Catalytic conversion of chloromethane to methanol and dimethyl ether over mesoporous γ-alumina

Khaleel, Abbas; Shehadi, Ihsan A.; Al‐Marzouqi, Ali H.

doi:10.1016/j.fuproc.2011.04.029

Cited by 12 publications

(3 citation statements)

References 28 publications

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“…Designing new heterogeneous catalytic processes which are environmentally friendly is still an ultimate goal for many critical industrial processes and pharmaceutical applications. − One approach to achieve the green socio-economic benefits is to design new catalysts that are supported on bio-polymers, supramolecules, and other scaffolding materials. The excellent capabilities of these materials lie in improving the recyclability, the selectivity, and the activity of catalysts as well as the rate of the chemical reactions and high conversions and product selectivity. − In the past few years, cyclodextrins have been widely used as a support in catalytic synthesis of bi-aryl and aryl-olefinic compounds through Suzuki–Miyaura C–C which produces a wide range of natural and medicinal compounds.…”

Section: Introductionmentioning

confidence: 99%

β-Cyclodextrin-Functionalized Fe₃O₄-Supported Pd-Nanocatalyst for the Reduction of Nitroarenes in Water at Mild Conditions

et al. 2023

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In this study, a novel heterogeneous catalyst (Fe 3 O 4 @β-CD@Pd) has been developed by the deposition of palladium nanoparticles on the β-cyclodextrin-functionalized surface of magnetic Fe 3 O 4 . The catalyst was prepared by a simple chemical co-precipitation method and characterized extensively by using Fourier transform infrared (FTIR) spectroscopy, thermogravimetric analysis (TGA), X-ray diffraction (XRD), field-emission scanning electron microscopy (FE-SEM), energy dispersive X-ray spectroscopy (EDX), transmission electron microscopy (TEM), Xray photoelectron spectroscopy (XPS), and inductively coupled plasma-optical emission spectrometry (ICP-OES) analyses. Herein, the applicability of the prepared material was evaluated for the catalytic reduction of environmentally toxic nitroarenes to the corresponding anilines. The catalyst Fe 3 O 4 @β-CD@Pd showed excellent efficiency for the reduction of nitroarenes in water under mild conditions. A low catalyst loading of 0.3 mol % Pd is found to be efficient for reducing nitroarenes in excellent to good (99− 95%) yields along with high TON values (up to 330). Nevertheless, the catalyst was recycled and reused up to the 5th cycle of reduction of nitroarene without any loss of significant catalytic activity.

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Section: Introductionmentioning

confidence: 99%

β-Cyclodextrin-Functionalized Fe₃O₄-Supported Pd-Nanocatalyst for the Reduction of Nitroarenes in Water at Mild Conditions

et al. 2023

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“…Alumina is commonly used in a variety of applications such as catalysis, − optical and biomedical purposes, ceramics, , and adsorption. − The addition of supplementary metal oxides, such as titania (used extensively in catalysis and photocatalysis , ), brings further applications to these materials. Titania-alumina materials can be used in automotives and aeronautics, dental implants and orthopedics, and the decontamination of chemical warfare agents .…”

Section: Introductionmentioning

confidence: 99%

Poly(ethylene oxide)–Poly(butylene oxide)–Poly(ethylene oxide)-Templated Synthesis of Mesoporous Alumina: Effect of Triblock Copolymer and Acid Concentration

Materna

Grant

Jaroniec

2012

ACS Appl. Mater. Interfaces

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Mesoporous alumina was synthesized via a one-pot self-assembly of aluminum isopropoxide and poly(ethylene oxide)-poly(butylene oxide)-poly(ethylene oxide) triblock copolymer in an acidic ethanol solution. The effects of the polymer concentration and nitric acid concentration, independently, on the adsorption properties (such as surface area, pore volume, microporosity, mesoporosity, and pore width) were studied. An increase in the specific surface area and the pore volume was seen for the samples containing a polymer/aluminum isopropoxide wt. ratio up to 0.71 and a polymer/acid wt ratio of 0.88. Titania isopropoxide was also added to the synthesis to illustrate the extension of this approach to alumina-based mixed metal oxides.

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“…Aerogels are highly porous solid materials derived from gels followed the substitution of liquid component with air from the pores of wet gels. [1][2][3][4][5] Due to their unique nanostructures, aerogels show low density, high porosity and high surface area and have been widely used in many fields, such as thermal insulation, catalysts, 6 catalyst carriers and sensors, 7 nuclear waste storage, and cosmic dust collectors. [8][9][10][11][12][13] Alumina aerogel has received high attention because of its a number of unique properties, such as high strength, better thermal insulation (30 • C, 1 atm, thermal conductivity is 0.029 W/m • k), 14 and chemical durability at high temperatures.…”

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confidence: 99%

Synthesis and Characterization of the Monolithic NiO-Al₂O₃Aerogels

Cui

et al. 2015

ECS J. Solid State Sci. Technol.

