Chemical Leaching on Sulfur and Mineral Matter Removal from Asphaltite (Harbul, SE Anatolia, Turkey)

Saydut, Abdurrahman; Duz, M. Zahir; Erdoğan, Serkan; Tonbul, Yalçın; Hamamcı, Candan

doi:10.1080/15567030903030682

Cited by 12 publications

(6 citation statements)

References 30 publications

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“…Assam coal and concluded that effective deashing and desulfurization could be achieved at 95°C with caustic solution treatments. The aqueous caustic leaching has also been reported by Saydut et al (2011) where a Turkish asphaltite sample was treated under varying conditions with aqueous NaOH solution from 0.1 to 1 M concentration with variations in temperature from 100 to 180°C and time 4-16 h. The ash content of the asphaltite reduced from 32.49% to 18% and the total sulfur also dropped to 2.68% from 7.02%.…”

Section: Use Of Alkalis For Demineralisation Of Coalssupporting

confidence: 59%

Advances in the chemical leaching (inorgano-leaching), bio-leaching and desulphurisation of coals

Dhawan

Sharma

2019

Int J Coal Sci Technol

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Coal still remains an important source of power generation world over. Along with its usage, comes unwanted generation of noxious gas emissions, toxic metal releases into wastewater and other pollutants which ultimately lead to environmental concerns. So cleaning of coal through physical or chemical processes becomes utmost important. There are several coals which cannot be cleaned by physical beneficiation techniques to produce low ash cleaner coals. Such coals can be cleaned only through chemical cleaning techniques. The present paper reviews the chemical demineralisation and desulphurisation of coals over the years using various inorganic and organic acids, alkalis, oxidants, leachants and various acids and alkali-acid combinations to reduce the ash and sulphur contents in coals. As high as 90% demineralisation and desulfurization could be achieved with the use of these cheap inorganic acids as compared to the expensive solvents used for solvent extraction processes, a parallel approach of cleaning and refining coals.

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Section: Use Of Alkalis For Demineralisation Of Coalssupporting

confidence: 59%

Advances in the chemical leaching (inorgano-leaching), bio-leaching and desulphurisation of coals

Dhawan

Sharma

2019

Int J Coal Sci Technol

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“…The demineralization of coal with aqueous alkaline solution is reported by several researchers [149][150][151]. Kara and Ceylan [149] have reported similar results for demineralization (91%) of Turkish lignites with NaOH.…”

Section: Alkali Leachingsupporting

confidence: 69%

“…Kara and Ceylan [149] have reported similar results for demineralization (91%) of Turkish lignites with NaOH. The effect of aqueous caustic leaching (ACL) of asphaltite from Turkey was investigated by Saydut et al [151]. Caustic leaching (1 M NaOH) at 180 1C for 16 h reduced the ash content of asphaltite by 44.6%, pyritic sulfur by 83.3%, organic sulfur by 53.9%, total sulfur by 61.82% and volatile matter by 46.29%.…”

Section: Alkali Leachingmentioning

confidence: 99%

Demineralization of low grade coal – A review

Meshram

Purohit

Sinha

et al. 2015

Renewable and Sustainable Energy Reviews

150

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“…2NaOH+R-S→R-SNa 2 (11) Numerous researchers [62][63] stated the demineralization of coal with an aqueous alkali solution. Wang et al, (1986) investigated that the removal of mineral matter from Miler Blend (high ash, 15.5%) and Wandon (low ash, 7%) coal of Australia by treatment with the alkali solution at 460 K. The researchers showed that it is easier to reduce mineral rich components like quartz and kaolinite by alkali treatment although the elimination of Ca and Fe bearing mineral depends on the type of composition in coal [64].…”

Section: Alkali Leachingmentioning

confidence: 99%

A review of chemical leaching of coal by acid and alkali solution

Behera¹,

Kumari²,

Meikap³

2018

J Min & Metal A Mining

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Low rank or low-grade (LRC or LGC) coals are most abundant distribute around the several regions in the world. The contribution of low-rank coal is a significant role in the energy sectors and chemical feedstock to the industries. The hard coal reserves are gradually depleting, and the mining operation at deeper coal seam with greater difficulties as well as the cost of exploration is so high, which has a significant issue for plant economics. Therefore, the low-grade coal can be used as an alternative energy source to minimize these problems. Low-rank coals are usually associated with high mineral matter and moisture content, which exerts substantial impacts on their consumption including pyrolysis, liquefaction, gasification and combustion process. In order to understand the essential treatment of coal for efficient removal of mineral matters and improve coal properties by beneficiation techniques are crucial to developing advanced technologies. The present article provides a comprehensive overview of the various processes concerning demineralization of coal by chemical beneficiation technique. It has been found from the study; the degree of demineralization was greater in chemical beneficiation compared to physical beneficiation. It is because the chemical reagents are attacked to the interior of coal which removes the inorganic materials and finely dispersed minerals from the coal matrix. The chemical methods have separated all types of minerals from the coal matrix. However, the separation of minerals by the physical method depends on the mineral properties. Chemical beneficiation is an appropriate method to reduce both organic and inorganic mineral constituents from the LGC by leaching method. The chemical reagents are diffusing to the interior of coal matrix through the pores and subsequently dissolute the minerals. Throughout the study challenges, the chemical cleaning of low-grade coal has been efficient techniques for reducing the minerals to a minimum level that can be upgraded to high rank coal.

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Chemical Leaching on Sulfur and Mineral Matter Removal from Asphaltite (Harbul, SE Anatolia, Turkey)

Cited by 12 publications

References 30 publications

Advances in the chemical leaching (inorgano-leaching), bio-leaching and desulphurisation of coals

Advances in the chemical leaching (inorgano-leaching), bio-leaching and desulphurisation of coals

Demineralization of low grade coal – A review

A review of chemical leaching of coal by acid and alkali solution

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