The synthesis of mesoporous Cr-AlPO was carried out under hydrothermal conditions. Characterisation of the catalyst was done with low angle XRD, N 2 adsorption, UV-VISDRS, ESR and thermal analysis. The catalytic activity was tested for partial oxidation of toluene with molecular oxygen in vapour phase. It was observed that Cr-AlPO functions both as acid and redox catalyst. © 2002 Elsevier Science B.V. All rights reserved.

Balasubramanian Viswanathan

Thirukkallam Kanthadai Varadarajan

Adsorption

Aluminum Compounds

Catalyst activity

Chemical reactors

Chromium

Electron spin resonance spectroscopy

Mesoporous Materials

oxidation

Synthesis (chemical)

X ray diffraction analysis

X ray photoelectron spectroscopy

Molecular oxygen

REDOX CATALYSTS

toluene

Fulltext

IIT Madras is a public technical and research university located in Chennai, Tamil Nadu. Founded in 1959, it is recognised as an Institute of National Importance.

IIT Madras has been ranked as the top engineering institute in India for four years in a row by the National Institutional Ranking Framework of the MHRD

It currently offers undergraduate, postgraduate and research degrees across 16 disciplines in Engineering, Sciences, Humanities and Management. About 596 faculty belonging to science and engineering departments and centres of the Institute are engaged in teaching, research and industrial consultancy.

IIT Madras

Partial oxidation of toluene by O2 over mesoporous Cr/AlPO

Catalysis Communications

Trivalent iron incorporated mesoporous aluminophosphate was synthesized under hydrothermal conditions. The synthesized mesoporous Fe-AlPO was characterized by using various physico-chemical techniques, which confirm the formation of mesophase as well as the presence of trivalent iron in the framework. Catalytic activity of mesoporous Fe-AlPO was tested for the oxidation of cyclohexane. Trivalent iron incorporated mesoporous aluminophosphate was synthesized and characterized. Activity of Fe-AlPO was tested for aerial oxidation of cyclohexane under autoclave conditions. The results indicated that Fe-AlPO is an active catalyst for oxidation of cyclohexane and the reaction is probably taking place through radical initiated mechanism. © 2004 Elsevier B.V. All rights reserved.

Journal of Molecular Catalysis A: Chemical

Synthesis, characterization and catalytic activity of mesoporous trivalent iron substituted aluminophosphates

The syntheses of thermally stable chromium-incorporating hexagonal mesoporous aluminophosphate and cubic Cr-MCM-48 have been reported. Characterization of the catalysts was made using low angle XRD, N2 adsorption, UV-VISDRS, thermal analysis, ICP-AES and ESR. Mesoporous Cr-AlPO4 and Cr-MCM-48 catalysts have been found to be active for the vapour phase oxidation of toluene with molecular oxygen. Mesoporous Cr-AlPO4 is found to exhibit both acidic and redox properties and hence oxidation as well as dealkylation reactions are taking place in a concerted manner, whereas, the cubic silicate analogue acts as a pure redox catalyst. © 2002 Elsevier Science B.V. All rights reserved.

Applied Catalysis A: General

Catalytic oxidation of toluene with molecular oxygen over Cr-substituted mesoporous materials

Chromium-containing hexagonal mesoporous aluminophosphate molecular sieve materials were synthesized, characterized and evaluated for the oxidation of cyclohexane under mild conditions. The catalysts showed remarkable activity for the chosen reaction with very high substrate conversion and excellent product selectivity. In addition, recycling studies over the spent catalysts as well as studies on quenched solutions under the reaction conditions indicated no or very meager loss in activity; thus, the materials behaved truly as heterogeneous catalysts. This observation was well supported by ICP-AES analysis of the filtrates obtained from the washed catalysts where no leaching of active chromium species was detected. Furthermore, the reaction carried out using these filtrates confirmed the absence of active metal ions as it exhibited only a marginal activity.

Catalysis Letters

Synthesis, characterization, and catalytic properties of chromium-containing hexagonal mesoporous aluminophosphate molecular sieves

World Patent Information

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The Journal of Physical Chemistry B

Electron Spin Resonance and Electron Spin Echo Modulation Spectroscopy of Aluminophosphate-Based Mesoporous Molecular Sieve Containing Framework Manganese

Journal of Catalysis

A Study of the Feasibility of Incorporation of Chromium into the Molecular Sieve Framework: The Transformation of 1-Butene over Cr-Silicoaluminophosphate Molecular Sieves

Chemical Communications

Synthesis of thermally stable mesoporous hexagonal aluminophosphate molecular sieves

Synthesis and characterization of mesostructured aluminophosphates using the fluoride route

Partial oxidation of toluene by O2 over mesoporous Cr-AlPO

Journal	Catalysis Communications
ISSN	15667367
Open Access	Yes