Manipulating morphology and surface engineering of spinel cobalt oxides to invoke high catalytic performance for propane oxidation

<div>We investigated how secondary additives for tableting vanadium-aluminum</div><div>mixed-oxides affect the mechanical resistance, surface chemistry, and catalytic performance in</div><div>propane oxidation of tablets based on this material. The secondary additives were magnesium </div><div>oxide, silica, boron nitride, sepiolite, and zinc oxide while graphite was used as the primary</div><div>shaping agent. Our results showed that the changes in mechanical strength and porosity were</div><div>directly related to the softness and ductility of the secondary additive. Overall, we learned that</div><div>when manufacturing catalyst tablets, there is a compromise between mechanical strength and</div><div>loss in mesoporosity and surface area. On the other hand, the components of the formulated</div><div>tablets did not show signs of establishing a chemical interaction with the vanadium-aluminum</div><div>mixed oxide. Therefore, the effects of the additives that we found on the catalytic performance</div><div>were ascribed to the fact that the selected secondary additives may act as co-catalysts during</div><div>propane oxidation. In this sense, boron nitride and sepiolite were best for promoting both the</div><div>reactivity of the catalytic formulations while showing a better productivity of propene. The data</div><div>was interpreted suggesting that the promotion effect may be due to the combination of a redox</div><div>mechanism over the vanadium-aluminum mixed oxide phase and to a surface radical mechanism</div><div>occurring over the active moieties of these secondary additives.</div>

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Effect of Secondary Additives on the Properties of Vanadium-Aluminum Mixed Oxide Catalysts Used in the Oxidation of Propane

10.26434/chemrxiv.12473177 ◽

2020 ◽

Author(s):

Víctor Gabriel Baldovino Medrano ◽

Benjamin Farin ◽

Eric M. Gaigneaux

Keyword(s):

Boron Nitride ◽

Mechanical Strength ◽

Mixed Oxide ◽

Mixed Oxides ◽

Chemical Interaction ◽

Catalytic Performance ◽

Propane Oxidation ◽

Radical Mechanism ◽

Mechanical Resistance ◽

Mixed Oxide Catalysts

<div>We investigated how secondary additives for tableting vanadium-aluminum</div><div>mixed-oxides affect the mechanical resistance, surface chemistry, and catalytic performance in</div><div>propane oxidation of tablets based on this material. The secondary additives were magnesium </div><div>oxide, silica, boron nitride, sepiolite, and zinc oxide while graphite was used as the primary</div><div>shaping agent. Our results showed that the changes in mechanical strength and porosity were</div><div>directly related to the softness and ductility of the secondary additive. Overall, we learned that</div><div>when manufacturing catalyst tablets, there is a compromise between mechanical strength and</div><div>loss in mesoporosity and surface area. On the other hand, the components of the formulated</div><div>tablets did not show signs of establishing a chemical interaction with the vanadium-aluminum</div><div>mixed oxide. Therefore, the effects of the additives that we found on the catalytic performance</div><div>were ascribed to the fact that the selected secondary additives may act as co-catalysts during</div><div>propane oxidation. In this sense, boron nitride and sepiolite were best for promoting both the</div><div>reactivity of the catalytic formulations while showing a better productivity of propene. The data</div><div>was interpreted suggesting that the promotion effect may be due to the combination of a redox</div><div>mechanism over the vanadium-aluminum mixed oxide phase and to a surface radical mechanism</div><div>occurring over the active moieties of these secondary additives.</div>

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The Effect of TiO2 Nanoparticle Size on Photo-Catalytic Performance in Selective Propane Oxidation

International Conference on Computer and Electrical Engineering 4th (ICCEE 2011) ◽

10.1115/1.859841.paper69 ◽

2011 ◽

pp. 427-432

Keyword(s):

Catalytic Performance ◽

Tio2 Nanoparticle ◽

Propane Oxidation ◽

Nanoparticle Size

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In Situ Embedded Pseudo Pd–Sn Solid Solution in Micropores Silica with Remarkable Catalytic Performance for CO and Propane Oxidation

ACS Applied Materials & Interfaces ◽

10.1021/acsami.8b01450 ◽

2018 ◽

Vol 10 (11) ◽

pp. 9220-9224 ◽

Cited By ~ 16

Author(s):

Cheng Rao ◽

Cheng Peng ◽

Honggen Peng ◽

Li Zhang ◽

Wenming Liu ◽

...

Keyword(s):

Solid Solution ◽

Catalytic Performance ◽

Propane Oxidation

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Comparison of Different Metal Doping Effects on Co3O4 Catalysts for the Total Oxidation of Toluene and Propane

Catalysts ◽

10.3390/catal10080865 ◽

2020 ◽

Vol 10 (8) ◽

pp. 865

Author(s):

Weidong Zhang ◽

Paola Anguita ◽

Javier Díez-Ramírez ◽

Claude Descorme ◽

Jose Luis Valverde ◽

...

Keyword(s):

Surface Area ◽

Cobalt Oxide ◽

High Surface ◽

High Surface Area ◽

Propane Oxidation ◽

Cobalt Oxides ◽

Propane Combustion ◽

Total Oxidation ◽

Metal Doped ◽

Mn Doped

Metal-doped (Mn, Cu, Ni, and Fe) cobalt oxides were prepared by a coprecipitation method and were used as catalysts for the total oxidation of toluene and propane. The metal-doped catalysts displayed the same cubic spinel Co3O4 structure as the pure cobalt oxide did; the variation of cell parameter demonstrated the incorporation of dopants into the cobalt oxide lattice. FTIR spectra revealed the segregation of manganese oxide and iron oxide. The addition of dopant greatly influenced the crystallite size, strain, specific surface area, reducibility, and subsequently the catalytic performance of cobalt oxides. The catalytic activity of new materials was closely related to the nature of the dopant and the type of hydrocarbons. The doping of Mn, Ni, and Cu favored the combustion of toluene, with the Mn-doped one being the most active (14.6 × 10−8 mol gCo−1 s−1 at 210 °C; T50 = 224 °C), while the presence of Fe in Co3O4 inhibited its toluene activity. Regarding the combustion of propane, the introduction of Cu, Ni, and Fe had a negative effect on propane oxidation, while the presence of Mn in Co3O4 maintained its propane activity (6.1 × 10−8 mol gCo−1 s−1 at 160 °C; T50 = 201 °C). The excellent performance of Mn-doped Co3O4 could be attributed to the small grain size, high degree of strain, high surface area, and strong interaction between Mn and Co. Moreover, the presence of 4.4 vol.% H2O badly suppressed the activity of metal-doped catalysts for propane oxidation, among them, Fe-doped Co3O4 showed the best durability for wet propane combustion.

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