Performance of Ti-pillared montmorillonite supported Fe catalysts for toluene oxidation: The effect of Fe on catalytic activity

Liang, Xiaoliang; Qi, Feihong; Liu, Peng; Wei, Gaoling; Su, Xiaoli; Ma, Longlong; He, Hongping; Lin, Xiaoju; Xi, Yunfei

doi:10.1016/j.clay.2016.05.022

Cited by 49 publications

(20 citation statements)

References 41 publications

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“…For the clay sample (Figure a), the diffraction peak at 2 θ = 9.3° was the characteristic diffraction signal of the (001) crystal plane of the montmorillonite, indicating that the clay possessed a regular and ordered layered structure. As for the Al‐PILC (Figure b) and Al‐Mn‐PILC (Figure c) samples, intensity of the (001) reflection typical for montmorillonite was low or even it disappeared after pillaring, indicating that the interlayer structure of the clay became disordered due to a strong delamination process when the metal oxide was incorporated into the montmorillonite interlayer, which generated a “house card” structure as previously reported …”

Section: Resultssupporting

confidence: 74%

Ceria‐modified Al‐Mn‐pillared clay catalysts for the selective catalytic reduction of NO with NH₃ at low temperatures

Cheng

et al. 2020

Asia-Pacific J Chem Eng

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The yCe/Al-Mn-pillared interlayered clay (PILC, y [Ce content] = 8-9 wt%) catalysts were prepared using the impregnation method. Catalytic activities of the materials for the selective catalytic reduction (SCR) of NO with NH 3 at low temperatures were evaluated, and physicochemical properties of the samples were characterized by X-ray diffraction, N 2 adsorption-desorption, temperature-programmed reduction, ammonia temperature-programmed desorption, X-ray photoelectron spectroscopy, and in situ diffuse reflectance infrared Fourier transform spectroscopy techniques. It is found that introduction of cerium enhanced NO conversions at low temperatures, and the 8Ce/Al-Mn-pillared sample showed the highest NO conversion (92% at 300 C). The superior catalytic activity of 8Ce/Al-Mn-PILC was associated with the change in active component and increases in amounts of the surface chemisorbed oxygen species and the acid sites after ceria loading. Additionally, the SCR reaction mechanism over 8Ce/Al-Mn-PILC followed both Langmuir-Hinshelwood and Eley-Rideal mechanisms, with the former being dominant. K E Y W O R D SAl-Mn copillared clay, ceria loading, selective catalytic reduction, in situ DRIFTS | Al-Mn-PILC-supported ceria catalystsThe yCe/Al-Mn-PILC (y = 8 and 9 wt%) samples were prepared by impregnating the Al-Mn-PILC support with Ce (NO 3 ) 3 Á6H 2 O. Then, the sample was dried at 120 C for 6 hr and calcined at 400 C for 2 hr in an air atmosphere. | Al-PILC-supported Mn and claysupported Ce-Mn catalystsThe Mn/Al-PILC (Mn [i.e., Mn/{Mn + Al-PILC}] was 10 wt%, which was the same content of Mn in Al-Mn-2 of 14 CHENG ET AL.

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Section: Resultssupporting

confidence: 74%

Ceria‐modified Al‐Mn‐pillared clay catalysts for the selective catalytic reduction of NO with NH₃ at low temperatures

Cheng

et al. 2020

Asia-Pacific J Chem Eng

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“…448 Other transition metal (e.g., V, Ti, Ni, Cr and Fe) supported catalysts have also been investigated for toluene oxidation. [454][455][456][457][458][459] It was reported that a Ti/MCM-41 catalyst, obtained by a direct synthesis route, which consisted of a substantial quantity of Ti exhibited a notably higher activity than that of a corresponding catalyst prepared by the wet impregnation technique on TiO2-anatase. 304 Mesoporous nickel oxides with two different morphologies; nanorods and nanocubes, were prepared using a microemulsion strategy and tested for this reaction.…”

Section: Toluenementioning

confidence: 99%

Recent Advances in the Catalytic Oxidation of Volatile Organic Compounds: A Review Based on Pollutant Sorts and Sources

et al. 2019

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“…Comparison with the literature data shows that in toluene combustion these materials perform considerably better than other previously described clay-transition metal oxide composite catalysts, e.g. Cu,Ce/Zr-PILC (T 90 = 300 °C) [ 10 ], Fe-PILC (T 90 = 380 °C) [ 15 ], or Fe/Ti-PILC (T 90 = 347 °C) [ 18 ].…”

