Pyrolysis kerogen

Burnham A. K., Braun R. L., Gregg H. R., and Samoun A. M. (1987) Comparison of methods for measuring kerogen pyrolysis rates and fitting kinetic parameters. Energy Fuels... 

Seifert W. K. (1978) Steranes and terpanes in kerogen pyrolysis for correlation of oils and source rocks. Geochim. Cosmo-chim. Acta 42, 473 -484. 

The rate of gas evolution was monitored by a pressure transducer in the collection bottle. The rate of gas evolution peaked sharply during the kerogen pyrolysis at about 460°C. To minimize differences in residence times caused by the... 

Another comparison can be made with the Mossbauer spectroscopy results of Williamson et al. (8). For "TOSCO-II shale" with a grade of 40 gal/ton, they report that about 75% of the pyrite is converted to pyrrhotite during Fischer assay. Considering that some of this sulfur may be incorporated into the oil and that some H2S is produced by kerogen pyrolysis, this result agrees with the results shown in Figure 12. 

A frequent characteristic of past investigations is excessive complexity of the proposed kerogen pyrolysis models. The works of Fausett et al. (6 ) and Johnson et al. (3) belong in this category. A goal of the present investigation is to keep the model as simple as possible. 

As part of this investigation, kerogen pyrolysis models different from the one proposed here were considered. One such model of theoretical appeal is similar in structure to the one given in Figure 9 but with a pure diffusion process for the heavy oil production. However, this alternative model is incompatible with some experimental findings It predicts lower coke concentrations on the surface of the particle than in the interior, whereas microprobe results indicate a uniform coke distribution. Further, this diffusion model predicts zero coke yield for infinitely small particles, whereas the limited amount of data available for small particle sizes suggest a leveling-off of the coke yield below a particle size of 0.4 mm. 

Ishiwatari M., Ishiwatari R., Sakashita H., Tatsumi T. and Tominaga H. (1991) Pyrolysis of chlorophyll a after preliminary heating at a moderate temperature implications for the origin of prist-1-ene on kerogen pyrolysis. J.Anal. Appl. Pyrol. 18, 207 -218. 

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