The Chemical Action of Gaseous Ions Produced by Alpha Particles. Ix. Saturated Hydrocarbons

Lind, S. C.; Bardwell, D. C.

doi:10.1021/ja01420a012

Cited by 59 publications

(23 citation statements)

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“…The potential role played by uranium in petroleum generation, mainly through α-particle bombardment of organic matter, was recognised nearly a century ago (Lind and Bardwell, 1926).…”

Section: Introductionmentioning

confidence: 99%

On the changing petroleum generation properties of Alum Shale over geological time caused by uranium irradiation

Yang

Schulz

Horsfield

et al. 2018

Geochimica et Cosmochimica Acta

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An interdisciplinary study was carried out to unravel organic-inorganic interactions caused by the radiogenic decay of uranium in the immature organic-rich Alum Shale (Middle Cambrian-Lower Ordovician). Based on pyrolysis experiments, uranium content is positively correlated with the gas-oil ratios and the aromaticities of both the free hydrocarbons residing in the rock and the pyrolysis products from its kerogen, indicating that irradiation has had a strong influence on organic matter composition overall and hence on petroleum potential. The Fourier Transform Ion Cyclotron Resonance mass spectrometry data reveal that macro-molecules in the uranium-rich Alum Shale samples are less alkylated than less irradiated counterparts, providing further evidence for structural alteration by αparticle bombardment. In addition, oxygen containing-compounds are enriched in the uranium-rich samples but are not easily degradable into low-molecular-weight products due to irradiation-induced crosslinking. Irradiation has induced changes in organic matter composition throughout the shale's entire ca. 500 Ma history, irrespective of thermal history. This factor has to be taken into account when reconstructing petroleum generation history. The Alum Shale's kerogen underwent catagenesis in the main petroleum kitchen area 420 to 340 Ma bp. Our calculations suggest the kerogen was much more aliphatic and oil-prone after deposition than that after extensive exposure to radiation. In addition, the gas sorption capacity of the organic matter in the Alum Shale can be assumed to have been less developed during Palaeozoic times, in contrast to results gained by sorption experiments performed at the present day, for the same reason. The kerogen reconstruction method developed here precludes overestimations of gas generation and gas retention in the Alum Shale by taking irradiation exposure into account and can thus significantly mitigate charge risk when applied in the explorations for both conventional and unconventional hydrocarbons.

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“…The potential role played by uranium in petroleum generation, mainly through α-particle bombardment of organic matter, was recognised nearly a century ago (Lind and Bardwell, 1926).…”

Section: Introductionmentioning

confidence: 99%

On the changing petroleum generation properties of Alum Shale over geological time caused by uranium irradiation

Yang

Schulz

Horsfield

et al. 2018

Geochimica et Cosmochimica Acta

View full text Add to dashboard Cite

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“…The iodine atoms must eventually combine and react according to (1). Here it is important that there be no reaction between the atoms and the solvent, which would set up a chain and extend the reaction beyond that of radical detection.…”

Section: Discussionmentioning

confidence: 99%

Radiation-Induced Reaction between Iodine and Heptane

Forsyth

Weber

Schüler

1954

The Journal of Chemical Physics

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The radiation-induced reaction between iodine and n-heptane has been studied with a view to its use in the q.uantita.tive determination of free radical production in the radiolysis of liquid hydrocarbons. The yield of this reactIOn has been found to be nearly independent of iodine concentration and of temperature of the sample. The reaction is inhibited by the presence of dissolved oxygen. For each mole of hydrogen produced 0.6 mole of iodine is absorbed which indicates that free radical production is a major component of th~ over-all process. The primary decomposition yield is of the order of 10 bonds broken per 100 ev of absorbed energy.

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“…Apparatus and Technique.-The apparatus and technique used in these experiments have been previously described. 2 Decomposition of Malonic Acid in Glycerol.-At the beginning of each experiment 100 ml. of glycerol was placed in the dry reaction flask in the thermostated oil-bath.…”

Section: Methodsmentioning

confidence: 99%