Geochemical characteristics of elements in coal seams 4<sub>1</sub> and 4<sub>2</sub> of Heshan Coalfield, South China

Zhao, Qiaojing; Yong-jie, Niu; Xie, Zhipeng; Zhang, Kuangming; Zhou, Jinming; Арбузов, Сергей Иванович

doi:10.1177/0144598719886188

Cited by 12 publications

(6 citation statements)

References 56 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Such affinity of Si is widely reported from various coals around the World (i.e. Beaton et al, 1991;Crowley et al, 1997;Warwick et al, 1997;Spears, Zheng, 1999;Liu et al, 2001;Zhao et al, 2017Zhao et al, , 2020Finkelman et al, 2019;Životić et al, 2019). Furthermore, Querol et al (1997aQuerol et al ( , b, 2001a, Ward et al (1999), Karayigit et al (2000aKarayigit et al ( , 2020 and Alastuey et al (2001) accept a priori the exclusive relationship of Si with the clay minerals and use the correlation of the element with the alumino-silicate part of the ash to determine its mode of occurrence.…”

Section: Resultsmentioning

confidence: 95%

Silicon and aluminum in Bulgarian coals

Zdravkov¹

2021

Rev. Bulg. Geol. Soc.

View full text Add to dashboard Cite

The presence and distribution of Si and Al in 19 Bulgarian coal basins and deposits, belonging to 8 coal provinces, were studied. Coals are of different rank (lignite to anthracite) and age (Late Carboniferous to Pliocene). The presence of both studied major elements depends strongly on: i) their concentration within the basin’s provenance; ii) the extent of terrigenous supply; iii) environmental acidity during peat formation; and iv) the presence and composition of epigenetic mineralization within the coal seams. Because of the presumed abundant terrigenous supply, the concentrations of both Si and Al are higher than the world average for most of the studied coals. Exceptions are the Maritsa-West, Burgas, Staniantsi, Oranovo, Chukurovo and Pernik Basins, for which reduced terrigenous supply can be suggested. For most of the basins, both Si and Al demonstrate good positive correlation with the ash yields, thus arguing for predominant inorganic affinity. Relatively low Si/Al ratios (typically <2) and good positive correlation between Si and Al (ro>0.6) imply the predominant role of the clay mineral assemblages as the main source of the elements in coal. Quartz is presumed to have dominant role only in Maritsa-West Basin. Poorer or negative correlations with the ash yields in part of the studied basins (i.e. Svoge, Maritsa-West, Sofia, Burgas and Dobrudzha Basins) suggest either mixed or predominantly organic affinity of the elements. Release of Si and Al from the clay minerals during the peat formation/diagenesis and subsequent formation of organo-metallic complexes is considered to responsible for such affinity.

show abstract

Section: Resultsmentioning

confidence: 95%

Silicon and aluminum in Bulgarian coals

Zdravkov¹

2021

Rev. Bulg. Geol. Soc.

View full text Add to dashboard Cite

show abstract

“…This is mainly due to the unusual coal-forming environment of the GH sample (Dai et al., 2008), which has the highest organic sulfur content among all samples and experienced strong biodegradation in the later coalification. The result is the conversion of high carbon number alkanes to low carbon numbers, leading to an increase in the proportion of vibration peaks at 1300–1450 cm −1 (Zhao et al., 2014).…”

