Catalytic Cracking of Pure Hydrocarbons

Haensel, Vladimir

doi:10.1016/s0360-0564(08)60107-8

Cited by 23 publications

(13 citation statements)

References 18 publications

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“…It can be noticed that for interactions SLy230a and SLy230b the mean free path exhibits a slow variation with density. This behavior is similar to the one obtained by Haensel and Jerzak [5] who find mean free paths λ= 2, 1.5 and 1km for densities 0.2, 0.36 and 0.6 fm −3 respectively, for k i c = T = 5MeV. In contrast the results obtained with interactions SIII and SkM * show a substantially different behavior, both exhibiting a rapid monotonic decrease with density.…”

Section: Resultssupporting

confidence: 89%

“…It is worthwhile noticing that the effect of increasing momentum and/or temperature is similar and mostly consists of an overall reduction of the scale. Scaling properties were already discussed by Haensel and Jerzak [5]. As a result of their approximation scheme these authors found that scaling the neutrino energy and the temperature by a factor α produces a scaling of the mean free path by a factor 1/α 3 .…”

Section: Momentum and Temperature Dependencementioning

confidence: 71%

“…Various answers to this question are found in the literature. Indeed while Iwamoto and Pethick [1] conclude that Fermi liquid effects increase the mean free path to some extent, Haensel and Jerzak [5] find that near normal density, the overall effect of the nucleon -nucleon interaction on the mean free path is rather weak. In contrast, the recent paper by Reddy et.…”

Section: E Effect Of Residual Interactionsmentioning

confidence: 99%

“…where V (S) (q) is the interaction in momentum space in spin channel S. The case of non-degenerate neutrinos was examined by Haensel and Jerzak [5], who computed both the scattering and the absorption rates within the framework of Landau theory. They used a quasiparticle interaction derived from the Reid soft core nucleon-nucleon potential.…”

Section: Introductionmentioning

confidence: 99%

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Neutrino propagation and spin zero sound in hot neutron matter with Skyrme interactions

1999

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We present microscopic calculations of neutrino propagation in hot neutron matter above nuclear density within the framework of the Random Phase Approximation. Calculations are performed for non-degenerate neutrinos using various Skyrme effective interactions. We find that for densities just above nuclear density, spin zero sound is present at zero temperature for all Skyrme forces considered. However it disappears rapidly with increasing temperature due to a strong Landau damping. As a result the mean-free path is given, to a good approximation, by the mean field value. Because of the renormalization of the bare mass in the mean field, the medium is more transparent as compared to the free case. We find, in contrast, that at several times nuclear density, a new type of behavior sets in due to the vicinity of a magnetic instability. It produces a strong reduction of the mean free path. The corresponding transition density however occurs in a region where inputs from more realistic calculations are necessary for the construction of a reliable Skyrme type parametrization.

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Section: Resultssupporting

confidence: 89%

Section: Momentum and Temperature Dependencementioning

confidence: 71%

Section: E Effect Of Residual Interactionsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Neutrino propagation and spin zero sound in hot neutron matter with Skyrme interactions

1999

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“…The detector responds also to alkyl substituted aromatic hydrocarbons, with the response increasing with the size of alkyl substituent. This observation is expected in view of the work by Haensel [10]. Benzene gives an erratic response, since at elevated temperatures (and in contact with stainless steels) the preferred reaction is the formation of biphenyl [18,19].…”

Section: Preliminary Resultsmentioning

confidence: 95%

Catalytic cracking as the basis for a potential detector for gas chromatography

Bruno¹

1987

J. RES. NATL. BUR. STAN.

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This short paper describes the design, construction and preliminary experimental results obtained with a potential new detector for the gas chromatographic analysis of hydrocarbon species. The functional principle of the detector is the measurement of the temperature change of a catalyst as catalytic cracking occurs on its surface. The catalyst is a silicon dioxide-aluminum oxide-zeolite mixture similar to the materials used commercially in industrial riser crackers. The temperature drop which occurs at the onset of cracking is measured using two opposed thermocouple junctions. The first prototype, described in this paper, consists of a single pair of junctions. After appropriate signal conditioning (using a commercially available filter-amplifier), the thermocouple output is logged using an electronic integrator. Work on multi-junction cells, which is currently in progress, is also described briefly.

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Hydrocarbons from Petroleum and Natural Gas

2017

Hydrocarbon Chemistry, Two Volume Set

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Catalytic Cracking of Pure Hydrocarbons

Cited by 23 publications

References 18 publications

Neutrino propagation and spin zero sound in hot neutron matter with Skyrme interactions

Neutrino propagation and spin zero sound in hot neutron matter with Skyrme interactions

Catalytic cracking as the basis for a potential detector for gas chromatography

Hydrocarbons from Petroleum and Natural Gas

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