n-Butane dehydrogenation over mono and bimetallic MCM-41 catalysts under oxygen free atmosphere

Ajayi, Babajide Patrick; Jermy, B. Rabindran; Ogunronbi, Kehinde E.; Abussaud, Basim; Al-Khattaf, S.

doi:10.1016/j.cattod.2012.07.013

Cited by 32 publications

(17 citation statements)

References 47 publications

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“…All samples exhibited type IV isotherms, which were typical for MCM‐41 materials. The H1 hysteresis loops in the P / P 0 range of 0.2–0.4, corresponding to capillary condensation, were clear, which reflected that uniform mesopores were obtained , . The pore‐width distribution curves widened as the vanadium content increased, but were all concentrated in the range of 2.4–3.2 nm.…”

Section: Resultsmentioning

confidence: 95%

Synthesis of V‐MCM‐41 Catalysts and Their Application in CO₂‐Assisted Isobutane Dehydrogenation

Wang

Zhou

et al. 2018

Chem Eng & Technol

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A series of V-MCM-41 were in situ synthesized. The textual properties and vanadium species were systematically characterized. The results showed that the catalysts could still maintain a mesoporous structure and high specific surface area. The vanadium species were highly dispersed on the surface, with the coexistence of polymeric vanadium species. Isobutane dehydrogenation was performed by employing CO 2 as a soft oxidant. The results revealed an almost linear relationship between the activity and surface vanadium sites. Isolated vanadium species were more active for isobutane dehydrogenation. The isobutane dehydrogenation reaction in the presence of CO 2 could proceed simultaneously through oxidative dehydrogenation and non-oxidative dehydrogenation followed by the reverse water gas shift reaction.

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Section: Resultsmentioning

confidence: 95%

Synthesis of V‐MCM‐41 Catalysts and Their Application in CO₂‐Assisted Isobutane Dehydrogenation

Wang

Zhou

et al. 2018

Chem Eng & Technol

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“…7 In our previous work, supported Cr-V catalysts were investigated for direct dehydrogenation of n-butane to butadiene 4 . At such high operating condition, thermal cracking of hydrocarbon occurs and frequent catalyst regeneration is required due to coke deposition.…”

Section: Introductionmentioning

confidence: 99%

“…In our previous work, supported Cr-V catalysts were investigated for direct dehydrogenation of n-butane to butadiene. 4 However, as this direct dehydrogenation requires high temperature operation due to thermodynamic equilibration to butadiene, it inevitably causes the formation of excessive coke and quick deactivation of the catalyst. Additionally, co-existence of carbon dioxide in the direct dehydrogenation over the supported Cr-V catalyst was also studied to lower the operation temperature with hydrogen removal by reverse water-gas shift reaction.…”

Section: Introductionmentioning

confidence: 99%

“…This manuscript is a follow-up research work based on n-butane oxidative dehydrogenation. On the other hand, calcination is well-known as an important factor influencing the catalyst structure and properties, such as the dispersion of active sites, 4,5,[31][32][33] the interaction between metal oxide species and support, 7,[34][35][36] and acid-base properties. 8,9,[37][38][39][40] The point of this manuscript is to study the effect of calcination conditions.…”

Section: Introductionmentioning

confidence: 99%

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Influence of calcination on performance of Bi–Ni–O/gamma-alumina catalyst for n-butane oxidative dehydrogenation to butadiene

Jermy

Asaoka

Al-Khattaf

2015

Catal. Sci. Technol.

