Preparation and characterization of CeO2–Al2O3 aerogels supported ruthenium for catalytic wet air oxidation of p-hydroxybenzoic acid

Triki, M.; Ksibi, Zouhaier; Ghorbel, Abdelhamid; Medina, Francisco

doi:10.1007/s10971-011-2452-5

Cited by 12 publications

(8 citation statements)

References 25 publications

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“…Then, 3, 4-dihydroxybenzoic acid was broken down, resulting in the formation of a wide range of cleavage compounds. Moreover, p-HBA occurred in the decarboxylation reaction by the oxidation of ozone and turned into phenol (Triki et al 2011). Phenol was degraded through further hydroxylation of the aromatic ring to hydroquinone and catechol, after that the aromatic ring was broken down to form small molecule acids.…”

Section: Possible Pathway Of P-hba Degradationmentioning

confidence: 99%

Fe3O4/multi-walled carbon nanotubes as an efficient catalyst for catalytic ozonation of p-hydroxybenzoic acid

Bai

Yang

Wang

2015

Int. J. Environ. Sci. Technol.

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Fe 3 O 4 /multi-walled carbon nanotubes were prepared, characterized and used as a nanocatalyst for ozonation of p-hydroxybenzoic acid. The stability and reusability of the catalyst was evaluated. Characterization techniques including X-ray diffraction, Fourier transform infrared absorption spectroscopy, scanning electron microscope, high-resolution transmission electron microscopy and physical property measurement were used to analyze the reason for the decrease in catalyst activity. The addition of t-butanol and bicarbonate were used to explore the different process between hydroxyl radicals and ozone. The experimental results showed that the catalytic ozonation could significantly increase the degradation and mineralization of p-hydroxybenzoic acid. The initial pH value was a crucial factor influencing ozone decomposition and the surface property of catalyst or organic pollutant. The degradation of p-hydroxybenzoic acid increased by 32 % in catalyzed ozonation compared to single ozonation after 5 min reaction with unadjusted pH (about 5.4). In batch experiments, the removal efficiency of p-hydroxybenzoic acid and total organic carbon decreased 36.1 and 6.8 % after six run times. Bicarbonate significantly inhibited the mineralization of p-HBA, but it had almost no influence on the catalytic degradation of p-hydroxybenzoic acid. A possible pathway for p-hydroxybenzoic acid degradation was tentatively proposed.

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Section: Possible Pathway Of P-hba Degradationmentioning

confidence: 99%

Fe3O4/multi-walled carbon nanotubes as an efficient catalyst for catalytic ozonation of p-hydroxybenzoic acid

Bai

Yang

Wang

2015

Int. J. Environ. Sci. Technol.

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“…2 Recently, there has been interest in the synthesis of alumina aerogels because of their potential applications as catalytic substrates, porous membranes, and thermal insulators. [3][4][5] The sol-gel reaction coupled with the supercritical drying process is a common method for the synthesis of alumina aerogels. 6,7 So far, most alumina aerogels reported in the literature are monolithic with varied sizes and shapes.…”

Section: Introductionmentioning

confidence: 99%

Structure and thermal properties of millimeter-scale alumina aerogel beads formed by a modified ball dropping method

Zhu

Fang

2017

RSC Adv.

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“…1). Triki et al [31] also reported a similar reduction profile centered at 220°C with a shoulder at 175°C for Ru/Ce-Al catalyst and assigned them to the reduction of Ru-oxide interacting with CeO 2 and free or dispersive nature of Ru-oxide, respectively. Interestingly, both H 2 consumption peaks were shifted to high-temperature side for 3RCHT sample compared to other samples.…”

Section: Bet Surface Area and Pore Volumementioning

confidence: 70%

Hydrogenolysis of bioglycerol to 1,2-propanediol over Ru/CeO2 catalysts: influence of CeO2 characteristics on catalytic performance

et al. 2014

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Hydrogenolysis of glycerol to 1,2-propanediol is an alternative route for efficient utilization of biomassderived glycerol to value-added chemicals. In this study, catalytic hydrogenolysis of glycerol was systematically investigated over various Ru/CeO 2 catalysts. CeO 2-support was prepared by different methods and Ru deposition by wet impregnation method. Synthesized catalysts were characterized by various techniques, namely, XRD, XPS, TPR, TPD, and other. Hydrothermally synthesized CeO 2supported Ru catalyst showed relatively more number of acid sites with mild acid strength and exhibited highest conversion and product selectivity. Effect of various parameters including Ru loading, reaction temperature, and hydrogen pressure was evaluated and addressed.

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Preparation and characterization of CeO2–Al2O3 aerogels supported ruthenium for catalytic wet air oxidation of p-hydroxybenzoic acid

Cited by 12 publications

References 25 publications

Fe3O4/multi-walled carbon nanotubes as an efficient catalyst for catalytic ozonation of p-hydroxybenzoic acid

Fe3O4/multi-walled carbon nanotubes as an efficient catalyst for catalytic ozonation of p-hydroxybenzoic acid

Structure and thermal properties of millimeter-scale alumina aerogel beads formed by a modified ball dropping method

Hydrogenolysis of bioglycerol to 1,2-propanediol over Ru/CeO2 catalysts: influence of CeO2 characteristics on catalytic performance

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