Kinetics and Mechanism of the Thermal Decomposition of n-Heptane<sup>1</sup>

Appleby, W. G.; Avery, W. H.; Meerbott, W. K.

doi:10.1021/ja01202a012

Cited by 48 publications

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“…Recently, Yuan et al [12] do an experimental and theoretical study of n-Heptane pyrolysis, they detected the pyrolysis products by using synchrotron vacuum ultraviolet photoionization mass spectrometry (SVUV-PIMS). Beside these, several studies on the pyrolysis of n-Heptane at atmospheric pressure have been published [6,13,14]. However, detailed theoretical studies about the pyrolysis of n-Heptane are not widely available in the literature.…”

Section: Introductionmentioning

confidence: 99%

Thermal rate constants of the pyrolysis of n-Heptane

Ding

Zhang

Han

2011

Combustion and Flame

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Section: Introductionmentioning

confidence: 99%

Thermal rate constants of the pyrolysis of n-Heptane

Ding

Zhang

Han

2011

Combustion and Flame

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“…Numerous studies have been published on the pyrolysis of n-paraffins such as ethane, propane, n-butane, n-heptane, n-decane, n-hexadecane etc. at atmospheric pressure [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16]. The main thrust in these studies has been to enhance the yield of low molecular weight olefins.…”

Section: Introductionmentioning

confidence: 99%

“…Appleby et al [8], Murata and Saito [9,11], Bajus et al [12], Aribike and Susu [6] and Pant and Kunzru [13] have investigated the kinetics and product distribution of atmospheric pressure pyrolysis of n-heptane. Aribike and Susu [7] developed a detailed mechanistic model of n-heptane pyrolysis, whereas Pant and Kunzru [13] developed a model based on a molecular reaction scheme.…”

Section: Introductionmentioning

confidence: 99%

“…Aribike and Susu [7] developed a detailed mechanistic model of n-heptane pyrolysis, whereas Pant and Kunzru [13] developed a model based on a molecular reaction scheme. All the authors, except Appleby et al [8], used excessive dilution (mole ratio of inert to n-heptane equal to or more than 10.0) with inert (either steam or N 2 ), and carried out reactions at high temperature, representative of industrial operations. However, very few studies have been reported on high pressure pyrolysis of nheptane.…”

Section: Introductionmentioning

confidence: 99%

“…However, very few studies have been reported on high pressure pyrolysis of nheptane. Appleby et al [8] carried out a few runs at high pressure (0.88 MPa). They observed that selectivities of ethane and propane increased with pressure, whereas the selectivity of ethylene decreased.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

High pressure pyrolysis of n-heptane

Chakraborty

Kunzru

2009

Journal of Analytical and Applied Pyrolysis

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High temperature pile irradiation of the n‐heptane‐hydrogen system

Miley

Martin

1961

AIChE Journal

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A pilot unit for the high-temperature irradiation of flowing reactants was designed for the beam port of a nuclear reactor. Radiation-thermal cracking of the n-heptane-hydrogen system was studied with molal HJG ratios from 0 to 5 a t 250 Ib./sq. in., 600' to 75OoF., 2 to 8 min. residence time, and up to 3,600 rep./min. Although conversions were law, the decomposition rate was significantly increased by radiation giving G values > 103. Product distributions were not significantly altered by radiation. These results, while different from low-temperature data, appear consistent with other published high-temperature results. Radiation yields were found to be reasonably linear with total dose from 0 to 14 krep., but a twofold increase was observed in passing from a molal HJC, ratio of 0 to 0.5.Although the radiation decomposition of organic compounds has been studied extensively, a majority of these studies have been concerned with room-temperature effects and have utilized cobalt-60 or machine radiation sources (1, 2 ) . The possibility of using a full scale nuclear reactor to produce process steam and simultaneously irradiate chemicaIs has led to experiments with reactor radiation and elevated temperatures ( 3 to 8 ) . Lucchesi e t al. (7) reported a study of the high temperature radio-cracking (radiation decomposition) of several organic systems with G values far larger than those reported for low-temperature irradiations. The present work was designed to extend these studies to the n-heptane-hydrogen system. APPARATUSIrradiations were carried out in the University of Michigan's Ford Nuclear Reactor, a 1-mw. swimming pool type (9, 10, 11). Two beam ports, designated G and J, were utilized. Experiments in J port used a fission plate (an encased uranium slab placed against the end of the port to increase the fast neutron flux).A flow-system pilot unit was designed to handle multistream, liquid-gas, chemical reactions at high temperature and pressure (Figure 1). External equipment such as the feed pumping and product separation section are fairly conventional and are described elsewhere ( 9 ) . The irradiation vessel involved unique problems (Figure 2 ) . The unusual shape is a result of space limitations imposed by the beam port. Reactants enter the lower section and flow under the horizontal baffle plate to the end of the vessel nearest the nuclear reactor core before exiting. A calrod heater was immersed in the lower half of the vessel, and the vessel and inlet lines were wrapped with heating tape and asbestos insulation. Thermocouples were located on George H. Miley is with the University of Illinois, Urbana, Illinois. Vol. 7 , No. 4the vessel shell, on inlet and outlet lines, and at 3-in. intervals in the thermowell. A cooling coil provided an additional means of temperature regulation. Type 304 stainless steel was used throughout. Because induced radioactivity made direct maintenance impossible after initial exposure, special precautions were taken to prevent plugging. A strainer was placed at the vessel outlet,...

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Kinetics and Mechanism of the Thermal Decomposition of n-Heptane¹

Cited by 48 publications

References 0 publications

Thermal rate constants of the pyrolysis of n-Heptane

Thermal rate constants of the pyrolysis of n-Heptane

High pressure pyrolysis of n-heptane

High temperature pile irradiation of the n‐heptane‐hydrogen system

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Kinetics and Mechanism of the Thermal Decomposition of n-Heptane1

Cited by 48 publications

References 0 publications

Thermal rate constants of the pyrolysis of n-Heptane

Thermal rate constants of the pyrolysis of n-Heptane

High pressure pyrolysis of n-heptane

High temperature pile irradiation of the n‐heptane‐hydrogen system

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Kinetics and Mechanism of the Thermal Decomposition of n-Heptane¹