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NiO-Al 2 O 3 aerogels without any visible cracks were prepared via a sol-gel method combined with the organic solvent sublimation drying (OSSD) technique. The high temperature thermal stability of the resulting NiO-Al 2 O 3 aerogel was improved. And it shows a well-developed mesoporous structure with uniform pore size distribution (∼6 nm) and a high specific surface area (∼318.69 m 2 /g). © The Author(s) 2015. Published by ECS. This is an open access article distributed under the terms of the Creative Commons Attribution 4.0 License (CC BY, http://creativecommons.org/licenses/by/4.0/), which permits unrestricted reuse of the work in any medium, provided the original work is properly cited. [DOI: 10.1149/2.0321602jss] All rights reserved.Manuscript submitted September 21, 2015; revised manuscript received November 9, 2015. Published December 12, 2015 Aerogels are highly porous solid materials derived from gels followed the substitution of liquid component with air from the pores of wet gels. [1][2][3][4][5] Due to their unique nanostructures, aerogels show low density, high porosity and high surface area and have been widely used in many fields, such as thermal insulation, catalysts, 6 catalyst carriers and sensors, 7 nuclear waste storage, and cosmic dust collectors. 8-13Alumina aerogel has received high attention because of its a number of unique properties, such as high strength, better thermal insulation (30 • C, 1 atm, thermal conductivity is 0.029 W/m · k), 14 and chemical durability at high temperatures. 12,15 By adding other materials to alumina aerogel could pertinently alter to increase its performance. For instance, we successfully prepared the attapulgite (ATP)/Al 2 O 3 aerogels and found that ATP improved the strength of alumina aerogels.16 Al 2 O 3 -SiO 2 aerogels show higher mechanical strength and heat insulation performance.17 Ceramic fiber/silica aerogels have stronger mechanical properties than single silica aerogels.18 Fe 2 O 3 -Al 2 O 3 aerogels can be applied for selective hydrogenation reaction of sulfur dioxide. 19NiO-Al 2 O 3 aerogels, as one of doped materials, also have many excellent properties and has been widely studied. As early as decades ago, there were scientists studying NiO-Al 2 O 3 aerogels. The reducibility of the NiO can be decreased when certain amount of Al 2 O 3 added.20,21 Mesoporous NiO-Al 2 O 3 catalysts have high oxidative activity and selectivity in partial oxidation of methane.22 Xu et al. 23 observed that ordered mesoporous NiO-Al 2 O 3 composite oxides presented both high catalytic activity and long stability for the carbon dioxide reforming of methane reaction. Although NiO-Al 2 O 3 composite aerogel could be prepared by related template method, some of these methods are difficult to carry out and some products do not possess good performance. And researchers pointed out that it was difficult to obtain composite aerogel material with more centered pore size distribution and high specific surface area. 24,25 Organic solvent sublimation drying (OSSD) technique...

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Catalytic conversion of chloromethane to methanol and dimethyl ether over mesoporous γ-alumina

Cited by 12 publications

References 28 publications

β-Cyclodextrin-Functionalized Fe₃O₄-Supported Pd-Nanocatalyst for the Reduction of Nitroarenes in Water at Mild Conditions

β-Cyclodextrin-Functionalized Fe₃O₄-Supported Pd-Nanocatalyst for the Reduction of Nitroarenes in Water at Mild Conditions

Poly(ethylene oxide)–Poly(butylene oxide)–Poly(ethylene oxide)-Templated Synthesis of Mesoporous Alumina: Effect of Triblock Copolymer and Acid Concentration

Synthesis and Characterization of the Monolithic NiO-Al₂O₃Aerogels

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Catalytic conversion of chloromethane to methanol and dimethyl ether over mesoporous γ-alumina

Cited by 12 publications

References 28 publications

β-Cyclodextrin-Functionalized Fe3O4-Supported Pd-Nanocatalyst for the Reduction of Nitroarenes in Water at Mild Conditions

β-Cyclodextrin-Functionalized Fe3O4-Supported Pd-Nanocatalyst for the Reduction of Nitroarenes in Water at Mild Conditions

Poly(ethylene oxide)–Poly(butylene oxide)–Poly(ethylene oxide)-Templated Synthesis of Mesoporous Alumina: Effect of Triblock Copolymer and Acid Concentration

Synthesis and Characterization of the Monolithic NiO-Al2O3Aerogels

Contact Info

Product

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β-Cyclodextrin-Functionalized Fe₃O₄-Supported Pd-Nanocatalyst for the Reduction of Nitroarenes in Water at Mild Conditions

β-Cyclodextrin-Functionalized Fe₃O₄-Supported Pd-Nanocatalyst for the Reduction of Nitroarenes in Water at Mild Conditions

Synthesis and Characterization of the Monolithic NiO-Al₂O₃Aerogels