Section: Resultsmentioning

confidence: 80%

“…Catalyst design is usually based on noble metals or on transition metal oxides, the latter being attractive due to their lower price. It has been repeatedly demonstrated that efficient VOCs combustion catalysts can be developed from clay minerals of anionic and/or cationic character (e.g., [ 2 , 3 , 4 , 5 , 6 , 7 , 8 , 9 , 10 , 11 , 12 , 13 , 14 , 15 , 16 , 17 , 18 , 19 ]). Recently, we proposed a novel strategy for preparing VOCs combustion catalysts, in which the catalytically active Mn-Al oxide nanoparticles, obtained from hydrotalcite (Ht) precursor synthesized by an inverse microemulsion method, are trapped between randomly oriented layers of smectite (Laponite) [ 19 ].…”

Section: Introductionmentioning

confidence: 99%

Novel Montmorillonite/TiO2/MnAl-Mixed Oxide Composites Prepared from Inverse Microemulsions as Combustion Catalysts

et al. 2017

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A novel design of combustion catalysts is proposed, in which clay/TiO2/MnAl-mixed oxide composites are formed by intermixing exfoliated organo-montmorillonite with oxide precursors (hydrotalcite-like in the case of Mn-Al oxide) obtained by an inverse microemulsion method. In order to assess the catalysts’ thermal stability, two calcination temperatures were employed: 450 and 600 °C. The composites were characterized with XRF (X-ray fluorescence), XRD (X-ray diffraction), HR SEM (high resolution scanning electron microscopy, N2 adsorption/desorption at −196 °C, and H2 TPR (temperature programmed reduction). Profound differences in structural, textural and redox properties of the materials were observed, depending on the presence of the TiO2 component, the type of neutralization agent used in the titania nanoparticles preparation (NaOH or NH3 (aq)), and the temperature of calcination. Catalytic tests of toluene combustion revealed that the clay/TiO2/MnAl-mixed oxide composites prepared with the use of ammonia showed excellent activity, the composites obtained from MnAl hydrotalcite nanoparticles trapped between the organoclay layers were less active, but displayed spectacular thermal stability, while the clay/TiO2/MnAl-mixed oxide materials obtained with the aid of NaOH were least active. The observed patterns of catalytic activity bear a direct relation to the materials’ composition and their structural, textural, and redox properties.

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Performance of Ti-pillared montmorillonite supported Fe catalysts for toluene oxidation: The effect of Fe on catalytic activity

Cited by 49 publications

References 41 publications

Ceria‐modified Al‐Mn‐pillared clay catalysts for the selective catalytic reduction of NO with NH₃ at low temperatures

Ceria‐modified Al‐Mn‐pillared clay catalysts for the selective catalytic reduction of NO with NH₃ at low temperatures

Recent Advances in the Catalytic Oxidation of Volatile Organic Compounds: A Review Based on Pollutant Sorts and Sources

Novel Montmorillonite/TiO2/MnAl-Mixed Oxide Composites Prepared from Inverse Microemulsions as Combustion Catalysts

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Performance of Ti-pillared montmorillonite supported Fe catalysts for toluene oxidation: The effect of Fe on catalytic activity

Cited by 49 publications

References 41 publications

Ceria‐modified Al‐Mn‐pillared clay catalysts for the selective catalytic reduction of NO with NH3 at low temperatures

Ceria‐modified Al‐Mn‐pillared clay catalysts for the selective catalytic reduction of NO with NH3 at low temperatures

Recent Advances in the Catalytic Oxidation of Volatile Organic Compounds: A Review Based on Pollutant Sorts and Sources

Novel Montmorillonite/TiO2/MnAl-Mixed Oxide Composites Prepared from Inverse Microemulsions as Combustion Catalysts

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Ceria‐modified Al‐Mn‐pillared clay catalysts for the selective catalytic reduction of NO with NH₃ at low temperatures

Ceria‐modified Al‐Mn‐pillared clay catalysts for the selective catalytic reduction of NO with NH₃ at low temperatures