Chemical structure of semifusinite and fusinite of steam and coking coal from the Upper Silesian Coal Basin (Poland) and its changes during heating as inferred from micro-FTIR analysis

Morga, R.

doi:10.1016/j.coal.2010.07.003

Cited by 49 publications

(22 citation statements)

References 24 publications

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“…Therefore, micro-FTIR is particularly suited for addressing the heterogeneity of coals and organic matter-bearing shales at high resolution. However, only a few studies have applied reflectance micro-FTIR to the qualitative or semi-quantitative characterization of coal [33][34][35][36][37][38]. To the best of our knowledge, no research has been reported about employing micro-FTIR for quantitative characterization of shales at a microscopic level [39][40][41].…”

Section: Introductionmentioning

confidence: 99%

Quantitative analysis of shales by KBr-FTIR and micro-FTIR

Chen

Furmann

Mastalerz

et al. 2014

Fuel

135

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Section: Introductionmentioning

confidence: 99%

Quantitative analysis of shales by KBr-FTIR and micro-FTIR

Chen

Furmann

Mastalerz

et al. 2014

Fuel

135

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“…The characteristic peaks near the wavenumbers 3550 to 3200, 2935 to 2915, 1605 to 1595 and 1460 to 1435 cm −1 in FTIR spectrum characterized the hydroxyl, aliphatic methylene, aromatic C═C and aliphatic methyl groups, respectively, of carboxylic acid or carboxylate in coal based on the peak area . After solvent extraction, the hydroxyl, methyl, methylene, and aromatic hydrocarbon content in coal was decreased, indicating that the coal was degraded after solvent action.…”

Section: Resultsmentioning

confidence: 99%

Controlling mechanism of coal chemical structure on biological gas production characteristics

et al. 2020

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Summary To find the effect of coal chemical structure on biogas production, Lignite B was collected and extracted with nitrogen methylpyrrolidone (NMP), acetone and 0.60 mol/L NaOH. Simultaneously, methanogenic bacteria were enriched, and gas production experiments involving solvent extraction from residual coal and secondary gas production experiments involving coal were performed. The characteristics of biogas production, microcrystalline structure and coal chemical structure were analyzed. The results showed that the biogas production capacity of residual coal extracted by different solvents differed. The biogas production capacity of residual coal extracted by 0.60 mol/L NaOH was severely inhibited. The biogas production capacity of residual coal extracted by NMP and acetone was enhanced compared with that of raw coal. In contrast, primary residual coal still exhibits potential for methane production, but the methane production efficiency was reduced. Changes in the microcrystalline structure and functional groups of residual coal showed that solvent extraction increases the spacing and stacking height of the aromatic lamellae of coal, reduces the hydroxyl, methyl, methylene and aromatic hydrocarbon levels in coal, loosens the macromolecular network structure of coal, and enhances the connectivity of pores and fissures, thus allowing methane‐producing bacteria to enter the coal mass and create favorable conditions for gas production through interactions between the two. X‐ray photoelectron spectroscopy measurements showed that the secondary gas production increased the C content on the coal surface, decreased the O content and the O/C ratio, thus promoting the consumption of oxygen‐containing functional groups on the coal surface to further produce gas.

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“…Micro-FTIR analyses of fusinite and semifusinite have demonstrated that fusinite -as compared to semifusinite obtained from the same coal -exhibits higher aromaticity and condensation of the structure (Morga, 2010(Morga, , 2010a(Morga, , 2011.…”

Section: Introductionmentioning

confidence: 99%

“…In recent years, however, the micro-FTIR analysis in which the infrared spectrometer is linked to an optical microscope, allowing for micro-area analyses, is more and more common in the petrographic components research (Chen et al, 2012(Chen et al, , 2013Guo & Bustin, 1998;1998a;Mastalerz & Bustin, 1995. The analyses of the Polish bituminous coal using the micro-FTIR method are carried out since recently (Hacura et al, 2003;Komorek, 2013Komorek, , 2013aMorga, 2010Morga, , 2010aMorga, , 2011. The FTIR method allows to determine the functional groups in individual petrographic components of coal and their derivatives (Guo & Bustin, 1998, 1998aGuo et al, 1996;Hacura et al, 2003;Iglesias et al, 1995;Komorek, 2013Komorek, , 2013aMastalerz & Bustin, 1995;, 1997Morga, 2010Morga, , 2010aMorga, , 2011.…”

