Total oxidation of naphthalene with high selectivity using a ceria catalyst prepared by a combustion method employing ethylene glycol

Aranda, Asunción; López, José Manuel; Murillo, R.; Mastral, A.M.; Dejoz, Ana; Vázquez, Isaac Amigo; Solsona, Benjamín; Taylor, Stuart Hamilton; Garcı́a, Tomás

doi:10.1016/j.jhazmat.2009.06.013

Cited by 29 publications

(14 citation statements)

References 34 publications

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“…A catalytic activity of 90% conversion to carbon dioxide, using a space velocity of 25,000 h -1 was achieved at only 190ºC with the ceria nanoparticles, which is amongst the best ceria catalysts reported in the literature to date [16,19,[23][24][25][26]. This high activity is believed to be related to the high surface area and small crystallite size of the nanoparticles, as previously reported in the literature [16,[19][20]. Accordingly, a decrease in activity is observed as the surface area decreases and the crystalline size increases from ceria nanoparticles to nanorods and nanocubes.…”

Section: Oxidation Of Naphthalenesupporting

confidence: 69%

“…Previous studies have focused on the influence of the ceria nanoparticles' preparation variables, with the aim of determining which catalyst features are required for naphthalene total oxidation as PAHs model compound. Factors such as crystallite size, surface area and oxygen defect concentration have been identified as key parameters [19][20].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Shape-dependency activity of nanostructured CeO2 in the total oxidation of polycyclic aromatic hydrocarbons

Torrente‐Murciano¹,

Gilbank²,

Puértolas³

et al. 2013

Applied Catalysis B: Environmental

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182

127

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A morphological phase diagram is determined to relate the effect of base concentration and temperature during the hydrothermal synthesis with the final ceria nanostructured morphology. Representative samples of nanoparticles, nanorods and nanocubes have been characterised by XRD, N 2 adsorption, TEM, XPS and Raman and catalytically tested for the total oxidation of naphthalene as a model polycyclic aromatic hydrocarbon. Ceria nanoparticles present the highest surface area and smallest crystalline size, leading to the most active of these structures. However if the catalytic activity is normalized by unit of surface area, the observed reactivity trend (nanorods < nanocubes < nanoparticles) is directly related to the concentration of surface oxygen vacancies as a result of the exposure of the (110) and (100) preferential planes.

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Section: Oxidation Of Naphthalenesupporting

confidence: 69%

Section: Introductionmentioning

confidence: 99%

Shape-dependency activity of nanostructured CeO2 in the total oxidation of polycyclic aromatic hydrocarbons

Torrente‐Murciano¹,

Gilbank²,

Puértolas³

et al. 2013

Applied Catalysis B: Environmental

Self Cite

182

127

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“…The combustion technique is a fast, simple and energy saving method which is based on the redox reaction between an organic compound (fuel) and oxidizer agent, including sulfates, nitrates and carbonates [31,32]. A wide variety of organic compounds such as urea [33], glycine [34,35], citric acid [36], ethylene glycol [37], starch [38] and a mixture of them [39] have been used through combustion method.…”

Section: Introductionmentioning

confidence: 99%

WITHDRAWN: Fabrication of Nimo Nanostructured Catalyst via Ultrasonic-Assisted Combustion Method Used in High Efficiency Thiophene Hydrodesulfurization: Influence of Organic Compound Type

Hamidi¹,

Khoshbin²,

Karimzadeh³

2020

Preprint

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Alumina supported NiMo nanocatalysts were synthesized through ultrasonic-assisted combustion method with various organic additives, including citric acid, ethylene glycol, glycine and urea using in hydrodesulfurization of thiophene at atmospheric pressure. The samples were characterized by XRD, TGA, FESEM, EDX, BET-BJH and TPR analyses. The results indicated that the type of organic compound has a noticeable effect on phase structure, surface morphology and reducibility potential as a consequence of different amount of heat and gaseous products released during combustion reaction. Our method showed that a relatively homogeneous distribution of the active material over the support can be achieved. Using citric acid as an organic additive, led to synthesis of nanocatalyst in which more than 90% of particles are less than 70 nm. The sample synthesized by citric acid exhibited the highest activity in hydrodesulfurization reaction due to its significant properties such as high surface area, considerable surface hole and weakened metal-support interaction compared with other organic additives. In addition, activity assessment of the prepared catalyst by ethylene glycol and glycine demonstrated that 100% abatement of thiophene can be achieved at 105 °C and 30 min.

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“…In the case of VOCs, and particularly in the case of the oxidation of the remaining hydrocarbons (HC), the following oxidic systems and compounds have been reported as being active: Co 3 O 4 , MnO 2 , CeO 2 , and CuO [21][22][23][24][25][26][27][28][29][30][31]. The combustion reaction of particulate matter has been extensively studied in recent decades, identifying catalysts with very diverse active phases [32][33][34][35][36][37][38][39][40][41].…”

Section: Introductionmentioning

confidence: 99%

Zirconia-Supported Silver Nanoparticles for the Catalytic Combustion of Pollutants Originating from Mobile Sources

et al. 2019

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This work presents the physicochemical characterization and activity of zirconia-supported silver catalysts for the oxidation of pollutants present in diesel engine exhaust (propane, propene, naphthalene and soot). A series of silver-supported catalysts AgxZ (x = 1, 5 and 10 wt.%, Z = zirconia) were prepared, which were studied by various characterization techniques. The results show that silver is mainly found under the form of small metal nanoparticles (<10 nm) dispersed over the support. The metallic phase coexists with the AgOx oxidic phases. Silver is introduced onto the zirconia, generating Ag–ZrO2 catalysts with high activity for the oxidation of propene and naphthalene. These catalysts also show some activity for soot combustion. Silver species can contribute with zirconia in the catalytic redox cycle, through a synergistic effect, providing sites that facilitate the migration and availability of oxygen, which is favored by the presence of structural defects. This is a novel application of the AgOx–Ag/ZrO2 system in the combustion reaction of propene and naphthalene. The results are highly promising, given that the T50 values found for both model molecules are quite low.

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Total oxidation of naphthalene with high selectivity using a ceria catalyst prepared by a combustion method employing ethylene glycol

Cited by 29 publications

References 34 publications

Shape-dependency activity of nanostructured CeO2 in the total oxidation of polycyclic aromatic hydrocarbons

Shape-dependency activity of nanostructured CeO2 in the total oxidation of polycyclic aromatic hydrocarbons

WITHDRAWN: Fabrication of Nimo Nanostructured Catalyst via Ultrasonic-Assisted Combustion Method Used in High Efficiency Thiophene Hydrodesulfurization: Influence of Organic Compound Type

Zirconia-Supported Silver Nanoparticles for the Catalytic Combustion of Pollutants Originating from Mobile Sources

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