase composition.…”

Section: Introductionmentioning

confidence: 99%

“…A great number of scientific papers presenting the studies of hydrotalcite-based materials as catalysts for various chemical processes was published. For example, Cu-Mg-Al mixed oxides were found to be active and selective catalysts for the DeNOx process [3] and selective catalytic oxidation of ammonia to nitrogen and water vapor [7]. Hydrotalcite-based mixed metal oxides modified with nickel were effective catalysts of steam methane reforming [8], while iron containing hydrotalcites were recognized as precursors of effective catalysts for ethylbenzene dehydrogenation [9].…”

Section: Introductionmentioning

confidence: 99%

“…Finally, the prepared hydrotalcite-like materials were calcined at 600, 700, or 800°C for 6 h. The samples codes and the molar ratios of metals are shown in Table 1. A detailed description of the hydrotalcite preparation was presented in our previous papers [2,3].…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

An influence of thermal treatment conditions of hydrotalcite-like materials on their catalytic activity in the process of N2O decomposition

Chmielarz

Rutkowska

Kuśtrowski

et al. 2011

J Therm Anal Calorim

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Hydrotalcite-like materials containing apart from magnesium and aluminum also copper, cobalt, nickel, and iron were prepared by a co-precipitation method. Thermal transformations of hydrotalcite-like materials were studied by thermal analysis methods as well as XRD, UV-vis-DRS, and XPS measurements of the samples calcined at various temperatures (600, 700, and 800°C). Calcined hydrotalcites, especially those containing cobalt and copper, were found to be active and selective catalysts of N 2 O decomposition. It was shown that an increase in the calcination temperature significantly activated the Co-containing catalysts. Promotion of the samples with potassium resulted in activation of the hydrotalcite-based catalysts.

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Section: Catalytic Testssupporting

confidence: 82%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

An influence of thermal treatment conditions of hydrotalcite-like materials on their catalytic activity in the process of N2O decomposition

Chmielarz

Rutkowska

Kuśtrowski

et al. 2011

J Therm Anal Calorim

Self Cite

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SCR performance enhancement of NiMnTi mixed oxides catalysts by regulating assembling methods of LDHs‐Based precursor

Liu

et al. 2020

Applied Organom Chemis

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A series of NiMnTi mixed metal oxides (Ni/Mn‐TiO2, Mn/NiTi‐LDO and TiO2/NiMn‐LDO, NiMnTi‐LDO) were synthesized via different assembling methods and evaluated in the selective catalytic reduction of NOx with NH3(NH3‐SCR). As the results presented, catalysts via diverse assembling methods of LDHs templates afforded different catalytic denitrification (DeNOx) performance, which might be related to the exposure degree of active constituents and the interaction intensity between metal components. Noticeably, compared with Ni/Mn‐TiO2, Mn/NiTi‐LDO and TiO2/NiMn‐LDO catalysts, the NiMnTi‐LDO catalyst deriving from one step in‐situ method NiMnTi‐LDH precursor template exhibited the most desirable performance at temperature window of 150–360 °C in NH3‐SCR (above 90% NOx conversion with 95% N2 selectivity). The specific structure and property of samples were correlated by means of a series of characterizations, where the results indicated that NiMnTi‐LDO possessed the highest surface area, the strongest redox ability, the most abundant acid amount and the best dispersion.

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NOx Removal Performance Optimization of NiMnTi Mixed Oxide Catalysts by Tuning the Redox Capability

et al. 2019

ChemCatChem

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A series of Ni4‐xMnxTi1Oy mixed metal oxides (Ni4‐xMnxTi1‐LDO) catalysts originated from layered double hydroxides (LDHs) were fabricated and evaluated in the selective catalytic reduction of NO with NH3 (NH3‐SCR). To optimize the denitrification performance, the redox capability of catalysts was adjusted by calcining the Ni4‐xMnxTi1‐LDHs precursors with different Mn loading at different temperatures. The results revealed that calcination temperature was the secondary factor while the molar ratio of Mn to Ni was the main factor for influencing the redox properties. Among Ni4‐xMnxTi1‐LDO catalysts, the Ni2Mn2Ti1‐LDO catalyst afforded the optimal DeNOx behavior with above 90 % NOx conversion and 95 % selectivity of N2 as well as superior SO2 resistance in the wide temperature region of 150–360 °C. Multiple characterizations indicated that exceptional catalytic performance of Ni2Mn2Ti1‐LDO catalyst was highly dependent on the suitable redox capability resulted from moderate concentration of Ni3+, Mn4+ and chemisorbed oxygen Oβ in catalysts surface.

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Catalytic activity of Co-Mg-Al, Cu-Mg-Al and Cu-Co-Mg-Al mixed oxides derived from hydrotalcites in SCR of NO with ammonia

Cited by 110 publications

References 12 publications

An influence of thermal treatment conditions of hydrotalcite-like materials on their catalytic activity in the process of N2O decomposition

An influence of thermal treatment conditions of hydrotalcite-like materials on their catalytic activity in the process of N2O decomposition

SCR performance enhancement of NiMnTi mixed oxides catalysts by regulating assembling methods of LDHs‐Based precursor

NOx Removal Performance Optimization of NiMnTi Mixed Oxide Catalysts by Tuning the Redox Capability

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