Bimetallic Ru-Re/γ-Al2O3 catalysts for the catalytic combustion of propane: Effect of the Re addition

Baranowska, Katarzyna; Okal, Janina

doi:10.1016/j.apcata.2015.04.023

Cited by 43 publications

(31 citation statements)

References 45 publications

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“…Catalytic oxidation to carbon dioxide and water is one of the most promising methods for removing VOCs to carbon dioxide and water, since this process occurs at temperatures lower than those adopted by other non-catalytic processes, and can be used for effluent streams containing low VOC concentration [1][2][3][4][5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Total Oxidation of Naphthalene with Zirconia-Supported Cobalt, Copper and Nickel Catalysts

et al. 2017

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ZrO 2 ·nH 2 O (hydrogel) impregnated with transition metals (Cu, Co, and Ni) was studied in this work as a precursor for the synthesis of CuO/ZrO 2 (CuZ), CoO x /ZrO 2 (CoZ), and NiO/ZrO 2 (NiZ) catalysts, employed in the naphthalene oxidation reaction. Fresh and catalytically used materials were characterized by different physicochemical techniques, to compare the bulk and surface behavior, with particular attention to the effect of the supported metal species' properties on the catalytic activity. Techniques such as X-ray diffraction (XRD), temperature programmed reduction (TPR), differential scanning calorimetry (DSC), Brunauer-Emmett-Teller (BET) surface area analyzer, diffuse reflectance spectroscopy (DRS UV-vis), and Raman spectroscopy, allow for establishing structural and textural aspects of the support, as well as the surface coordination and the accessibility of supported species. Results were in agreement with the CuZ > CoZ > NiZ sequence for the activity in naphthalene oxidation reaction. Electronic properties, ionic sizes, oxide phase deposition on the support surface, reducibility, metal-support interaction, and local site symmetry of metals seem to be decisive factors for the catalytic interaction with the gaseous phase.

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Section: Introductionmentioning

confidence: 99%

Total Oxidation of Naphthalene with Zirconia-Supported Cobalt, Copper and Nickel Catalysts

et al. 2017

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“…It is clear that bimetallic NPs can display unique catalytic behavior, and that such behavior can change depending on the way they are prepared. It should be noted that the impregnated 3 % Re/c-Al 2 O 3 catalyst was completely inactive for propane oxidation in the temperature range studied [12]. Thus, the improvement of activity of the RuRe nano-catalysts must be caused by higher dispersion of the Ru phase in these samples i.e., the high surface area of the Ru phase available for reaction, as well as some type of interaction between ruthenium and rhenium which influences reactivity of the ruthenium phase.…”

Section: Methodsmentioning

confidence: 96%

“…For the most active bimetallic RuRe(90:10) nano-catalyst the TOF value [34 9 10 -3 (s -1 )] at 160°C, calculated from the oxidation rate and chemisorption data, is about three times higher than that of the Ru nano-catalyst [11 9 10 -3 (s -1 )] ( Table 2). Our recent results showed that the co-impregnated Ru-Re/c-Al 2 O 3 catalysts, with composition of 90:10 and 75:25 in atomic ratio, were also more active as compared to the Ru catalyst prepared by the conventional method [12]. However, the TOF value for the most active co-impregnated Ru-Re(90:10)/c-Al 2 O 3 catalyst was two times lower [16.1 9 10 -3 (s -1 ), at 150°C] than for the bimetallic RuRe(90:10) nano-catalyst.…”

Section: Methodsmentioning

confidence: 96%

“…A reaction gas mixture containing propane (5000 vppm) and air was fed through the catalyst (0.1 g) at a flow rate of 100 ml/min [12]. The reactants and products were analyzed by online gas chromatography.…”

Section: Methodsmentioning

confidence: 99%

“…We recently found [12] that enhancement in catalytic activity for the total propane oxidation may be achieved by using bimetallic Ru-Re/c-Al 2 O 3 catalysts, which were prepared by the co-impregnation method. Literature data also show that activity of noble metal catalysts (Pt, Pd) used for the VOCs oxidation may be modified by the presence of second active component like vanadium, tungsten, molybdenum or niobium [13].…”

