โ Scribed by Alan K. Burnham; James A. Happe
No coin nor oath required. For personal study only.
Aromaticities determined by 13C n.m.r. are reported for five shale oil samples (Green River formation) prepared underwidelydifferent pyrolysis conditions, In the absence of high-pressure hydrogen, the total amount of aromatic carbon in the products is nearly twice that in the raw shale. This is true for a wide range of pyrolysis conditions, although the distribution of aromatic carbon between the oil and carbonaceous residue changes. High-pressure hydrogen appears to inhibit both the formation of additional aromatic carbon during pyrolysis and the coking of aromatic oil. An improved kerogen decomposition mechanism is reported that accounts for these effects and provides for changes in the aromaticity of the liquid product with pyrolysis conditions. Further work is necessary to make it quantitative and account for gas formation.
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