Application of hot stage micro-FT-i.r. to the study of organic functional group changes during pyrolysis

Taulbee, Darrell N.; Sparks, Jennifer; Robl, Thomas L.

doi:10.1016/0016-2361(94)90078-7

Cited by 20 publications

(11 citation statements)

References 7 publications

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“…One expects evaporative losses, not gains. This phenomenon has been observed previously and ascribed to movement of alkanes from the interior of the kerogen particles to the surface where they become visible to the IR instrument. , This is a reasonable explanation.…”

Section: Discussionsupporting

confidence: 80%

“…We have found only two other published observations of anhydride formation in kerogens. Low-temperature thermal formation of anhydrides in Zap North Dakota lignite and in Nagoorin kerogen was observed using hot stage FTIR microscopy . Anhydrides were also reported in a paper that used IR emission from kerogens during oxidation to follow the oxidation …”

Section: Introductionmentioning

confidence: 75%

“…We cannot claim thermal anhydride formation in this case or others (for example, ref ) where there are shoulders in the IR carbonyl that might indicate anhydride formation because the published spectra in the figures are too small to interpret reliably. There is enough evidence to conclude that anhydrides are formed from many kerogens on heating to low temperatures. − …”

Section: Introductionmentioning

confidence: 99%

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Kerogen Chemistry 4. Thermal Decarboxylation of Kerogens

2005

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Infrared spectra confirm that, when heated to 200 °C, Bakken kerogens form anhydrides from carboxylic acids. The anhydrides in turn thermally decompose at temperatures below 250 °C. The thermal production of CO, the absence of CO2, and the low temperature of the anhydride decomposition are all consistent with a radical chain mechanism initiated by a kerogen radical. Anhydride decomposition occurs by addition of a radical to the anhydride carbonyl to form an ester and to liberate an acyl radical that rapidly loses CO to form an alkyl radical to continue the chain. This pathway is one of several by which kerogens thermally decarboxylate.

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Section: Discussionsupporting

confidence: 80%

Section: Introductionmentioning

confidence: 75%

Section: Introductionmentioning

confidence: 99%

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Kerogen Chemistry 4. Thermal Decarboxylation of Kerogens

2005

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“…Taulbee et a1 . 17 reported on experiments designed to assess organic functional group changes in demineralized kerogens and 1 ignite in situ during pyrolysis. These experiments were performed by coupling an optical microscope heating stage with a reflectance FTIR.…”

Section: Infrared Spectroscopymentioning

confidence: 99%

A characterization and evaluation of coal liquefaction process streams. Status assessment

Brandes¹

1995

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“…Other pyrolysis techniques can monitor or visualize in-situ kerogen transformation. Such methods are laser micropyrolysis of macerals [9][10], microscopy for visualization of coals [11][12][13][14] and FT-IR spectroscopy of kerogen [15].…”

Section: Introductionmentioning

confidence: 99%

Investigation of Kerogen Transformation During Pyrolysis by Applying a Diamond Anvil Cell

Budinova¹,

Huang²,

Racheva³

et al. 2014

Oil Shale

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Pyrolysis of Bulgarian oil shale was studied by using a diamond anvil cell, which allows one to observe directly the conversion of organic matter to mobile oily liquid, solid residue and gas. This method gives the possibility to detect very precisely the temperatures of kerogen transformation during pyrolysis. It was observed that most of the gaseous products were generated later than oily liquids, most probably by cracking processes of liquid products. Due to the strong connection between mineral and organic matter, the generation of liquids and gases from oil shale occurred at higher temperature. Light intensity measurements were used to follow quantitatively the rate of reaction.

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Application of hot stage micro-FT-i.r. to the study of organic functional group changes during pyrolysis

Cited by 20 publications

References 7 publications

Kerogen Chemistry 4. Thermal Decarboxylation of Kerogens

Kerogen Chemistry 4. Thermal Decarboxylation of Kerogens

A characterization and evaluation of coal liquefaction process streams. Status assessment

Investigation of Kerogen Transformation During Pyrolysis by Applying a Diamond Anvil Cell

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