Octenes and Aromatics from the Oxidative Dehydrogenation of n-Octane over Co/TiO2 Catalysts

Gounden, Narainamah; Friedrich, Holger B.; Mahadevaiah, N.; Fadlalla, Mohamed I.

doi:10.1007/s10562-014-1368-4

Cited by 5 publications

(7 citation statements)

References 35 publications

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“…Such catalysts are employed in ODH, with common supports such as Al 2 O 3 , TiO 2 , ZrO 2 , MgO, and SiO 2 . Other studies have also involved the use of supports such as hydrotalcite, rare earth metals, and SBA-15, to mention a few [17][18][19]. These systems work on the basis of the reducibility of the active metals and the acid base characteristics of the catalyst and have shown interesting results.…”

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confidence: 99%

Effects of Modifying Acidity and Reducibility on the Activity of NaY Zeolite in the Oxidative Dehydrogenation of n-Octane

2020

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Non-coking stable alkaline earth metal (M = Mg, Sr, and Ba) modified Ga-NaY catalysts were prepared by ionic-exchange and tested in oxidative dehydrogenation (ODH) of n-octane using air as the source of oxygen. The role of the alkaline earth metals in NaY was to poison the acid sites while enhancing the basic sites responsible for ODH. The exception was the calcium modified NaY, which was more acidic than the parent NaY, coking and unstable under the ODH conditions used in this study. The role of gallium was to enhance the dehydrogenation pathway and improve the stability of NaY. The sequence of increasing selectivity to octenes followed the order: CaGa-NaY < Ga-NaY< MgGa-NaY < SrGa-NaY < BaGa-NaY. The highest octene selectivity obtained was 37% at iso-conversion of 6 ± 1% when BaGa-NaY was used at a temperature of 450 °C. The activity of the catalysts was directly proportional to the reducibility of the catalysts, which is in agreement with expectations.

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Effects of Modifying Acidity and Reducibility on the Activity of NaY Zeolite in the Oxidative Dehydrogenation of n-Octane

2020

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“…Co is also an interesting catalyst for ODH with a unique mechanism, as the Co 2+ itself is difficult to be reduced (figures 12(d)-(e)) [124,126]. It was reported that Co/TiO 2 catalysts reached the best performance at the Co content of about 7.6%, with an ethene selectivity of 65% and ethene yield of 13.3%.…”

Section: Nickel Oxide and Cobalt Catalystsmentioning

confidence: 99%

Boron nitride materials as emerging catalysts for oxidative dehydrogenation of light alkanes

Xu¹,

Ge²,

Sun³

et al. 2022

Nanotechnology

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Light olefins (C2–C4) play a crucial role as basic ingredients in chemical industry, and oxidative dehydrogenation (ODH) of light alkanes to olefins has been one of the popular routes since the shale gas revolution. ODH of light alkanes has advantages on energy-and-cost saving as compared with traditional direct dehydrogenation, but it is restricted by its overoxidation which results in the relatively low olefin selectivity. Boron nitride (BN), an interesting nanomaterial with an analogous structure to graphene, springs out and manifests the superior performance as advanced catalysts in ODH, greatly improving the olefin selectivity under high alkane conversion. In this review, we introduce BN nanomaterials in four dimensions together with typical methods of syntheses. Traditional catalysts for ODH are also referred as comparison on several indicators—olefin yields and preparation techniques, including the metal-based catalysts and the non-metal-based catalysts. We also surveyed the BN catalysts for ODH reaction in recent five years, focusing on the different dimensions of BN together with the synthetic routes accounting for the active sites and the catalytic ability. Finally, an outlook of the potential promotion on the design of BN-based catalysts and the possible routes for the exploration of BN-related catalytic mechanisms are proposed.

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“…5−7 Previous work has shown that TiO 2 has a low tendency to combust n-octane and its desired selective oxidation products, octene isomers. 8 However, the work focused on the activity of the anatase phase. In recently published work, we showed that a single mixture of anatase and rutile (75:25) gave the best selectivity to olefins compared to a host of other metal oxides.…”

Section: Introductionmentioning

confidence: 99%

“…Titanium dioxide (TiO 2 ) is an extensively investigated catalyst and gas sensor material . Much of the work done with TiO 2 is related to its application in photocatalysis. − However, several studies have focused on TiO 2 as a support or carrier in the oxidative activation of short-chain alkanes. − Previous work has shown that TiO 2 has a low tendency to combust n -octane and its desired selective oxidation products, octene isomers . However, the work focused on the activity of the anatase phase.…”

Section: Introductionmentioning

confidence: 99%

Effect of the TiO₂ Anatase/Rutile Ratio and Interface for the Oxidative Activation of n-Octane

et al. 2020

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TiO2 catalysts with a varied composition of anatase and rutile were prepared and tested for the oxidative activation of n-octane. The rutile phase of TiO2 was found to be inactive due to its relatively low reducibility and surface area. The anatase phase, however, was active. Also, a mixture of anatase and rutile, with an excess of rutile, favored the formation of octene isomers during the oxidative activation of alkane. The favorable activity of TiO2 with an excess of the rutile phase was attributed to its enhanced redox properties brought about by the disorder of the TiO2 lattice at the anatase–rutile junction.

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Octenes and Aromatics from the Oxidative Dehydrogenation of n-Octane over Co/TiO2 Catalysts

Cited by 5 publications

References 35 publications

Effects of Modifying Acidity and Reducibility on the Activity of NaY Zeolite in the Oxidative Dehydrogenation of n-Octane

Effects of Modifying Acidity and Reducibility on the Activity of NaY Zeolite in the Oxidative Dehydrogenation of n-Octane

Boron nitride materials as emerging catalysts for oxidative dehydrogenation of light alkanes

Effect of the TiO₂ Anatase/Rutile Ratio and Interface for the Oxidative Activation of n-Octane

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Octenes and Aromatics from the Oxidative Dehydrogenation of n-Octane over Co/TiO2 Catalysts

Cited by 5 publications

References 35 publications

Effects of Modifying Acidity and Reducibility on the Activity of NaY Zeolite in the Oxidative Dehydrogenation of n-Octane

Effects of Modifying Acidity and Reducibility on the Activity of NaY Zeolite in the Oxidative Dehydrogenation of n-Octane

Boron nitride materials as emerging catalysts for oxidative dehydrogenation of light alkanes

Effect of the TiO2 Anatase/Rutile Ratio and Interface for the Oxidative Activation of n-Octane

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Effect of the TiO₂ Anatase/Rutile Ratio and Interface for the Oxidative Activation of n-Octane