Sulphur characterization in coal from X-ray absorption near edge spectroscopy

Kasrai, M.; Brown, James R.; Bancroft, G.M.; Yin, Zhanfeng; Tan, K. H.

doi:10.1016/s0166-5162(96)00033-x

Cited by 87 publications

(49 citation statements)

References 32 publications

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“…The shortcoming of sulfur K-edge NEXAFS spectroscopy, however, is its inability to discriminate precisely between soil organic sulfur forms with an oxidation state of 0 to +1 (polysulfides, disulfides, thiols, monosulfides, and thiophenes). Sulfur L-edge NEXAFS spectroscopy could provide complementary information to identify these sulfur moieties (Kasrai et al, 1996), but this technique only works well for samples that have large amounts of sulfur such as in coal (M. Kasrai, personal communication), and our attempt to resolve the organic sulfur species in humic substance extracts using S L-edge NEXAFS spectroscopy did not provide satisfactory results (D. Solomon, unpublished data 2005). While NEXAFS studies of organic phosphorus are rare (Toor et al, 2005;Sato et al, 2005), Beauchemin et al (2003) and Lombi et al (2006) demonstrated that P K-edge spectroscopy has great potential to investigate inorganic phosphorus species in long-term-fertilized, P-rich soils differing in pH, clay, and organic matter.…”

Section: Relationship With Other Methodsmentioning

confidence: 99%

Synchrotron‐Based Near‐Edge X‐Ray Spectroscopy of Natural Organic Matter in Soils and Sediments

Lehmann

Solomon

Brandes

et al. 2009

Biophysico‐Chemical Processes Involving Natural Nonliving Organic Matter in Environmental Systems

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SyNCHROTRON-BASED NEAR-EDgE X-RAy SPECTROSCOPy discrete radii indexed by a principal quantum number n = 1,2,3 …, and discrete binding energies for single-electron atoms of E n = −E 0 Z 2 /n 2 , where Z is the atomic number and E 0 = 13.6 eV (see Figure 17.1). When the energy of incident photons is increased to match the binding energy of an electron, the photon absorption probability suddenly increases in what is called an X-ray absorption edge (step function in Figure 17.2, which is at about 290 eV for carbon), so that the electron is completely removed from the atom in an ionization event (absorption edges are also labeled figure 17.1. Atom in the Bohr model. The electrons surround the nucleus. An incoming photon can lift an electron to a not fully occupied, higher orbital or remove it entirely from the atom. Energy (eV)280 285 290 295 300 Normalized absorption Measured ModeledStep functionfigure 17.2. Carbon NEXAFS spectrum of NOM from the Suwannee River (IHSS standard humic acid mounted on indium foil; total electron yield using a dwell time of 200 msec and an exit slit of 50 µm, calibrated to CO at 287.38 eV, Canadian Light Source SgM beamline 11-ID.1) to show pre-edge features and the so-called "edge". The spectrum is deconvoluted using a series of gaussian curves (g) at energy positions of known transitions, along with a step function at the edge as described by .

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Section: Relationship With Other Methodsmentioning

confidence: 99%

Synchrotron‐Based Near‐Edge X‐Ray Spectroscopy of Natural Organic Matter in Soils and Sediments

Lehmann

Solomon

Brandes

et al. 2009

Biophysico‐Chemical Processes Involving Natural Nonliving Organic Matter in Environmental Systems

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“…The sulphur-containing aromatic compounds (benzothiophene, dibenzothiophene and benzonaphthothiophene) were found in bituminous coal and anthracite, but not in lignite (Kasrai et al, 1996). Thus, the abundance of various types of organic sulphur compounds in coal may be related to its rank.…”

Section: Coal and Ash Geochemistrymentioning

confidence: 99%

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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“…The sulphur content and forms vary considerably with location and coal rank. Sulphur in coal appears in both organic (sulphur bonded to the hydrocarbon matrix) and in inorganic (metal sulphides, disulfides and sulphates) forms, and in the form of elemental sulphur (Kasrai et al, 1996). Elemental sulphur is not present in pristine coal, but is derived primarily from the oxidation of pyrite.…”

Section: Sulphur In Coalmentioning

confidence: 99%

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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Sulphur characterization in coal from X-ray absorption near edge spectroscopy

Cited by 87 publications

References 32 publications

Synchrotron‐Based Near‐Edge X‐Ray Spectroscopy of Natural Organic Matter in Soils and Sediments

Synchrotron‐Based Near‐Edge X‐Ray Spectroscopy of Natural Organic Matter in Soils and Sediments

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?

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