Raman high-pressure study of butane isomers up to 40 GPa

Kudryavtsev, D. A.; Kutcherov, Vladimir; Dubrovinsky, Leonid

doi:10.1063/1.5049481

Cited by 6 publications

(12 citation statements)

References 33 publications

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“…The possible formation of ultradispersive diamonds could also affect the spectra. The propane remained stable at 893 K. The spectra of untouched propane are in good correspondence with the previous experiments carried out by us 37 . The complex methane-hydrogen compounds reference peaks were obtained from 33 .…”

Section: Figuresupporting

confidence: 90%

“…The formation of ultradispersive diamonds could also affect the spectra. The propane remained stable at 940 K. The spectra of pristine propane are in good correspondence with the previous experiments that we carried out 37 . On the right side of the figure there is the magnified region of the C-H valence vibrations of the saturated and unsaturated hydrocarbons.…”

Section: Figuresupporting

confidence: 90%

“…The propane remained stable at temperatures of 840 K and lower. The spectra of untouched propane are in good correspondence with the previous experiments we carried out 37 .…”

Section: Scientific Reports |supporting

confidence: 88%

“…[2][3][4]12 , for unsaturated compounds the reference peaks were obtained from 31,32 , and for graphite (soot) modes, the reference peaks were obtained from 27,28 . The reference peaks for C-C stretching and C-C bending of hydrocarbons were obtained for ethane from 12 , the peaks for propane were obtained from 12,37 , the peaks for n-butane from 12,37 , the peaks for n-pentane from 39 , and the peaks for n-hexane were obtained from 38 . The propane remained stable at 930 K. The spectra of untouched propane are in good correspondence with the previous experiments we carried out 37 .…”

Section: Figurementioning

confidence: 99%

“…The reference peaks for C-C stretching and C-C bending of hydrocarbons were obtained for ethane from 12 , the peaks for propane were obtained from 12,37 , the peaks for n-butane from 12,37 , the peaks for n-pentane from 39 , and the peaks for n-hexane were obtained from 38 . The propane remained stable at 930 K. The spectra of untouched propane are in good correspondence with the previous experiments we carried out 37 . The hydrogen vibrational modes were investigated in those experiments 33 .…”

Section: Figurementioning

confidence: 99%

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Raman Spectroscopy Study on Chemical Transformations of Propane at High Temperatures and High Pressures

Kudryavtsev

Fedotenko

Koemets

et al. 2020

Sci Rep

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this study is devoted to the detailed in situ Raman spectroscopy investigation of propane c 3 H 8 in laserheated diamond anvil cells in the range of pressures from 3 to 22 GPa and temperatures from 900 to 3000 K. We show that propane, while being exposed to particular thermobaric conditions, could react, leading to the formation of hydrocarbons, both saturated and unsaturated as well as soot. Our results suggest that propane could be a precursor of heavy hydrocarbons and will produce more than just sooty material when subjected to extreme conditions. These results could clarify the issue of the presence of heavy hydrocarbons in the earth's upper mantle.Thermal and catalytic transformations of various hydrocarbon compounds at normal pressure have attracted significant attention in the field of petrochemistry. However, high-pressure chemistry of hydrocarbons as a science started to develop only recently, -primarily due to the unavailability of the specific equipment for the experiments. To date, only methane, the first member of the alkane homologous series, has been investigated when subjected to a wide range of pressures and temperatures 1-4 , because of its widespread occurrence in geological systems 5-7 and well-known role in the atmosphere of the Solar System's outer planets 8,9 . The behavior of other hydrocarbons, both unsaturated 10,11 and saturated 12,13 , have been less widely investigated with the use of various high-pressure techniques.The focus on the significance of methane's high-pressure high-temperature behavior implies that the fate of higher hydrocarbons has been ignored. Though the high-pressure, high-temperature (HPHT) behavior of ethane has been investigated several times 12,14 , propane has only been studied at ambient temperatures 15,16 . Propane is the third most abundant hydrocarbon on Earth after methane and ethane. It has been detected in the atmosphere of outer planets 17 and their satellites 18 , and is a typical product of HPHT hydrocarbon synthesis performed both for chemical and geological purposes 19,20 .The relevance of the investigation of carbon-bearing compounds can be understood from the perspective of the growing evidence of the role of hydrocarbon compounds deep in the Earth's interior, which could contribute to the global carbon cycle 21,22 . Unfortunately, even for methane, investigations into its behavior under conditions of high pressure have yielded inconclusive and mutually conflicting results.Propane's importance as a petrochemical feedstock led to detailed studies of its thermal transformations in the range of 500-900 °C in processes such as pyrolysis and thermal cracking [23][24][25] . By changing the basic conditions of the process, the content of hydrocarbon compounds complex systems could be varied from higher normal and isoalkanes, dienes, arenes, and alkenes to C 1 -C 3 fractions. These thermal processes were only investigated in the diapason under relatively mild pressures because of the process goal-low pressures are favorable for the synthesis of low-molecul...

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Section: Figuresupporting

confidence: 90%

Section: Figuresupporting

confidence: 90%

“…The propane remained stable at temperatures of 840 K and lower. The spectra of untouched propane are in good correspondence with the previous experiments we carried out 37 .…”

Section: Scientific Reports |supporting

confidence: 88%

Section: Figurementioning

confidence: 99%

Section: Figurementioning

confidence: 99%

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Raman Spectroscopy Study on Chemical Transformations of Propane at High Temperatures and High Pressures

Kudryavtsev

Fedotenko

Koemets

et al. 2020

Sci Rep

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High‐pressure‐induced phase transition and amorphization of xylitol by Raman spectroscopy

Zhang

Fang

et al. 2022

J Raman Spectroscopy

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Creating high‐pressure environments is an indispensable method to explore structural change, stability, and the upper limits for the application of xylitol under extreme conditions. Herein, we report a detailed description of the vibrations and phase transition of xylitol under high pressures by Raman spectroscopy. We found a novel phase transition of xylitol under 8.07 GPa by changing the O–H and CH2 vibrations. As the pressure further increased, xylitol underwent an amorphous transformation at 16.94 GPa. This study opens a new research perspective for polyols and expands the application of xylitol under extreme conditions.

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WITHDRAWN: Abiotic carbonaceous matter as a hidden deep carbon reservoir in the serpentinized forearc mantle wedge

Tao,

Daniel,

Andreani

et al. 2024

Geochimica et Cosmochimica Acta

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Raman high-pressure study of butane isomers up to 40 GPa

Cited by 6 publications

References 33 publications

Raman Spectroscopy Study on Chemical Transformations of Propane at High Temperatures and High Pressures

Raman Spectroscopy Study on Chemical Transformations of Propane at High Temperatures and High Pressures

High‐pressure‐induced phase transition and amorphization of xylitol by Raman spectroscopy

WITHDRAWN: Abiotic carbonaceous matter as a hidden deep carbon reservoir in the serpentinized forearc mantle wedge

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