Section: Introductionmentioning

confidence: 99%

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Microwave Assisted Polyol Synthesis of the Bimetallic RuRe Nanoparticles Deposited on γ-Alumina and their Application for the Light Alkane Oxidation

Baranowska

Okal

2016

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The RuRe nanoparticles (NPs) deposited on cAl 2 O 3 were prepared in a one step by a microwave-polyol method and tested in the total oxidation of short chain alkanes under O 2 -rich conditions. The used preparation method favored the formation of spherical metallic RuRe NPs with the mean particle size of 1.6 nm (Ru:Re = 90:10) and 2.1 nm (Ru:Re = 75:25), (HRTEM studies) and dispersion of 26 and 31 %, respectively (H 2 chemisorption data). The Ru nano-catalyst exhibited larger Ru NPs (2.9 nm) with lower degree of dispersion (19 %). The activity of the bimetallic RuRe nano-catalysts for the total oxidation of propane, used as a model compound, was higher compared to that of the Ru nano-catalyst. The superior catalytic performance of the former catalysts, especially of the sample with the low Re loading (1 wt%, RuRe = 90:10, 0.6-3 nm particle size), could be correlated with a high ruthenium dispersion (H/Ru = 31 %), i.e., the high surface area of the Ru phase available for reaction, and to the higher intristic activity caused by the synergy effect between Re and Ru. Moreover, the RuRe nano-catalysts exhibited better stability with respect to the Ru nano-catalyst under used reaction conditions.

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Catalytic partial oxidation of CH₄ over bimetallic Ni‐Re/Al₂O₃: Kinetic determination for application in microreactor

et al. 2017

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The activity of a novel Ni-Re/Al 2 O 3 catalyst toward partial oxidation of methane was investigated in comparison with that of a precious-metal Rh/Al 2 O 3 catalyst. Reactions involving CH 4 /O 2 /Ar, CH 4 /H 2 O/Ar, CH 4 /CO 2 /Ar, CO/O 2 /Ar, and H 2 /O 2 /Ar were performed to determine the kinetic expressions based on indirect partial oxidation scheme. A mathematical model comprising of Ergun equation as well as mass and energy balances with lumped indirect partial oxidation network was applied to obtain the kinetic parameters and then used to predict the reactant and product concentrations as well as temperature profiles within a fixed-bed microreactor. H 2 and CO production as well as H 2 /CO 2 and CO/CO 2 ratios from the reaction over Ni-Re/Al 2 O 3 catalyst were higher than those over Rh/Al 2 O 3 catalyst. Simulation revealed that much smoother temperature profiles along the microreactor length were obtained when using Ni-Re/Al 2 O 3 catalyst. Steep hot-spot temperature gradients, particularly at the entrance of the reactor, were, conversely, noted when using Rh/Al 2 O 3 catalyst.

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Bimetallic Ru-Re/γ-Al2O3 catalysts for the catalytic combustion of propane: Effect of the Re addition

Cited by 43 publications

References 45 publications

Total Oxidation of Naphthalene with Zirconia-Supported Cobalt, Copper and Nickel Catalysts

Total Oxidation of Naphthalene with Zirconia-Supported Cobalt, Copper and Nickel Catalysts

Microwave Assisted Polyol Synthesis of the Bimetallic RuRe Nanoparticles Deposited on γ-Alumina and their Application for the Light Alkane Oxidation

Catalytic partial oxidation of CH₄ over bimetallic Ni‐Re/Al₂O₃: Kinetic determination for application in microreactor

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Bimetallic Ru-Re/γ-Al2O3 catalysts for the catalytic combustion of propane: Effect of the Re addition

Cited by 43 publications

References 45 publications

Total Oxidation of Naphthalene with Zirconia-Supported Cobalt, Copper and Nickel Catalysts

Total Oxidation of Naphthalene with Zirconia-Supported Cobalt, Copper and Nickel Catalysts

Microwave Assisted Polyol Synthesis of the Bimetallic RuRe Nanoparticles Deposited on γ-Alumina and their Application for the Light Alkane Oxidation

Catalytic partial oxidation of CH4 over bimetallic Ni‐Re/Al2O3: Kinetic determination for application in microreactor

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Catalytic partial oxidation of CH₄ over bimetallic Ni‐Re/Al₂O₃: Kinetic determination for application in microreactor