Synthesis of iron orthophosphate catalysts by solution and solution combustion methods for the hydroxylation of benzene to phenol

Baykan, Demet; Öztaş, Nurşen Altuntaş

doi:10.1016/j.materresbull.2015.01.019

Cited by 8 publications

(5 citation statements)

References 35 publications

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“…Jourshabani et al studied the effect of using Fe-supported cagelike mesoporous silica in benzene hydroxylation to phenol using H 2 O 2 as an oxidant. Baykan and Oztas reported the synthesis of phenol via the direct hydroxylation of benzene over iron phosphate. Carneiro and Silva studied the direct hydroxylation of benzene to phenol using hydrogen peroxide in the presence of an Fe(III) Schiff base complex as a catalyst.…”

Section: Introductionmentioning

confidence: 99%

Iron Oxychloride as an Efficient Catalyst for Selective Hydroxylation of Benzene to Phenol

et al. 2018

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Selective hydroxylation of benzene is a felicitous strategy for the production of phenol that is deemed an alternative route for conventional processes. Thus, the development of a durable and highly efficient catalyst for the selective hydroxylation of benzene should be the key topic. In this work, FeOCl was prepared by chemical vapor transition method and characterized using various techniques including XRD, TEM, Raman spectroscopy, N 2 adsorption-desorption, DLS and TGA. The prepared FeOCl was applied as heterogeneous catalyst in benzene hydroxylation and the reaction conditions were optimized. The acquired data manifested that FeOCl has shown superiority over the other reported catalysts utilized in benzene hydroxylation. The superiority of FeOCl is attributed to the facile self-redox potential of FeOCl and its remarkable ability for the production of an overwhelming amount of hydroxyl radicals in a short period of time. The catalyst recovery and reusing test showed that FeOCl is able to endure the harsh conditions of benzene hydroxylation for four runs. The mechanism of benzene hydroxylation using FeOCl as a catalyst in the presence of hydrogen peroxide as an oxidant was also illustrated.

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Section: Introductionmentioning

confidence: 99%

Iron Oxychloride as an Efficient Catalyst for Selective Hydroxylation of Benzene to Phenol

et al. 2018

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“…52 Cresols and naphthols were also observed during direct hydroxylation of alkyl benzenes and naphthalene with N 2 O using HZSM-5. 52 Other studies have also reported formation of phenol by direct hydroxylation of benzene with H 2 O 2 using non-zeolite based catalysts, CuFe 2 O 4 , 57 FePO 4 , 58 and metal/graphene oxide. 59 In this study we investigated the effects of steam on the yield of aromatic hydrocarbons, coke deposits, and formation of phenols during ex situ CFP of biomass using HZSM-5 as the catalyst.…”

Section: Introductionmentioning

confidence: 99%

Catalytic fast pyrolysis of biomass: the reactions of water and aromatic intermediates produces phenols

et al. 2015

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During catalytic upgrading over HZSM-5 of vapors from fast pyrolysis of biomass (ex situ CFP), water reacts with aromatic intermediates to form phenols that are then desorbed from the catalyst micropores and produced as products. We observe this reaction using real time measurement of products from neat CFP and with added steam. The reaction is confirmed when 18 O-labeled water is used as the steam source and the labeled oxygen is identified in the phenol products. Furthermore, phenols are observed when cellulose pyrolysis vapors are reacted over the HZSM-5 catalyst in steam. This suggests that the phenols do not only arise from phenolic products formed during the pyrolysis of the lignin component of biomass; phenols are also formed by reaction of water molecules with aromatic intermediates formed during the transformation of all of the pyrolysis products. Water formation during biomass pyrolysis is involved in this reaction and leads to the common observation of phenols in products from neat CFP. Steam also reduces the formation of non-reactive carbon in the zeolite catalysts and decreases the rate of deactivation and the amount of measured "coke" on the catalyst. These CFP results were obtained in a flow microreactor coupled to a molecular beam mass spectrometer (MBMS), which allowed for real-time measurement of products and facilitated determination of the impact of steam during catalytic upgrading, complemented by a tandem micropyrolyzer connected to a GCMS for identification of the products.

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“…Each approach occur structurally identical products, although their morphology and size were intensively affected by the production pathway. The SCS derived catalyst exhibited superior catalytic characteristics than the one prepared by the solution method, as their yields were measured to be 24.52% and 8.90%, respectively …”

Section: Oxidation Reactionsmentioning

confidence: 98%

Review of Recent Studies on Solution Combustion Synthesis of Nanostructured Catalysts

et al. 2018

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Solution combustion synthesis (SCS) is a relatively new method for synthesizing catalytic materials with many distinct advantages: simplicity of method, short reaction times, and the capability to regulate crystal lattice parameters and thereby the activity and selectivity of catalysts. Over the last years, SCS has been used for the production and study of a multitude of new catalytic materials. This review considers and discusses the recent developments and trends in SCS of nanocatalysts, while special attention is paid to the development and applications of nanostructured catalysts.

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Synthesis of iron orthophosphate catalysts by solution and solution combustion methods for the hydroxylation of benzene to phenol

Cited by 8 publications

References 35 publications

Iron Oxychloride as an Efficient Catalyst for Selective Hydroxylation of Benzene to Phenol

Iron Oxychloride as an Efficient Catalyst for Selective Hydroxylation of Benzene to Phenol

Catalytic fast pyrolysis of biomass: the reactions of water and aromatic intermediates produces phenols

Review of Recent Studies on Solution Combustion Synthesis of Nanostructured Catalysts

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