Factors Affect on the Reaction Performance of the Oxidative Dehydrogenation of n-Butene to 1,3-Butadiene Over Zn-Ferrite Catalysts

Chung, Young-Min; Kwon, Yong-Tak; Kim, Tae Jin; Lee, Seung Jun; Oh, Seung-Hoon

doi:10.1007/s10562-009-9973-3

Cited by 11 publications

(3 citation statements)

References 30 publications

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“…The change in the EPR spectra (Supplementary data) was also consistent with an increase in particle size for all the ferrites. Surprisingly the BET surface area of ferrite catalysts is rarely reported in the literature and even then only pre-reaction [2], so there is little data in the literature to compare with our data. Nevertheless, these are significant losses in surface area, which are due to the presence of steam in the feed [14], yet the loss in area is not reflected in any equivalent loss of activity indicating no direct link between surface area and activity [5].…”

Section: Discussionmentioning

confidence: 74%

“…Nanocrystalline ferrites give unique characterisation fingerprints and from the initial characterisation by AAS, XRD, Raman spectroscopy and EPR it is clear that nanocrystallites of the five ferrites were produced. The XRD revealed that the catalysts were not highly crystalline, which is an important parameter as a lack of highly crystalline material has been shown to be a key factor in the production of an active catalyst [2], as a highly crystalline form inhibits oxygen mobility. XPS revealed that the surface Fe:A 2+ ratio of the ferrites did not match the bulk.…”

Section: Discussionmentioning

confidence: 99%

“…One methodology that is not equilibrium limited is oxidative dehydrogenation (ODH) of butene to produce 1,3-butadiene. Metal ferrites and bismuth molybdates are the two most commonly used groups of catalysts for 1-butene ODH and both have been shown to produce high 1,3-butadiene yields [1][2][3][4][5]. As well as producing 1,3-butadiene by an ODH reaction, ferrite catalysts have been shown to catalyse a number of other side reactions, including: combustion, isomerisation and cracking, however much of the literature discussing butene ODH neglects to mention the minor products of the reaction.…”

Section: Introductionmentioning

confidence: 99%

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Oxidative Dehydrogenation of 1-Butene to 1,3-Butadiene Over Metal Ferrite Catalysts

et al. 2021

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The oxidative dehydrogenation (ODH) of 1-butene to 1,3-butadiene was studied over a series of AFe2O4 catalysts, where A = Zn, Mn, Ni, Cu, Mg and Fe. The catalysts were characterised by XPS, EPR spectroscopy, BET surface area analysis, Raman spectroscopy and XRD. All the ferrites were active for ODH and gave an order of activity after 80 h on-stream of ZnFe2O4 > NiFe2O4 > MnFe2O4 > MgFe2O4 > CuFe2O4 > FeFe2O4. All catalysts lost significant surface area (up to ~ 80%) under reaction conditions of 0.75:1:15 oxygen:1-butene:steam with an overall GHSV of 10,050 h−1 at 693 K. Fe3O4 was unstable under reaction conditions and was converted to Fe2O3, which showed very low activity. Nickel ferrite was the only material that gave carbon dioxide as a significant product, all others were selective to 1,3-butadiene. Zinc ferrite gave a steady-state yield of 1,3-butadiene of ~ 80%. Inversion parameters were determined for the ferrites from XPS and a correlation was obtained between 1,3-butadiene yield and inversion parameter, indicating that Fe3+ in an octahedral hole is a key species in the mechanism of oxidative dehydrogenation. Butene isomerisation and ODH were shown to occur on different sites.

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Section: Discussionmentioning

confidence: 74%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Oxidative Dehydrogenation of 1-Butene to 1,3-Butadiene Over Metal Ferrite Catalysts

et al. 2021

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Oxidative Dehydrogenation of But‐1‐ene at Low Temperature with Copper Ferrite Catalysts

Kiyokawa

Ikenaga

2018

ChemistrySelect

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Oxidative dehydrogenation (ODH) reactions of but-1-ene with copper and iron oxide catalysts were carried out with a fixedbed flow reactor in a temperature range of 230-350 8C at 1-C 4 H 8 (mL/min)/O 2 (mL/min) flow ratios of 5/1, 5/2.5, 5/4, and 5/5 for 100 min. When CuFe 2 O 4 /AC prepared in the presence of activated carbon at a molar ratio of Cu/Fe = 1/2 was used for the ODH under reaction conditions of 270 8C and 1-C 4 H 8 /O 2 = 5/ 5, the highest BD (buta-1,3-diene) yield of 15% for 100 min was achieved. When the usability of the CuFe 2 O 4 structure was evaluated, it was clarified that the ODH and complete oxidation proceeded on copper oxides. In addition, CuFe 2 O 4 /AC mainly advanced the ODH, while CuO and Cu 2 O promoted the complete oxidation. CuFe 2 O 4 /AC catalyst showed the good catalytic performance in the ODH of but-1-ene at a low temperature of 270 8C. According to XRD and XPS analyses of CuFe 2 O 4 /AC, CuO/AC, and Cu 2 O before and after the reaction, most of the crystalline CuO phase changed to the Cu 2 O phase during the ODH, and the Cu 2 O phase was maintained in the ODH. These results indicated that complete oxidation occurred with the Cu 2 O phase. In the case of CuFe 2 O 4 /AC, although Cu species in CuFe 2 O 4 were also reduced to Cu 2 O, many CuFe 2 O 4 structures and Cu 2 + species were maintained. This suggested that the maintenance of the CuFe 2 O 4 structure and Cu 2 + species is important in the production of BD.[a] T.

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Oxidative Dehydrogenation of n‐Butene with V–Mg Complex Oxide with Added Trivalent Metal Oxide

2019

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Oxidative dehydrogenation (ODH) of n‐butene with V−Mg complex oxide catalysts was carried out with a fixed‐bed flow reactor at 480 °C. In order to improve the catalytic performance of V−Mg complex oxide, we examined the effect of added metal oxide on the ODH of n‐butene. When Fe was added to the V−Mg complex oxide, the reactivity of lattice oxygen in the V−Mg complex oxide increased. V−Mg‐Fe(20:30:10) prepared at a molar ratio of V:Mg:Fe=20:30:10 showed high conversion (53.9%) and buta‐1,3‐diene (BD) yield (20.3%) in the ODH with the lattice oxygen. To continuously produce BD, ODH under O2 flow was also investigated. The V−Mg‐Fe(20:30:10) catalyst exhibited higher BD yield than the V−Mg catalyst, and it was indicated that the high reactivity of the lattice oxygen affected the ODH under O2 flow. Moreover, the V−Mg‐Fe(20:30:10)‐800 catalyst calcined at 800 °C showed highly stable ODH activity, and the BD yield (11%) was maintained for 420 min. XRD analysis results of the catalyst showed that the maintenance of the ODH activity could be attributed to the maintenance of the crystalline structure of V−Mg‐Fe(20:30:10)‐800 during the reaction.

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Factors Affect on the Reaction Performance of the Oxidative Dehydrogenation of n-Butene to 1,3-Butadiene Over Zn-Ferrite Catalysts

Cited by 11 publications

References 30 publications

Oxidative Dehydrogenation of 1-Butene to 1,3-Butadiene Over Metal Ferrite Catalysts

Oxidative Dehydrogenation of 1-Butene to 1,3-Butadiene Over Metal Ferrite Catalysts

Oxidative Dehydrogenation of But‐1‐ene at Low Temperature with Copper Ferrite Catalysts

Oxidative Dehydrogenation of n‐Butene with V–Mg Complex Oxide with Added Trivalent Metal Oxide

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