Organosulfur Constituents in Rasa Coal

White, Curt M.; Douglas, L.J.; Anderson, Robert; Schmidt, Charles E.; Gray, R.J.

doi:10.1021/bk-1990-0429.ch016

Cited by 13 publications

(29 citation statements)

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“…The both coals have been geochemically interpreted in the context of the past formation processes in estuarine and lagoonal environments subjected to recurrent marine transgressions. White et al (1990) pointed out that Raša coal had generated substantial interest over the decades due to its highly increased organic sulphur levels. Based on geological study (Hamrla, 1960), they quoted that the Raša coal-forming plants (few if any higher plants) lived in lacustrine and/or brackish environmental conditions, while their debris had been periodically inundated with seawater.…”

Section: Coal and Ash Geochemistrymentioning

confidence: 99%

“…In contrast to inorganic sulphur (such as pyrite) which can be isolated by physical methods, organic sulphur is the part of the coal structure, and cannot be removed by physical methods (Rađenović, 2004). White et al (1990) found out families of compounds in the Raša coal containing both N and S; S and O; and S, N and O; they emphasised that it was "rare to observe a homologous series of compounds from coal that contains three different heteroatoms". Figure 2 shows that the SHOS Se and U values are markedly increased compared to coal Clarke values, especially when previously published values (Limić and Valković, 1986) are taken into account.…”

Section: Coal and Ash Geochemistrymentioning

confidence: 99%

“…The authors concluded that Raša coal is not a typical coal, as the organic matter had not been derived from the higher terrestrial plants. White et al (1990) carried out the petrographic, proximate, and ultimate analyses of Raša coal, and they also reported information on the vitrinite reflectance, carbon aromaticity, sulphur and carbon isotopic abundances, ash analysis and forms of sulphur. They stated that "for the scientist interested in characterizing organic sulphur components in coal, Raša coal is a good starting point".…”

Section: Introductionmentioning

confidence: 99%

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Geochemistry of Croatian superhigh-organic-sulphur Raša coal, imported low-S coal and bottom ash: their Se and trace metal fingerprints in seawater, clover, foliage and mushroom specimens

Medunić

Kuharić

Krivohlavek

et al. 2018

IJOGCT

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Abstract:The Labin City area has represented the major Croatian coal mining, metal industry and coal-fired electricity centre for more than two centuries. The domestic superhigh-organic-sulphur (SHOS) Raša coal is a unique variety compared to other coal types worldwide, based on its highest organic sulphur values, up to 11%. It was utilised in the Plomin coal-fired power plant during the period 1970-2000, and was replaced by an imported low-S coal afterwards. This paper presents the levels of S, Se, V, U, Hg, Sr, Cd, Cr, Pb, Cu and Zn in the two coal types, their bottom ash, seawater and plant (clover, mushroom and foliage) specimens collected from the Labin City area, while the sulphate was measured in surface stream water. Their levels were compared with relevant legislative as well as the published data from different world localities. Data analysis was interpreted in the context of past and recent coal combustion activities.

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Section: Coal and Ash Geochemistrymentioning

confidence: 99%

Section: Coal and Ash Geochemistrymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Geochemistry of Croatian superhigh-organic-sulphur Raša coal, imported low-S coal and bottom ash: their Se and trace metal fingerprints in seawater, clover, foliage and mushroom specimens

Medunić

Kuharić

Krivohlavek

et al. 2018

IJOGCT

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“…Raša coal appears to have been formed in a high-pH marine environment where bacteria thrived. This hypothesis (White et al, 1990) is supported by the presence of substantial amounts of both calcite and dolomite in Raša coal. The calcium-and magnesium-rich environment where Raša coal formed is expected to have been alkaline.…”

Section: Sulphur In Raša Coalmentioning

confidence: 85%

Once Grand, Now Forgotten: What Do We Know About the Superhigh-Organic-Sulphur Raša Coal?

