Nature du dépôt formé au cours de l’oxydation en voie humide catalysée du phénol

Keav, Sylvain; Martin, Amélie; Barbier, J.; Duprez, Daniel

doi:10.1016/j.crci.2010.02.001

Cited by 9 publications

(6 citation statements)

References 23 publications

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“…In many studies, traditional HDO catalysts have been deactivated by rapid coke formation 14. The same problem was reported for ceria catalysts in the wet oxidation of phenol at 120–160 °C 71. 72 In the present study, oligomeric products were only detected over pure ceria, and no such species were detected over the ceria–zirconia catalysts.…”

Section: Discussionsupporting

confidence: 75%

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Improved variational analyses using a nonlinear humidity control variable

Ingleby

Lorenc

Ngan

et al. 2012

Quart J Royal Meteoro Soc

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A new humidity analysis variable has been successfully introduced into the Met Office's variational data assimilation system. The new variable uses a transformation consisting of a nonlinear normalization and a link with temperature increments that is a function of background (forecast) humidity. The normalization (which is the more important aspect) makes the new variable's errors more symmetrical and thus better represented by the variational cost function. As in the previous operational system, water vapour and cloud are combined into a single total water variable for the analysis step. The transform is now operational in both global and limited-area systems. The forecast improvements -to the mass as well as the humidity fields -are largest in the Southern Hemisphere and there is a better fit of both background and analysis to humidity-sensitive satellite channels. The results suggest that the transformation is particularly beneficial for the use of satellite data. The transform reduces the problem of negative humidities in the analysis which were more prevalent over the ocean.

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Section: Discussionsupporting

confidence: 75%

“…Kaev et al. reported that this pathway leads to the formation of chromenones, xanthones, and fluorenones as the oligomerization products from the wet oxidation of phenol over ceria‐based catalysts at 160 °C 71…”

Section: Discussionmentioning

confidence: 99%

Improved variational analyses using a nonlinear humidity control variable

Ingleby

Lorenc

Ngan

et al. 2012

Quart J Royal Meteoro Soc

View full text Add to dashboard Cite

show abstract

“…Note that these substances are present on the chromatograms of the reaction mixture at the initial stages over low active catalysts. There may be further polymerization of phenols and intermediate phenol derivatives to form carbonaceous deposits of aromatic nature [6,49]. We cannot completely exclude the oxidation of the carbon support itself during the reaction.…”

Section: Discussionmentioning

confidence: 98%

Ruthenium nanoparticles supported on nitrogen-doped carbon nanofibers for the catalytic wet air oxidation of phenol

Ayusheev

Taran

Seryak

et al. 2014

Applied Catalysis B: Environmental

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“…3. 75 Chen et al compared EDS spectra obtained from the same catalyst before and after phenol WAO experiments and noticed the apparition of a C element corresponding peak. 40 According to Pintar and Levec, the adsorbed species are not soluble into conventional organic solvents.…”

Section: Quintanilla Et Al Attributed the Non Deactivation Of A Fouledmentioning

confidence: 99%

“…4, they extracted and identified aromatic polycyclic compounds from the chromenone, xanthone and fluorenone families. 75 Although of different structures, aromatic dimers and trimers such as hydroxylated biphenyls, diphenyl ethers, dibenzofurans and dibenzodioxins were identified during the phenol liquid-phase elimination by (i) molecular oxygen in supercritical conditions, 77 (ii) Fenton reaction 78 and (iii) adsorption over activated carbon in an oxidizing medium. 79 The formation of these species was attributed to oxidative coupling reactions.…”

Section: Quintanilla Et Al Attributed the Non Deactivation Of A Fouledmentioning

confidence: 99%