Section: Resultsmentioning

confidence: 99%

“…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, 2017, 2018; Li and Tang, 2014; Li et al., 2015; Medunić et al., 2020; Smith and Batts, 1974; Torres-Ordonez et al., 1990; White et al., 1990; Zhao et al., 2014, 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, 2017, 2018; Li and Tang, 2013, 2014; Li et al., 2015; Medunić et al., 2016b; Sinninghe Damsté 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 SHOS coals and their very high organic sulfur contents, are not common and have attracted the attention of researchers (Dai et al., 2008, 2017, 2018; Li and Tang, 2014; Li et al., 2015; Medunić et al., 2020; Smith and Batts, 1974; Torres-Ordonez et al., 1990; White et al., 1990; Zhao et al., 2014, 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, 2017, 2018; Li and Tang, 2013, 2014; Li et al., 2015; Medunić et al., 2016b; Sinninghe Damsté et al., 1999; Smith and Batts, 1974; Torres-Ordonez et al., 1990; White et al., 1990; Zhao et al., 2014). Studying the evolution characteristics of organic sulfur compounds, the source of the organic sulfur, and the relationship between organic sulfur and the coal-forming environment in these special cases can provide guidance for the rational utilization and removal of organic sulfur to achieve clean utilization of coal (Ken and Nandi, 2018; Kumar et al., 2019; Kumar and Kumar, 2018; Liu et al., 2019; Shen et al., 2019; Singh et al., 2012a, 2013, 2018; Medunić et al., 2019).…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

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

Tang

Chen

et al. 2020

Energy Exploration & Exploitation

View full text Add to dashboard Cite

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.

show abstract

“…Mixed organic/inorganic affinity (Beaton et al, 1991;Querol et al, 1997a;Sutcu, Karayiğit, 2015) or predominant inorganic affinity of Fe (Gluskoter et al, 1977;Querol et al, 1997bQuerol et al, , 2001aLiu et al, 2001;Zhao et al, 2017Zhao et al, , 2020Životić et al, 2019;Karayiğit et al, 2020) are much more readily reported. The research of Querol et al (2001b) on the mode of occurrence of selected elements in coal indicates organic affinity of only ~5-12% of iron.…”

Section: Resultsmentioning

confidence: 99%

Factors controlling the occurrence and distribution of iron in Bulgarian coals

Zdravkov¹

2020

Rev. Bulg. Geol. Soc.

View full text Add to dashboard Cite

Coal of varying age (Upper Carboniferous to Pliocene) and coalification rank (lignite to anthracite) from nineteen coal-bearing basins and deposits, belonging to 8 coal-bearing provinces from Bulgaria, were examined for the occurrence and distribution of Fe. For the majority of the coals, the average Fe concentrations vary from 1.1 to 10.2 wt% and are higher than the World’s average. An exception exists only for Karlovo and Dobrudzha Basins, where slight depletion of Fe (<1 wt%) was established. On contrary, carbonaceous shales from the majority of the basins show Fe depletion in comparison to the Clarke values for clays. Based on the negative correlations with the ash yields, organic affinity of the element can be suggested for most of the studied coals. An exception exists for the Burgas Basin, for which predominantly inorganic affinity of the element can be suggested, whereas for Stanyantsi, Samokov, Bobov Dol, Dobrudzha and Svoge Basins mixed organic/inorganic affinity of Fe can be presumed. The element most probably predominantly occurs in the form of organometallic compounds, especially in the coals that formed in preferentially acidic peat-forming environment. Nevertheless, small contribution from biogenic iron cannot be excluded. The mineral form of Fe is probably mainly associated with sulfides, carbonates, and sulfates, although the presence of Fe oxides, silicates and hydroxides is also established. The analysis of Fe occurrence and its organic/inorganic affinity in Bulgarian coals reveal the following controlling factors: i) Fe concentration within the basin’s provenance; ii) the type (i.e. terrigenous or groundwater) of element supply; and iii) environmental conditions during peat-formation.

show abstract

Geochemical characteristics of elements in coal seams 4₁ and 4₂ of Heshan Coalfield, South China

Cited by 12 publications

References 56 publications

Silicon and aluminum in Bulgarian coals

Silicon and aluminum in Bulgarian coals

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

Factors controlling the occurrence and distribution of iron in Bulgarian coals

Contact Info

Product

Resources

About

Geochemical characteristics of elements in coal seams 41 and 42 of Heshan Coalfield, South China

Cited by 12 publications

References 56 publications

Silicon and aluminum in Bulgarian coals

Silicon and aluminum in Bulgarian coals

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

Factors controlling the occurrence and distribution of iron in Bulgarian coals

Contact Info

Product

Resources

About

Geochemical characteristics of elements in coal seams 4₁ and 4₂ of Heshan Coalfield, South China