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Influence of calcination on the binary-metal oxide 30wt%Bi-20wt%Ni-O /gamma-Al 2 O 3 catalyst was studied for n-butane oxidative dehydrogenation to 1,3-butadiene. The importance of the calcination was confirmed with the facts that 1) the two step calcination of more than 2 h at 2 nd step resulted in higher activity and selectivity to butadiene and 2) the second step calcination temperatures showed clear effects on the activity and the selectivity. The activity showed a trend of volcano shape with the top at 590 o C at lower reaction temperature, 400 o C or a down-slope shape at 450 o C. As for the reaction selectivity, either the total dehydrogenation or the specific butadiene selectivity showed a volcano shape with the calcination temperature. The top along the calcination temperature existed at 590 o C in both cases of 400 o C and 450 o C reaction temperatures.Reversely, the selectivity of oxygenate formation (partially followed by cracking) or partial oxidation to CO/H 2 showed a valley shape with the bottom at 590 o C or 650 o C along the calcination temperature, respectively. The butadiene selectivity was more strongly influenced competitively by both of the oxygenate formation and the partial oxidation. From the catalyst characterization, it was observed that the redox and acid/base system (active and selective to the reaction) of the combined oxides with porous structure is formed as the cohabitation consisting of 'hierarchical nano-particles' (NiO, alpha-/beta-Bi 2 O 3 and gamma-Al 2 O 3 ) resulted from the catalyst calcination in a preferable condition. Research highlight• Oxidative dehydrogenation of n-butane to butadiene was studied on Bi-Ni-O/gamma-alumina catalyst. • Condition of catalyst calcination mainly effects on the selectivity. • The calcination temperature results a volcano shape effect on the selectivity. • The selective catalyst by calcination is consisting of hierarchical nano-particle cohabitation. AbstractInfluence of calcination on the binary-metal oxide 30wt%Bi-20wt%Ni-O /gamma-Al 2 O 3 catalyst was studied for n-butane oxidative dehydrogenation to 1,3-butadiene. The importance of the calcination was confirmed with the facts that 1) the two step calcination of more than 2 h at 2 nd step resulted in higher activity and selectivity to butadiene and 2) the second step calcination temperatures showed clear effects on the activity and the selectivity. The activity showed a trend of volcano shape with the top at 590 o C at lower reaction temperature, 400 o C or a down-slope shape at 450 o C. As for the reaction selectivity, either the total dehydrogenation or the specific butadiene selectivity showed a volcano shape with the calcination temperature. The top along the calcination temperature existed at 590 o C in both cases of 400 o C and 450 o C reaction temperatures.Reversely, the selectivity of oxygenate formation (partially followed by cracking) or partial oxidation to CO/H 2 showed a valley shape with the bottom at 590 o C or 650 o C along the calcination temperature, respectively. The b...

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“…This method is good for preparing single crystals, and well-ordered polycrystalline materials. The method was first popularized for growing large single crystal quartz 164 , as well as zeolites [165][166] , but a lot of researchers are using this techniques to grow mixed oxides such as pervoskites 167 , pryrochlores 167 , garnet 168 and Ruddlesden-Popper phase 169 .…”

Section: Pechini Methodsmentioning

confidence: 99%

Plasma oxidation of liquid precursors for complex metal oxides.

Ajayi¹

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This dissertation is a milestone in more ways than one: on a personal level, this work and the Ph.D. degree that accompanies it is an achievement I will treasure for years, and in the context of pushing the envelope of the materials science related energy research, the broader impact of this work is truly remarkable. Thus, I would like to take a moment to thank everyone who has been a part of this journey with me. Ever since I have stepped foot on United States soil I have been overwhelmed with a deluge of support from within

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n-Butane dehydrogenation over mono and bimetallic MCM-41 catalysts under oxygen free atmosphere

Cited by 32 publications

References 47 publications

Synthesis of V‐MCM‐41 Catalysts and Their Application in CO₂‐Assisted Isobutane Dehydrogenation

Synthesis of V‐MCM‐41 Catalysts and Their Application in CO₂‐Assisted Isobutane Dehydrogenation

Influence of calcination on performance of Bi–Ni–O/gamma-alumina catalyst for n-butane oxidative dehydrogenation to butadiene

Plasma oxidation of liquid precursors for complex metal oxides.

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n-Butane dehydrogenation over mono and bimetallic MCM-41 catalysts under oxygen free atmosphere

Cited by 32 publications

References 47 publications

Synthesis of V‐MCM‐41 Catalysts and Their Application in CO2‐Assisted Isobutane Dehydrogenation

Synthesis of V‐MCM‐41 Catalysts and Their Application in CO2‐Assisted Isobutane Dehydrogenation

Influence of calcination on performance of Bi–Ni–O/gamma-alumina catalyst for n-butane oxidative dehydrogenation to butadiene

Plasma oxidation of liquid precursors for complex metal oxides.

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Synthesis of V‐MCM‐41 Catalysts and Their Application in CO₂‐Assisted Isobutane Dehydrogenation

Synthesis of V‐MCM‐41 Catalysts and Their Application in CO₂‐Assisted Isobutane Dehydrogenation