Effect of steaming on one-step oxidation of benzene to phenol with nitrous oxide over Fe/MFI catalysts

Pillai, Krishnan S; Jia, Jinping; Sachtler, Wolfgang M.H.

doi:10.1016/j.apcata.2003.12.052

Cited by 38 publications

(25 citation statements)

References 19 publications

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“…However, the formation of these complexes is also assumed to occur upon activation treatments of Fe/ZSM-5 prepared by other routes. In contrast, the assumption that Fe 2 sites are the only or most abundant species present in Fe/ZSM-5 samples is no longer supported in part of the recent literature [41,42] (Fig. 8).…”

Section: Binuclear Fe Fementioning

confidence: 58%

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New frontiers in X-ray spectroscopy in heterogeneous catalysis: Using Fe/ZSM-5 as test-system

et al. 2005

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We have applied a number of novel X-ray spectroscopic tools to Fe/ZSM-5 systems. Fe/ZSM-5 can be considered as an ideal test-system for the characterization techniques in heterogeneous catalysis. The existence of a large range of sites and structures creates a good testing ground to determine which experimental tools are able to resolve such complex system. In situ soft X-ray absorption provides important information on the valence and electronic structure of iron during treatments, with a time scale down to 30 s. Kb-detected XANES yields unprecedented resolution for pre-edge structures and using hard X-rays can be used under any condition and treatment, including high-pressures. It can be expected that both in situ soft X-ray absorption and Kb-detected XANES become 'standard' tools for catalysis research, similar to traditional XANES and EXAFS today. The X-MCD is also used in this paper but it will probably remain a rather specialized technique in the field of heterogeneous catalysis. Further new developments for catalysis characterization are for all to be expected from X-ray spectro-microscopy, where one will have the possibility to perform the in situ soft X-ray absorption and Kb-detected XANES experiments with nanometer size spatial resolution. #

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Section: Binuclear Fe Fementioning

confidence: 58%

“…In the past years numerous articles appeared on the identification of binuclear complexes by spectroscopic techniques and chemical probe reactions [1,2,[30][31][32][33][34][35][36][37][38][39]. EXAFS studies have had a leading position for the characterization of these complexes.…”

Section: Binuclear Fe Fementioning

confidence: 99%

New frontiers in X-ray spectroscopy in heterogeneous catalysis: Using Fe/ZSM-5 as test-system

et al. 2005

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“…For the a-site formation to occur, the reduced Fe 2+ atoms should convert into a new stable state, in which they lose their ability to react with O 2 and thus make the step (1) irreversible. The process of the Fe 2+ stabilization appeared to depend on the chemical composition of the matrix and is strongly facilitated by the presence of water vapor [20,26,30,71,78]. Presumably, the stabilization can occur in the form of complex (III), in which Fe 2þ 2 entities are strongly incorporated into a silicate fragment of the zeolite matrix and have a more distant position as compared to complex (II), thus making impossible their reoxidation into the latter complex.…”

Section: Gas Phase Catalytic Oxidation With N 2 Omentioning

confidence: 92%

Nitrous oxide in oxidation chemistry and catalysis: application and production

Parmon

Panov

Uriarte³

et al. 2005

Catalysis Today

223

165

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“…The importance of the reaction stems from the wide-spread industrial use of phenol in the production of antioxidants, agrochemicals and polymers. Numerous attempts have been made on this challenging reaction over Cu supported zeolites [89], Cu-MCM-41 [90], Cu catalysts supported on various oxides and zeolites [91], Fe/MFI, Fe/ZSM-5 [92][93][94] and pioneering work of Panov and Iwamoto [95,96] using various oxidants such as N 2 O, oxygen and H 2 O 2 .…”

Section: Hydroxylation Of Benzene Over As-synthesized Copper Containimentioning

confidence: 99%

Catalytic applications of hydrotalcite-like materials and their derived forms

Srinivasan

2006

Catal Surv Asia

109

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Hydrotalcite-like (HT-like) materials have been studied extensively in the last three decades. Although these materials initially perceived as potential anion exchangers, unrelenting efforts have also been attempted to use them as catalytic materials or as catalytic supports. There are varied ways by which one can use them for catalysis viz.; 1. Use them in as-synthesized form 2. Use them after calcining where the structural integrity of layered lattice is lost 3. Use the interlayer as functional spaces with moieties of catalytic interest 4. Use them after destruction or delamination and restructuring and 5. Use them as support or matrix. In this review, we are reporting the catalytic applications of HT-like materials and their derived forms carried out in our research group for the last 15 years in these various ways, covering reactions such as nitrous oxide decomposition, selective oxidation of organic compounds of industrial relevance and base-catalyzed isomerization of chemicals of perfumery interest. Although this review primarily focuses on our work, wherever applicable, related or relevant works from other groups are also presented to bestow comprehensiveness.

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Effect of steaming on one-step oxidation of benzene to phenol with nitrous oxide over Fe/MFI catalysts

Cited by 38 publications

References 19 publications

New frontiers in X-ray spectroscopy in heterogeneous catalysis: Using Fe/ZSM-5 as test-system

New frontiers in X-ray spectroscopy in heterogeneous catalysis: Using Fe/ZSM-5 as test-system

Nitrous oxide in oxidation chemistry and catalysis: application and production

Catalytic applications of hydrotalcite-like materials and their derived forms

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