Measurement of temperature rise times in pyrolysis gas chromatography

Levy, Ram L.; Fanter, Dale L.

doi:10.1021/ac60280a025

Cited by 23 publications

(11 citation statements)

References 7 publications

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“…A commercial generator employing less than 50 W has been reported to have: a temperature rise time of as much as 1.5 s to 770 OC. In contrast a 2.5 kW generator achieved a rise time of 0.12 s to the same temperature (Levy & Fanter 1969). Heat transfer to the sample also depends on the positioning of the Curiepoint wire within the work coil.…”

Section: B Pyrolysersmentioning

confidence: 99%

The Application of Pyrolysis Techniques to the Identification of Micro‐organisms

Gutteridge

Norris

1979

Journal of Applied Bacteriology

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Section: B Pyrolysersmentioning

confidence: 99%

The Application of Pyrolysis Techniques to the Identification of Micro‐organisms

Gutteridge

Norris

1979

Journal of Applied Bacteriology

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“…induction field of 1170 Oe seems to be ideal (1)(2)(3)(4)(5)(6)(7)(8)(9)(10)(11)(12)(13)(14)(15) ). We have shown earlier (6,7) that a fast and reproducible warm-up of samples in contact with cylindric ferromagnetic conductors can be obtained by high frequency induction heating.…”

Section: Tc [•C] Temperaturementioning

confidence: 99%

“…It was recorded using a low-mass thermocouple and an oscilloscope as described earlier (22). A low generator output obviously leads to small magnetic fields H and long rise-times (2,13). This, as well as unsuitable choice of conductor diameters and improper coupling of the coil to the oscillator, may have been the cause for some of the relatively long rise-times observed (2).…”

Section: Tc [•C] Temperaturementioning

confidence: 99%

“…A low generator output obviously leads to small magnetic fields H and long rise-times (2,13). This, as well as unsuitable choice of conductor diameters and improper coupling of the coil to the oscillator, may have been the cause for some of the relatively long rise-times observed (2). In contrast to certain claims (14) there are only small differences in the temperature rise-times between the surface and center of a conductor at frequencies around 500 KHz (24).…”

Section: Tc [•C] Temperaturementioning

confidence: 99%

“…There is by now general agreement that adequate long term and inter-laboratory reproducibility in thermal fragmentation can only be achieved by using a highly reproducible temperature-time profile for the fragmentation process (1)(2)(3)(4)(5). For nonvolatile or slightly volatile compounds the application of a square-wave temperature-time profile to the highly diluted sample …”

mentioning

confidence: 99%

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Curie Point Pyrolysis Gas Chromatography

Bühler¹,

Simon

1970

Journal of Chromatographic Science

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In Curie Point pyrolysis gas chromatography a ferromagnetic conductor in contact with the sample is heated inside a low volume glass capillary which is inserted into an rf coil with the carrier gas flowing through the capillary. The intrinsic properties of the conductor permit a self-control of the temperature to the Curie Point. The optimum wire diameter for a rapid warm-up is a function of the rf frequency. In order to have a fast temperature drop after cutting the rf field, small wire diameters are preferable. For such conductors relatively high frequencies are inherently necessary for a fast stabilization to the Curie Point. So far no differences in the self-controlled end-temperatures have been detected for wires of different origin.

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The importance of temperature rise time in pyrolysis kinetic studies

Rastogi¹,

Svrcek²,

Behie³

1988

Can J Chem Eng

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The measurement of the kinetics of fast chemical reactions, such as hydrocarbon pyrolysis, is often hampered by limitations of the experimental reactor. To overcome problems in getting to reaction temperature, a micro‐reactor system has been developed with temperature rise times (TRT) in the millisecond range. Data is presented for the dynamic response of a Curie Point pyrolyser along with a computer simulation of how the gas‐filled micro‐reactor would respond. The importance of temperature rise time is clearly demonstrated by the computer simulations of propane and naphtha pyrolysis in the temperature range of 600°C and 1100°C.

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Measurement of temperature rise times in pyrolysis gas chromatography

Cited by 23 publications

References 7 publications

The Application of Pyrolysis Techniques to the Identification of Micro‐organisms

The Application of Pyrolysis Techniques to the Identification of Micro‐organisms

Curie Point Pyrolysis Gas Chromatography

The importance of temperature rise time in pyrolysis kinetic studies

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