Catalytic C<sub>6</sub>-Dehydrocyclisation of Aliphatic Hydrocarbons on Oxide Catalysts

Rozengart, M. I.; Kazanskii, B. A.

doi:10.1070/rc1971v040n09abeh001965

Cited by 27 publications

(2 citation statements)

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“…The Zelinskii-Kazanskii reaction (thermal cyclotrimerization of acetylene that proceeds on the carbon catalyst) is the most well known and widely used reaction of the formation of the aromatic com pound benzene [10]:…”

Section: Methodsmentioning

confidence: 99%

On possible processes of the formation of carbon nanomaterials with electrodischarge treatment of hydrocarbons

Yushchishina

Кускова

Chelpanov

2015

Surf. Engin. Appl.Electrochem.

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Possible mechanisms of the formation of carbon nanomaterials (CNMs) with the electrodischarge treatment (EDT) of liquid hydrocarbons are proposed. It is shown that the EDT of hydrocarbons results in a cascade of chemical transformations such as destruction (breaking of C-C bonds), dehydrogenization (breaking of C-H bonds), and polymerization (formation of new C-C bonds). The qualitative and quanti tative composition of all EDT products (gaseous, insoluble solid CNM, and substances dissolved in the initial liquid) may be widely varied and significantly depend on the organic liquid used.

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Section: Methodsmentioning

confidence: 99%

On possible processes of the formation of carbon nanomaterials with electrodischarge treatment of hydrocarbons

Yushchishina

Кускова

Chelpanov

2015

Surf. Engin. Appl.Electrochem.

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“…Data obtained with 4-phenyl-1-butene, which is one of the dehydrogenation products of n-butylbenzene, indicate that the side-chain unsaturation enhances cyclization, especially in the acid-catalyzed mechanism (Csicsery, 1968). The formation of alkenes has been considered as an indispensable step also in alkane aromatization (Rozengart and Kazanskii, 1971).…”

Section: Introductionmentioning

confidence: 99%

Kinetics of n-Butylbenzene Dehydrocyclization over Chromia−Alumina

Laatikainen

Vahteristo

Saukkonen

et al. 1996

Ind. Eng. Chem. Res.

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The kinetics of dehydrogenation, cyclization, and isomerization steps in n-butylbenzene dehydrocyclization over precoked chromia−alumina has been investigated at 683−783 K. Apparent kinetic parameters of a pseudohomogeneous model were calculated from the initial-rate and integral-rate data measured with n-butylbenzene and 4-phenyl-1-butene in an isothermal fixed-bed reactor. Dehydrocyclization was shown to proceed by dehydrogenation of n-butylbenzene to n-butenylbenzenes, by their cyclization, and by dehydrogenation of the cyclic products to methylindenes and naphthalene. Direct cyclization of n-butylbenzene was of little importance over the precoked catalyst. According to the initial-rate data, dehydrogenation to n-butenylbenzenes followed an apparent order of 0.5 and the kinetic parameters seemed to be applicable also at higher conversions. The primary dehydrogenation products were 1-phenyl-1-butenes, and a surface model based on hydrogen abstraction from the α-carbon has been discussed. The initial cyclization rates measured with 4-phenyl-1-butene were appreciably lower than those observed in integral-rate experiments. The discrepancy was tentatively explained by the higher reactivity of 1-phenyl-1-butenes, which are the main constituents of the n-butenylbenzene fraction at longer contact times. High conversion runs with n-butylbenzene also showed that methylindenes and -indans were partly dealkylated and probably polymerized. The apparent orders ranged from 1 to 1.5 for 1,6-cyclization and from 0.5 to 0.8 for 1,5-cyclization. Skeletal isomerization of n-butylbenzene to sec-butyl- and sec-butenylbenzenes was rapidly subsided during coking, and on the coked catalyst at 783 K the reaction followed an apparent order of −0.5.

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Studies on the dehydrocyclisation ofn-octane and gasoline over chromia-alumina-potassium oxide catalyst

Hassan¹,

Abdou²,

Roushdi³

et al. 1981

J. Chem. Technol. Biotechnol.

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Catalytic C₆-Dehydrocyclisation of Aliphatic Hydrocarbons on Oxide Catalysts

Cited by 27 publications

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On possible processes of the formation of carbon nanomaterials with electrodischarge treatment of hydrocarbons

On possible processes of the formation of carbon nanomaterials with electrodischarge treatment of hydrocarbons

Kinetics of n-Butylbenzene Dehydrocyclization over Chromia−Alumina

Studies on the dehydrocyclisation ofn-octane and gasoline over chromia-alumina-potassium oxide catalyst

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Catalytic C6-Dehydrocyclisation of Aliphatic Hydrocarbons on Oxide Catalysts

Cited by 27 publications

References 0 publications

On possible processes of the formation of carbon nanomaterials with electrodischarge treatment of hydrocarbons

On possible processes of the formation of carbon nanomaterials with electrodischarge treatment of hydrocarbons

Kinetics of n-Butylbenzene Dehydrocyclization over Chromia−Alumina

Studies on the dehydrocyclisation ofn-octane and gasoline over chromia-alumina-potassium oxide catalyst

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Catalytic C₆-Dehydrocyclisation of Aliphatic Hydrocarbons on Oxide Catalysts