Kinetics of Deposit Formation from Hydrocarbons. Fuel Composition Studies

Taylor, William F.

doi:10.1021/i360032a008

Cited by 26 publications

(11 citation statements)

References 3 publications

(4 reference statements)

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“…Although we did not examine the autoxidation reactions under hydrogentransfer conditions, some useful information has been generated in the past. Russell [1955] studied the oxidation of tetralin and cumene and found that small quantities of tetralin added to cumene would markedly lower the rate of oxidation, even though neat tetralin oxidized 10 times as fast as cumene at the same temperature and initiation rate [Taylor, 1969]. Similar ii ' ' 47 effects have been observed in other oxidation studies [Alagy, 1961;Alagy et al, 1959].…”

Section: Pyrolysis Of Tetralin With and Without Reactive Compoundssupporting

confidence: 54%

“…Taylor [1969] found that under thermal oxidation conditions (250°F) tetralin reduced deposits by more than 80% in air-saturated blends, although the H-donor property was not recognized and understood in earlier work. In fact, tetralin was one of the most effective inhibitors studied by Taylor (1969), presumably because it posses four benzylic hydrogen atoms which inhibit cooxidation reactions involving hydrogen abstraction by peroxy radicals [ingold, 1967;Frankenfeld and Taylor, 1980]. In deoxygenated fuels, tetralin was only slightly inhibitory at relatively low temperatures.…”

Section: Pyrolysis Of Tetralin With and Without Reactive Compoundsmentioning

confidence: 99%

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Advanced thermally stable jet fuels. Technical progress report, November 1992--January 1993

Schobert¹,

Eser²,

Song³

et al. 1993

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Section: Pyrolysis Of Tetralin With and Without Reactive Compoundssupporting

confidence: 54%

Section: Pyrolysis Of Tetralin With and Without Reactive Compoundsmentioning

confidence: 99%

Advanced thermally stable jet fuels. Technical progress report, November 1992--January 1993

Schobert¹,

Eser²,

Song³

et al. 1993

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“…If the ageing reaction is endothermic, it is possible to propose a lower limit for the activation energy for ageing 25. Some information, however, does exist in the area of autoxidative polymerization, where Taylor and Wallace postulated the following overall reaction for the formation of foulant deposit26–28: …”

Section: Model Formulationmentioning

confidence: 99%

Impact of deposit ageing on thermal fouling: Lumped parameter model

et al. 2009

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The thermal and hydraulic performance of heat exchangers can be seriously impaired by the formation of fouling deposits on the heat transfer surfaces. The thermal effect of fouling can be complicated when the deposit is subject to ageing, represented here as a change in deposit thermal conductivity (but not thickness) over time. In this article, we revisit the ageing concept for crude oil fouling proposed by Nelson (Refiner Nat Gas Manufacturer. 1934;13:271-276, 292-298), using a numerical model incorporating first order kinetics to generate quantitative comparisons of different ageing rates. Results are reported for lumped parameter systems (which also simulate point measurement methods commonly used in laboratory testing) that demonstrate that ageing can have a substantial influence on the rate of heat transfer and hence on the surface temperature and rate of fouling. Rapid ageing (compared with the rate of deposition) does not pose problems, but slow ageing, or the use of constant heat fluxes in experiments, can lead to modified thermal fouling behavior. It is concluded that deposit ageing dynamics should be considered alongside deposition rate dynamics when interpreting experimental fouling data and when modeling fouling behavior in support of heat exchanger design or operation.

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“…For fuel stressed at 430 K, as in the T = 380 K case, the absorption appears to be dominated by molecular absorption. These indicated changes in the fuel's molecular components are not surprising since other studies have shown that fuel deposition on heated surfaces is influenced by the system's chemistry Wallace, 1967, 1968;Taylor, 1969Taylor, , 1974Taylor, , 1976. This shift is indicative of changes in the molecular absorbers for the system.…”

Section: 8mentioning

confidence: 66%

Optical diagnostic methods for the study of fuel fouling

Parker¹,

Foutter²,

Rawlins³

1992

Ind. Eng. Chem. Res.

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2243the amount of the imbibed cornpitions and increased the intrinsic reactivity. However, the reactivity decreased abruptly in a high concentration of NaCl salts due to the limitation of the rate of ion exchange and the decrease of the degree of hydration of the active catalyst site.An experimental study of fuel fouling using optical measurement methods was performed. These measurements included absorption from 350 to 750 nm, scattering at 514.5 nm, and fluorescence using a probe wavelength of 514.5 nm. Measurements were performed using a constant-temperature heating system which exited into an optical cell. Each of the measurements proved useful in monitoring changes in the test fuel, JP-4, at test temperatures up to 775 K and pressures of 400 psig. Absorption measurements demonstrated both molecular changes in the fuel composition and a marked increase in the particulate present in the flow as a result of thermal stress. Scattering measurements indicated room temperature fuel to contain particulate with average diameters greater than 0.1 pm while thermally stressed fuel contained much larger concentrations of particulate with sizes below 0.06 pm. This work clearly illustrates the possibilities of using optical methods for monitoring the fuel fouling process.

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Kinetics of Deposit Formation from Hydrocarbons. Fuel Composition Studies

Cited by 26 publications

References 3 publications

Advanced thermally stable jet fuels. Technical progress report, November 1992--January 1993

Advanced thermally stable jet fuels. Technical progress report, November 1992--January 1993

Impact of deposit ageing on thermal fouling: Lumped parameter model

Optical diagnostic methods for the study of fuel fouling

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