Study of benzene hydrogenation catalyzed by nickel supported on alumina in a fixed bed reactor

Peyrovi, M. H.; Toosi, Mohammad Reza

doi:10.1007/s11144-008-5277-7

Cited by 25 publications

(9 citation statements)

References 11 publications

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“…Nickel supported on c-alumina (Ni/c-Al 2 O 3 ) was applied to the vapour phase hydrogenation of benzene. The conversion enhanced with increasing the nickel content and reached maximum values in the temperature range of 120-160°C [5]. It is well known that the Ni metal predominantly catalyzes the hydrogenation of C=C bond rather than C=O bond when both double bonds are present in the reactant.…”

Section: Introductionmentioning

confidence: 97%

Vapour Phase Hydrogenation of Cinnamaldehyde over Ni/γ-Al2O3 Catalysts: Interesting Reaction Network

Chin

Lin

2009

Catal Lett

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The vapour phase hydrogenation of cinnamaldehyde over Ni loading c-Al 2 O 3 catalysts was performed at 1 atm and 300°C in a fixed-bed reactor. The major product was hydrocinnamaldehyde. Unexpected products of styrene and ethylbenzene due to new reaction pathway of hydrodeformylation were observed. The results indicated that Ni metal was the active centers and the catalytic activity was parallel to the Ni surface area. The stability of TOF values implied that the cinnamaldehyde hydrogenation over Ni/cAl 2 O 3 catalysts was a structure insensitive reaction.

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Section: Introductionmentioning

confidence: 97%

Vapour Phase Hydrogenation of Cinnamaldehyde over Ni/γ-Al2O3 Catalysts: Interesting Reaction Network

Chin

Lin

2009

Catal Lett

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“…Moreover, molybdenum and tungsten carbides show a good activity for dehydroaromatization of light alkanes. Due to the importance of aromatics such as benzene for producing chemical compounds in the chemical industries [12], selective conversion of light alkanes to the aromatics over molybdenum and tungsten supported on ZSM-5 has been studied [13][14][15][16]. It has been reported that the formation of olefin species occurs on the metallic carbide sites, which is formed from the reduction of WO x and MoO x species by feedstock in the early stage of the reaction.…”

Section: Introductionmentioning

confidence: 99%

Conversion of n-heptane to LPG and aromatics over Mo2C and W2C catalysts supported on ZSM-5

Toosi

Peyrovi

Mondgarian³

2009

React Kinet Catal Lett

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We have investigated the catalytic activity of W 2 C/HZSM-5 and Mo 2 C/ HZSM-5 for conversion of n-heptane to LPG and aromatic products. The results show that the catalytic activity of the metallic carbides increases markedly in the presence of ZSM-5. For pure carbides, the main cracking products are methane and ethane as a result of the cleavage of the C-C bond at the end of the hydrocarbon chain. In contrast, the zeolitic catalysts produce LPG (propane, i-butane, and n-butane) through the cleavage of C-C bond in the medial bonds. It is observed that the metallic carbides play a key role in producing the aromatics, concerning the formation of olefin species and cyclization of them in the channels of zeolite.

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“…[16] Another possible reason for the decrease in activity, as demonstrated by Loiha et al, [17] who studied Pt-Pd/HBEA (HBEA: zeolite beta in proton form) systems in toluene hydrogenation, is a drop in the catalyst selectivity toward methylcyclohexane: above 400 K, cracking products (cyclohexane and methane) appear. The reaction of hydrogenation occurs at low temperatures, whereas the reverse reaction of dehydrogenation occurs at higher temperatures.…”

Section: Resultsmentioning

confidence: 99%

“…The reaction of hydrogenation occurs at low temperatures, whereas the reverse reaction of dehydrogenation occurs at higher temperatures. [16] Another possible reason for the decrease in activity, as demonstrated by Loiha et al, [17] who studied Pt-Pd/HBEA (HBEA: zeolite beta in proton form) systems in toluene hydrogenation, is a drop in the catalyst selectivity toward methylcyclohexane: above 400 K, cracking products (cyclohexane and methane) appear. However, we did not observe the cracking products; the only product was methylcyclohexane.…”

Section: Resultsmentioning

confidence: 99%

New Promising Iridium Catalyst for Toluene Hydrogenation

2011

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The use of an iridium active phase and magnesium fluoride as a support allowed us to obtain new catalysts of high activities in the hydrogenation of toluene. The Ir/MgF2 catalyst was four times more active than the iridium system supported on commercial Al2O3. The nature of iridium precursors [H2IrCl6 or Ir4(CO)12] and catalyst pretreatment conditions (reduction or oxidation/reduction) appeared to have a clear effect on the activity of Ir/MgF2 catalysts. For the catalysts obtained from iridium carbonyl, the highest activity was obtained after direct reduction of the catalysts, whereas for the catalysts obtained from hexachloroiridium acid, the highest activity was obtained after reduction of the preliminary oxidized catalysts.

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Study of benzene hydrogenation catalyzed by nickel supported on alumina in a fixed bed reactor

Cited by 25 publications

References 11 publications

Vapour Phase Hydrogenation of Cinnamaldehyde over Ni/γ-Al2O3 Catalysts: Interesting Reaction Network

Vapour Phase Hydrogenation of Cinnamaldehyde over Ni/γ-Al2O3 Catalysts: Interesting Reaction Network

Conversion of n-heptane to LPG and aromatics over Mo2C and W2C catalysts supported on ZSM-5

New Promising Iridium Catalyst for Toluene Hydrogenation

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