Synthesis of high surface area γ-Al2O3 as an efficient catalyst support for dehydrogenation of n-dodecane

Akia, Mandana; Alavi, Seyed Mehdi; Rezaei, Mehran; Zhang, Yan

doi:10.1007/s10934-009-9267-6

Cited by 15 publications

(9 citation statements)

References 11 publications

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“…As shown, Al-300 and Al-500 exhibited a higher specic surface area of 773 m 2 g À1 and 347 m 2 g À1 , respectively, which are higher than that of most reported alumina materials in literature. 23,24,32,33 Here, taking multiple factors (e.g., thermal stability, surface chemistry and porous structure) into consideration, samples Al-500 and Al-700 were used as adsorbents for further study of their Cr(VI) removal performance. Based on the above results, the obtained Al 2 O 3 materials equipped with high surface area, micrometer-sized structure, long aspect ratio, and rich surface hydroxyl groups 28 are considered to provide facile transportation, high adsorption capacity, and easy recovery, which are greatly desired in the removal of pollutants from water.…”

Section: Morphology and Structural Properties Of The Obtained Al 2 O ...mentioning

confidence: 99%

Efficient removal of hexavalent chromium by high surface area Al₂O₃rods

Zhang

Guo

2015

RSC Adv.

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Section: Morphology and Structural Properties Of The Obtained Al 2 O ...mentioning

confidence: 99%

Efficient removal of hexavalent chromium by high surface area Al₂O₃rods

Zhang

Guo

2015

RSC Adv.

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“…2(c) that the cell diameters of polyacrylonitrile materials prepared at high volume ratio (90 %) of the droplet phase became larger (8-10 µm) compared to Fig. 2(a, b) due to the serious coalescence of the droplets 8,9 . Porous polyacrylonitrile materials have dual pore porosities: Large cells which are typical of this kind of materials and much smaller pores connecting adjacent cells of the foams.…”

Section: Resultsmentioning

confidence: 90%

Preparation and Characterization of Porous Polyacrylonitrile Materials via Concentrated Emulsion Template Method

Chang¹,

Gong²,

Chen³

et al. 2014

Asian J. Chem.

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INTRODUCTION Recently, highly porous polymer materials with controlled morphology prepared via concentrated emulsion template method had gained extensive research interests due to their favorable properties such as large surface area, high porosity, high absorbency capabilities and good permeability 1,2. The concentrated emulsions had been defined as emulsions in which the droplet phase occupies more than 74 % of the total emulsion volume. This figure represents the maximum volume ratio of uniform droplets packed in the most compact manner 2. Generally, concentrated emulsions consist of continuous phase, which contains monomers mixed with suitable crosslinker and surfactant and droplet phase, which comprises a solution of initiator and electrolyte in distilled water. After the polymerization of the continuous phase and the removal of the droplet phase, polymer foams with open-celled structures were produced. The polymer foams prepared via concentrated emulsion template method had been considered for many applications, such as filtration media, catalyst supports, tissue engineering scaffold and ion-exchange resins due to their unique properties 3,5. By far, the most widely investigated polymer foams prepared via concentrated emulsion template method were made of styrene and divinylbenzene as the continuous phase. Recently, more porous materials had been synthesized using other monomers, such as butyl acrylate, benzyl chloride and

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“…Los catalizadores A, AFSG y AFI presentan isotermas de tipo IV [15] el cual se asocia con el fenómeno de la condensación capilar y nos sugiere un material mesoporoso, además de la presencia de ciclos de histéresis. El ciclo de histéresis para A y AFSG es de tipo Hl, característico de la 'r'-AliO3 sintetizada por sol-gel [16], asociado a las geometrías de capilares de cilindros abiertos por los dos extremos y capilares en forma de tintero con cuello corto y estrecho. Sin embargo para el catalizador AFI hay un ciclo de histéresis tipo H3, el cual tiene geometrías de capilares en forma de hendidura abierta con paredes paralelas o capilares con cuerpos anchos y cuellos cortos y estrechos.…”

Section: Catalizador Composiciónunclassified

Catalizadores de alúminas modificadas mediante la incorporación de Fe por el método sol-gel e impregnación y su desempeño catalítico en la combustión del tricloroetileno

et al. 2013

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En el presente estudio se prepararon catalizadores de alúmina (A) y alúmina dopada con Fe (AFSG) por el método de Sol-Gel y se compararon contra un catalizador de alúmina dopada con Fe por el método de impregnación (AF-1). El porciento de óxido de hierro fue determinado por espectrometría de fluorescencia de rayos X (EFRX). Para la caracterización de los catalizadores, se determinó el comportamiento térmico mediante TGA/DTA, donde se destacó la formación de la Al2O3 y Fe2O3 para los catalizadores dopados (AFSG y AFI). Mediante DRX se confirmó la fase la Al2O3. La morfología de la superficie de los catalizadores fue estudiada por microscopia electrónica de barridos (MEB) donde se observó la forma y tamaño de los aglomerados. Mediante fisisorción de nitrógenos se determinó las isotermas de adsorción y el área de superficie de los tres catalizadores. La identificación de los elementos presentes y la estructura de los orbitales de enlace se determinó por espectroscopia de fotoelectrones emitidos por rayos X (XPS). La combustión catalítica del TCE se realizó en un rango de 50 ºC a 600 ºC. Los catalizadores se compararon en términos de actividad y selectividad para los diferentes productos de reacción: CO2, CO, Cl2 y HCl.

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Synthesis of high surface area γ-Al2O3 as an efficient catalyst support for dehydrogenation of n-dodecane

Cited by 15 publications

References 11 publications

Efficient removal of hexavalent chromium by high surface area Al₂O₃rods

Efficient removal of hexavalent chromium by high surface area Al₂O₃rods

Preparation and Characterization of Porous Polyacrylonitrile Materials via Concentrated Emulsion Template Method

Catalizadores de alúminas modificadas mediante la incorporación de Fe por el método sol-gel e impregnación y su desempeño catalítico en la combustión del tricloroetileno

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Synthesis of high surface area γ-Al2O3 as an efficient catalyst support for dehydrogenation of n-dodecane

Cited by 15 publications

References 11 publications

Efficient removal of hexavalent chromium by high surface area Al2O3rods

Efficient removal of hexavalent chromium by high surface area Al2O3rods

Preparation and Characterization of Porous Polyacrylonitrile Materials via Concentrated Emulsion Template Method

Catalizadores de alúminas modificadas mediante la incorporación de Fe por el método sol-gel e impregnación y su desempeño catalítico en la combustión del tricloroetileno

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Efficient removal of hexavalent chromium by high surface area Al₂O₃rods

Efficient removal of hexavalent chromium by high surface area Al₂O₃rods