Medunić

Rađenović

Bajramović

et al. 2016

MGPB

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The Istrian coal mines, located in the eastern part of the Istrian Peninsula (Northern Adriatic Sea, Croatia) had by far the most important and economically the most valuable deposits of the anthracite coal reserves in Croatia since the 18th century until the year 1999, when their excavation and use in the coal-fired power plant Plomin ceased. The coal is found within the Palaeocene Kozina limestone beds. Four coal basins, Karojba, Sveti Martin, Pićan, and the Labin basin, hosted seven coal mines, e.g. Tupljak, Potpićan, Kozljak, Štrmac, Raša, Ripenda, and Krapan. The coal has been generally known under the name of Raša coal. It is exceptional in world terms due to its high content of organic sulphur, which can be up to 14%. Herewithin, this paper reviews Croatian scientific publications devoted to various aspects of Raša coal, along with the most important publications on either similar coals or relevant subjects worldwide. A brief introduction deals with the role of coal in electricity production, and the history of coal mining in Istria. The following chapter summarises current knowledge of the coal sulphur geochemistry, with several examples of high-sulphur coals from India and China. It is followed by the geological, geochemical, and physical characterisation of Raša coal. Since perturbations to ecosystems caused by coal combustion have been documented in numerous papers from a number of countries, Croatian studies carried out to determine the impact of Raša coal combustion on the local environment are also presented.

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“…Coal with an organic sulfur content of 4% to 11% is referred to as superhigh-organic-sulfur (SHOS) coals (Chou, 1997). The SHOS coals and their very high organic sulfur contents, are not common and have attracted the attention of researchers (Dai et al, 2008(Dai et al, , 2017(Dai et al, , 2018Li and Tang, 2014;Li et al, 2015;Meduni c et al, 2020;Smith and Batts, 1974;Torres-Ordonez et al, 1990;White et al, 1990;Zhao et al, 2014Zhao et al, , 2020. In some special cases the sulfur content in coal is high and the organic sulfur content exceeds 50% of total sulfur (Dai et al, 2008(Dai et al, , 2017(Dai et al, , 2018Tang, 2013, 2014;Li et al, 2015;Meduni c et al, 2016b;Sinninghe Damst e et al, 1999;Smith and Batts, 1974;Torres-Ordonez et al, 1990;White et al, 1990;Zhao et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

The evolution characteristics of organic sulfur structure in various Chinese high organic sulfur coals

Tang

Chen

et al. 2020

Energy Exploration & Exploitation

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Understanding the organic sulfur structure and its evolution characteristics is crucial to the desulfurization of coal, as they are the dominant factors determining the removal of organic sulfur from coal. To learn the organic sulfur structure characteristics, a series of high-organic-sulfur coals from China with different ranks were studied by coal petrology, structural chemistry, and organic geochemistry theory in this paper. Coal petrological analysis shows some of the high-organic-sulfur coals with high TPI values and low GI values indicating that they have experienced unusual conditions when the coal was forming. Through the FTIR analysis, the organic sulfur structural parameters shows the relative abundance of aliphatic sulfur (thiol, thioether and sulfone) in these coals decreased with the increasing coal rank and the relative abundance of aromatic sulfur in coal generally showed an increasing trend with increasing coalification, divided into three different evolutionary stages (0.37%–1.40%, 1.40%–1.99% and 1.99%–3.93% of Rm). Comprehensive analysis shows that EID and TPI had a significant correlation with the organic sulfur structural parameters, which means regardless of the coal rank the impact of the environment on the structure of organic sulfur is independent. These results give a new insight into organic sulfur characteristics in coal and its evolution characteristics with coal rank, which are potentially useful for the efficient remove the organic sulfur from coal.

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Organosulfur Constituents in Rasa Coal

Cited by 13 publications

References 0 publications

Geochemistry of Croatian superhigh-organic-sulphur Raša coal, imported low-S coal and bottom ash: their Se and trace metal fingerprints in seawater, clover, foliage and mushroom specimens

Geochemistry of Croatian superhigh-organic-sulphur Raša coal, imported low-S coal and bottom ash: their Se and trace metal fingerprints in seawater, clover, foliage and mushroom specimens

Once Grand, Now Forgotten: What Do We Know About the Superhigh-Organic-Sulphur Raša Coal?

The evolution characteristics of organic sulfur structure in various Chinese high organic sulfur coals

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