An attempt to explain the role of CO2 and N2O as gas dopes in the feed in the oxidative dehydrogenation of propane

Dury, Frédéric; Gaigneaux, Éric M.; Ruíz, Patricio

doi:10.1016/s0920-5861(03)00120-2

Cited by 35 publications

(19 citation statements)

References 21 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…In most of the papers on the catalytic reactions of hydrocarbons with carbon dioxide an observation prevails, that introduction of CO 2 into the feed can decrease significantly (or even suppress) the coke deposition in comparison with the reaction under an inert gas atmosphere [6][7][8][9][10][11][12][13][14][15][16]. It is unquestionable that carbon dioxide is adsorbed on basic centers and after activation on the catalyst surface it can act as a mild oxidant capable to remove the carbonaceous deposit in the Boudouard reaction [17].…”

Section: Introductionmentioning

confidence: 99%

Deactivation of VMgO x Catalysts by Coke in the Process of Isobutane Dehydrogenation with Carbon Dioxide

Ogonowski

Skrzyńska

2007

Catal Lett

View full text Add to dashboard Cite

The process of isobutane dehydrogenation in the presence or absence of carbon dioxide was carried out over VMgO x catalysts with different vanadium loading. The performed tests show that both the reaction atmosphere and physicochemical properties of the catalysts (related to vanadium content) have a great influence on the activity decrease and the carbonaceous deposit formation. Despite small ability of carbon dioxide to remove coke in the Boudouard reaction, the amounts of carbonaceous species deposited on the catalysts after the isobutane dehydrogenation under CO 2 atmosphere were even twice greater in comparison to those deposited in helium stream. Moreover, the rate of coke deposition during the dehydrogenation in the inert gas flow was only slightly dependent on the reaction time, in contrast to the process in carbon dioxide atmosphere. The results show that the coke formation on VMgO x is enhanced predominantly by surface acidity of the catalysts, which grows with the vanadium content and the presence of CO 2 in the feed.

show abstract

Section: Introductionmentioning

confidence: 99%

Deactivation of VMgO x Catalysts by Coke in the Process of Isobutane Dehydrogenation with Carbon Dioxide

Ogonowski

Skrzyńska

2007

Catal Lett

View full text Add to dashboard Cite

show abstract

“…Thus in these works, CO 2 acted as a modulator of the oxidative properties of oxygen (Dury et al, 2003a;Park and Ansari, 2013). Among the advantages of CO 2 introduction in the system are lower tendency for hydrocarbons combustion (whilst minimizing hot spot formation) and decrease in coking effect (Dury et al, 2003b). Urlan et al (2008) reported that the ODH of n-butane over titanium pyrophosphate (TiP 2 O 7 ) can be enhanced by co-feeding CO 2 in the system.…”

Section: Catalytic Systems For Co 2 -Odh Of Alkanesmentioning

confidence: 99%

CO2 as an Oxidant for High-Temperature Reactions

Kawi

Kathiraser

2015

Front. Energy Res.

View full text Add to dashboard Cite

This paper presents a review on the developments in catalyst technology for the reactions utilizing CO 2 for high-temperature applications. These include dehydrogenation of alkanes to olefins, the dehydrogenation of ethylbenzene to styrene, and finally CO 2 reforming of hydrocarbon feedstock (i.e., methane) and alcohols. Aspects on the various reaction pathways are also highlighted. The literature on the role of promoters and catalyst development is critically evaluated. Most of the reactions discussed in this review are exploited in industries and related to on-going processes, thus providing extensive data from literature. However, some reactions, such as CO 2 reforming of ethanol and glycerol, which have not reached industrial scale, are also reviewed owing to their great potential in terms of sustainability, which is essential as energy for the future. This review further illustrates the building-up of knowledge that shows the role of support and catalysts for each reaction and the underlying linkage between certain catalysts, which can be adapted for the multiple CO 2 -related reactions.

show abstract

“…Molybdenum compounds have shown low catalytic activity; nevertheless, different molybdates, such as NiMoO 4, have higher conversions than those obtained with vanadiumbased materials, with a lower selectivity [12][13][14]. Additionally, transition metal mixed oxides of Mo, V, Fe, Co, Ce, Mn, Te have been studied before, and they have shown a good catalytic activity in oxidative dehydrogenation [15][16][17].…”

Section: Introductionmentioning

confidence: 99%

Oxidative dehydrogenation of propane with cobalt, tungsten and molybdenum based materials

Salamanca

Licea

Echavarría-Isaza

et al. 2017

Rev. Fac. Ing. Univ. Antioquia

View full text Add to dashboard Cite

ABSTRACT:Oxidative dehydrogenation of propane is a reliable alternative for olefins production. This paper presents the results obtained on oxidative dehydrogenation of propane by using two materials based on cobalt, tungsten, and molybdenum. The materials were characterized by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), temperature programmed reduction (TPR), thermogravimetric analysis (TGA), and differential thermal analysis (DTA). The CoMoϕy material was calcined at 623 K, transforming itself to β-CoMoO4 phase (CoMoϕ623), the same phase is observed when the material is calcined at 873 K (CoMoϕy873). CoMoϕy623 showed the best performance in oxidative dehydrogenation of propane, a yield to propene of 3.4% was obtained at 623 K using a space velocity of 100 mLg-1min-1. CoWsϕy was calcined at 673 K, a low crystallinity wolframite was obtained. This material has a high selectivity to propene and low yield. CoMoϕy873 has a selectivity and conversion within the range of the results reported in the literature. This is a prospective catalyst for the oxidative dehydrogenation of propane; it was stable for 24 h of continuous operation at 773 K. RESUMEN:La deshidrogenación oxidativa de propano es una alternativa interesante para la obtención de olefinas. En este trabajo se presentan los resultados obtenidos en la deshidrogenación oxidativa de propano utilizando dos materiales a partir de cobalto, tungsteno y molibdeno. Los materiales fueron caracterizados utilizando Difracción de Rayos X (XRD), espectroscopia infrarroja con transformada de Fourier (FTIR), análisis termogravimétrico (TGA) y análisis térmico diferencial (DTA). El material CoMoϕy al ser calcinado a 623 K se transforma en la fase β-CoMoO4 (CoMoϕy623), la misma fase es obtenida cuando el material se calcina a 873 K (CoMoϕy873). CoMoϕy623 muestra un buen desempeño en la deshidrogenación oxidativa de propano, se obtuvo un rendimiento a propeno de 3,4% a una temperatura de 623 K y una velocidad espacial de 100 mL g-1 min-1. El material CoWsϕy fue calcinado a 673 K, obteniéndose una fase wolframita de baja cristalinidad. Este material presenta una alta selectividad a propeno y un bajo rendimiento. CoMoϕy873 presenta una buena actividad y selectividad, comparable con otros materiales reportados en la literatura, y su potencial como catalizador en la deshidrogenación oxidativa de propano se hace más evidente con la prueba que muestra ser estable durante 24 h de operación continua a 773 K.

show abstract

An attempt to explain the role of CO2 and N2O as gas dopes in the feed in the oxidative dehydrogenation of propane

Cited by 35 publications

References 21 publications

Deactivation of VMgO x Catalysts by Coke in the Process of Isobutane Dehydrogenation with Carbon Dioxide

Deactivation of VMgO x Catalysts by Coke in the Process of Isobutane Dehydrogenation with Carbon Dioxide

CO2 as an Oxidant for High-Temperature Reactions

Oxidative dehydrogenation of propane with cobalt, tungsten and molybdenum based materials

Contact Info

Product

Resources

About