Section: Introductionmentioning

confidence: 99%

“…The analyses of the Polish bituminous coal using the micro-FTIR method are carried out since recently (Hacura et al, 2003;Komorek, 2013Komorek, , 2013aMorga, 2010Morga, , 2010aMorga, , 2011. The FTIR method allows to determine the functional groups in individual petrographic components of coal and their derivatives (Guo & Bustin, 1998, 1998aGuo et al, 1996;Hacura et al, 2003;Iglesias et al, 1995;Komorek, 2013Komorek, , 2013aMastalerz & Bustin, 1995;, 1997Morga, 2010Morga, , 2010aMorga, , 2011.…”

Section: Introductionmentioning

confidence: 99%

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Internal Structure of Vitrinite and Sporinite in the View of Micro-FTIR Spectroscopy Using the Example of Coal from the Seam 405 of the Upper-Silesian Coal Basin (USCB)

Komorek

2016

Archives of Mining Sciences

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The aim of the study was to compare the internal structure of vitrinite and sporinite obtained from coal from the seam 405. The examinations were performed with the use of infrared spectroscopy in the micro-area (micro-FTIR).Studies have shown that vitrinite is characterized by lower content of aliphatic components and greater content of aromatic components than sporinite. Sporinite is characterized by longer and less branched aliphatic chains than vitrinite.It was found that vitrinite internal structure is characterized by a greater relative content of aromatic than aliphatic components. The degree of condensation of aromatic rings in structure of vitrinite increases, when the coal rank rises. Studies have shown that the transformation of the vitrinite internal structure towards a structure characterized by a greater degree condensation of aromatic components proceeds at the cost of restructuring the aliphatic groups and is related to the restructuring of the aromatic systems.The structure of sporinite is characterized by a greater participation of aliphatic bonds as compared to aromatic bonds. The relative content of the aliphatic components decreases together with increase of aromatic hydrogen functional group CH ar content in the internal structure of sporinite when the coal rank rises. The aliphatic bonds in the sporinite are subject to restructuring. The aliphatic chains are getting increasingly shorter.Keywords: vitrinite, sporinite, internal structure of vitrinite and sporinite, micro-FTIR Celem przeprowadzonych badań było porównanie struktury wewnętrznej witrynitu i sporynitu z węgla z pokładu 405 z GZW. Badania przeprowadzono metodą analizy spektralnej w podczerwieni w mikroobszarze (mikro-FTIR).Badania wykazały, że witrynit charakteryzuje się mniejszym udziałem składników alifatycznych i większym udziałem składników aromatycznych niż sporynit. Sporynit charakteryzuje dłuższymi słabiej rozgałęzionymi łańcuchami alifatycznymi niż witrynit. Stwierdzono, że struktura witrynitu charakteryzuje * INSTYTUT GEOLOGII STOSOWANEJ, POLITECHNIKA ŚLĄSKA, 44-100 GLIWICE, UL. AKADEMICKA 2, POLAND. E-mail: joanna.komorek@polsl.pl Unauthenticated Download Date | 5/11/18 12:19 PM 730 się większym względnym udziałem składników aromatycznych niż alifatycznych. Wraz ze wzrostem stopnia uwęglenia rośnie stopień kondensacji pierścieni aromatycznych w witrynicie. Badania wykazały, że przemiany struktury witrynitu w kierunku struktury charakteryzującej się większym stopniem kondensacji składników aromatycznych odbywają się kosztem przebudowy składników alifatycznych oraz związane są też z przebudową układów aromatycznych.Struktura sporynitu z charakteryzuje się większym udziałem wiązań alifatycznych niż aromatycznych. Wraz ze wzrostem stopnia uwęglenia w strukturze wewnętrznej sporynitu maleje udział wiązań alifatycznych przy jednoczesnym wzroście zawartości wiązań aromatycznych CH ar . Wiązania alifatyczne w sporynicie ulegają przebudowie. Łańcuchy wiązań alifatycznych stają się coraz krótsze.Słowa kluczowe: witrynit, sporynit...

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Chemical structure of semifusinite and fusinite of steam and coking coal from the Upper Silesian Coal Basin (Poland) and its changes during heating as inferred from micro-FTIR analysis

Cited by 49 publications

References 24 publications

Quantitative analysis of shales by KBr-FTIR and micro-FTIR

Quantitative analysis of shales by KBr-FTIR and micro-FTIR

Controlling mechanism of coal chemical structure on biological gas production characteristics

Internal Structure of Vitrinite and Sporinite in the View of Micro-FTIR Spectroscopy Using the Example of Coal from the Seam 405 of the Upper-Silesian Coal Basin (USCB)

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