Studies of the thermal degradation of polythiophenes by pyrolysis-gas chromatography

Selsbo, Pernille; Ericsson, Ingvar

doi:10.1016/0141-3910(95)00200-6

Cited by 15 publications

(3 citation statements)

References 19 publications

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“…The maxima of H 2 S (Figure a) in this temperature region were therefore attributed to the hydrogenation of diaryl sulfides and complex thiophenes, respectively. The degradation of both is known to involve the formation of aromatics …”

Section: Resultsmentioning

confidence: 99%

Sulfur Analysis of Bolu-Mengen Lignite before and after Microbiological Treatment Using Reductive Pyrolysis and Gas Chromatography/Mass Spectrometry

Mullens¹,

Yperman²,

Carleer³

et al. 2005

Energy Fuels

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Atmospheric pressure-temperature programmed reduction coupled with on-line mass spectrometry (AP-TPR/MS) is used for the first time on microbiologically treated coal samples as a technique to monitor the degree of desulfurization of the various sulfur functionalities. The experimental procedure enables the identification of both organic and inorganic sulfur species present in the coal matrix. A better insight in the degradation of the coal matrix and the accompanying processes during the AP-TPR experiment is obtained by a quantitative differentiation of the sulfur. The determination of the sulfur balance for the reductive pyrolysis gives an overview of the side reactions and their relative contribution in the total process. The volatile sulfur species are unambiguously identified using AP-TPR off-line coupled with gas chromatography/mass spectrometry (GC/MS). In this way, fundamental mechanisms and reactions that occur during the reductive pyrolysis could be quantified, explaining the differences in AP-TPR recoveries. Therefore, this study gives a clearer view on the possibilities and limitations of AP-TPR as a technique to monitor sulfur functionalities in coal.

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Section: Resultsmentioning

confidence: 99%

Sulfur Analysis of Bolu-Mengen Lignite before and after Microbiological Treatment Using Reductive Pyrolysis and Gas Chromatography/Mass Spectrometry

Mullens¹,

Yperman²,

Carleer³

et al. 2005

Energy Fuels

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“…Although several studies on thermal degradation of polythiophene appeared in the literature [5][6][7][8][9], there are only few studies on thermal stability of PMTh [2,10]. The thermal stability of PMTh films electrochemically doped with SnCl 5 À and SbCl 6 À anions was studied by thermogravimetric analysis, TGA.…”

Section: Introductionmentioning

confidence: 99%

Pyrolysis mass spectrometry analyses of poly(3-methylthiophene)

Gozet

Hacaloğlu

2005

Journal of Analytical and Applied Pyrolysis

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“…Sulfur compounds are usually pyrolyzed with the formation of H 2 S and thiophene derivatives or other thermostable heterocyclic compounds. On the other hand, further decomposition of thiophenes into H 2 S and hydrocarbons can take place at higher temperatures …”

Section: Introductionmentioning

confidence: 99%

Secondary Pyrolysis of the Products of the Thermal Destruction of High-Sulfur Oil Shale

1997

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Secondary pyrolysis of products of Israeli oil shale processing was studied in a two-stage bench-scale unit. The gas and oil vapors generated from the primary pyrolysis were sent to the converter for the secondary pyrolysis at temperatures of 650−820 °C. The oil yield on kerogen decreased from 35.3% at the pyrolysis temperature of 500 °C to 15.4% at 820 °C. The gas yield increased in the same temperature range from 10.7 to 25.5%. The yields of hydrogen, methane, ethylene, and carbon monoxide increased with temperature, whereas yields of alkanes decreased. The secondary pyrolysis enables us to simplify substantially the composition of the primary shale oil. The higher the severity of the conversion, the higher the yield of the simplest homologuesthiophene, naphthalene, phenanthrene, anthracene, thionaphthene, and dibenzothiopheneand the lower the yield of alkyl derivativestoluene, methylthiophenes, styrene, etc. Maximal content of methyl and dimethyl derivatives was observed at a temperature of 730 °C. The total thiophenes yield may be as high as 6.4% on oil shale organic matter, and this can be of practical interest because thiophenes are an important source for the production of light- and photoemitting polymers, materials for semiconductors, electrochemical cells, films, sensors, and other high-tech devices.

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Studies of the thermal degradation of polythiophenes by pyrolysis-gas chromatography

Cited by 15 publications

References 19 publications

Sulfur Analysis of Bolu-Mengen Lignite before and after Microbiological Treatment Using Reductive Pyrolysis and Gas Chromatography/Mass Spectrometry

Sulfur Analysis of Bolu-Mengen Lignite before and after Microbiological Treatment Using Reductive Pyrolysis and Gas Chromatography/Mass Spectrometry

Pyrolysis mass spectrometry analyses of poly(3-methylthiophene)

Secondary Pyrolysis of the Products of the Thermal Destruction of High-Sulfur Oil Shale

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