Preparation, characterization and catalytic activity in the deep oxidation of acetone of Cr,Al-pillared saponites

Gil, A.; Vicente, M.A.; Toranzo, R.; Bañares, Miguel Á.; Gandı́a, L.M.

doi:10.1002/(sici)1097-4660(199806)72:2<131::aid-jctb884>3.3.co;2-k

Cited by 3 publications

(6 citation statements)

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“…Sometimes, mesoporosity could be also formed. The Brőnsted acidity and the specific surface area of PILCs contributed to a better catalytic performance of the transition metal species, suchlike Al and Cr (Gil et al, 1998) and of the noble metals, like Pt (Gil et al, 2001).…”

Section: Carriers Used On Vocs Oxidationmentioning

confidence: 99%

Destruction of Volatile Organic Compounds by Catalytic Oxidation

Rusu

Dumitriu

2003

Environ. Eng. Manag. J.

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Volatile organic compounds, emitted by a lot of sources, particularly from gasoline engines of automobiles, are air pollutants that give rise to deleterious health and environmental effects. Total catalytic oxidation is an attractive method in controlling these emissions due the great amounts of energy saved, by the moderate temperature involved. For wide implementation of catalytic combustion, thermally, mechanically and chemically stable catalysts are required. The paper is a short reviewing of the available catalysts and also of the new innovations concerning either enhance of their performances or new better formulations.

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Section: Carriers Used On Vocs Oxidationmentioning

confidence: 99%

Destruction of Volatile Organic Compounds by Catalytic Oxidation

Rusu

Dumitriu

2003

Environ. Eng. Manag. J.

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“…Polymer‐bound chromate based on ion‐exchange resins and poly (4‐vinylpyridine) resins have been described previously for the oxidation of alcohols . Chromium is an interesting metal for environmental catalytic applications because of the variety of its oxidation states . Only in a few cases, these catalysts are based on clay supports .…”

Section: Introductionmentioning

confidence: 99%

“…Chromium is an interesting metal for environmental catalytic applications because of the variety of its oxidation states . Only in a few cases, these catalysts are based on clay supports . Contamination of environment with soluble chromium species can be completely controlled when this reagent is attached to insoluble polymeric support .…”

Section: Introductionmentioning

confidence: 99%

Synthesis and application of polymer-clay nanocomposite-supported dichromate oxidizing agent

et al. 2014

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A hybride polymer–clay nanocomposite supported dichromate reagents was prepared. Direct interaction of poly(styrene‐co‐N‐methyl‐4‐vinylpyridinium) iodide with sodium montmorillonite (MMT) through ion exchange between sodium cations in MMT and pyridinium ions in the copolymer afforded a polymer–clay nanocomposite (3). The resulting nanocomposite was reacted with potassium dichromate to form the nanocomposite‐supported reagents (4). The structure of the resulting nanocomposite was characterized by elemental analysis, infrared spectroscopy, X‐ray diffraction and transmission electron microscopy. The dispersion of the MMT particles in the polymer matrix was confirmed using scanning electron microscopy. X‐ray mapping for silicon in the nanocomposite revealed uniform distribution of Si in the polymer matrix. The effectiveness of these materials has been tested for oxidation of saturated primary, secondary and benzylic alcohols to their corresponding aldehydic and ketonic compounds in addition to oxidation of quinol to the corresponding quinone. Importantly, there is almost no formation of side‐product of this process. POLYM. COMPOS., 36:2066–2075, 2015. © 2014 Society of Plastics Engineer

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“…These species coexist in Cr-speciation diagram with the monomer [Cr(H 2 O) 6 ] 3+ , and we may refer to all them with the general term ''Cr-polycations'', although the last one obviously is not a polymeric species. Aluminium can easily be polymerised to form the well-known polycation [Al 13 O 4 (OH) 24 (H 2 O) 12 ] 7+ , in short Al 13 , very efficient for the intercalation of clays [14][15][16]. Alumina-pillared clays are thus wellknown, easy to prepare and very stable [1][2][3][4][5][6][7].…”

Section: Introductionmentioning

confidence: 99%

“…Chromium is an interesting metal for catalytic applications because of the variety of its oxidation states [22]. Chromium catalysts have been used in several reactions with environmental applications, such as the combustion of volatile organic compounds (VOCs) [23,24] and Cl-VOCs [25], and DeNOx reactions [26]. Only in a few cases these catalysts are based in clay supports [24,27].…”

Section: Introductionmentioning

confidence: 99%

Chromium–saponite clay catalysts: Preparation, characterization and catalytic performance in propene oxidation

Mata

Trujillano

Vicente

et al. 2007

Applied Catalysis A: General

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Chromium-saponite catalysts have been prepared by two synthesis procedures. The first method consisted in the intercalation of the saponite with solutions containing aluminium and chromium oligomers with various molar ratios, while the second one consisted in the incipient wetness impregnation of alumina-pillared saponite with several chromium salts, ammonium chromate, Cr(II) acetate and Cr(III) nitrate. Several techniques, X-ray diffraction, nitrogen physisorption at À196 8C, thermogravimetric and differential thermal analysis, infrared and DR-UV-vis spectroscopies, temperature-programmed reduction and electron paramagnetic resonance spectroscopy at À196 8C, have been used to characterize and to compare the properties of the materials synthesized. The results show that the solids obtained combine the layered structure of the clay and the thermal stability given by the alumina pillars. The catalysts have been tested in the oxidation of propene, showing a catalytic behaviour according to the Mars-van Krevelen mechanism, the performance not depending on the method in which chromium was incorporated to the clay.

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Preparation, characterization and catalytic activity in the deep oxidation of acetone of Cr,Al-pillared saponites

Cited by 3 publications

References 0 publications

Destruction of Volatile Organic Compounds by Catalytic Oxidation

Destruction of Volatile Organic Compounds by Catalytic Oxidation

Synthesis and application of polymer-clay nanocomposite-supported dichromate oxidizing agent

Chromium–saponite clay catalysts: Preparation, characterization and catalytic performance in propene oxidation

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