Removal of Sulfur and Ash from Coal Using Molten Caustic Leaching, a Case Study from Hazro Fields, Turkey

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

doi:10.1260/0144-5987.27.6.391

Cited by 26 publications

(14 citation statements)

References 31 publications

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“…However, these mineral phase diffraction peaks almost disappear in the XRD pattern of PHSC, indicating that most of the inorganic minerals and sulfur impurities in HSC sample were removed by the MCL treatment. For understanding the chemical principle on the MCL process, the related chemical equations are shown as follows:

4 {FeS}_{2} + 20 NaOH \to 4 {NaFeO}_{2} + 8 {Na}_{2} normalS + 10 H_{2} normalO + O_{2},

{SiO}_{2} + 2 NaOH \to {Na}_{2} {SiO}_{3} + H_{2} normalO,

{Al}_{2} O_{3} + 2 NaOH \to 2 {NaAlO}_{2} + H_{2} normalO .

…”

Section: Resultsmentioning

confidence: 99%

Purified high‐sulfur coal as a fuel for direct carbon solid oxide fuel cells

Jiao

Xue

et al. 2018

Int J Energy Res

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Summary The use of low‐rank coal in a clean and efficient manner is a major challenge facing the current coal technology. A high‐sulfur coal with 4.5 wt% sulfur is chosen to examine the compatibility of the pristine coal and the purified contrast with a solid oxide fuel cell (SOFC) with nickel cermet anodes. Desulfurization of the pristine coal is performed by molten caustic leaching method with a removal ratio of 80%. Analyses of the physicochemical properties of coal samples indicate that the purified coal has a more favorable structure and higher Boudouard reactivity, which is suitable as a fuel for fuel cells. The assessment of electrochemical performance reveals that the purification treatment not only makes the peak power density of SOFCs improve from 115 to 221 mW cm−2 at 900°C but also extends their durability from 1.7 to 11.2 hours under a current density of 50 mA cm−2 at 850°C with a fuel availability increasing from 6.25% to 40%. The postmortem analyses show that far less deposited carbon and nickel sulfide are observed on the anode surface. The fuel‐based investigation reveals that the purified coal is a promising fuel for direct carbon fuel cells.

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4 {FeS}_{2} + 20 NaOH \to 4 {NaFeO}_{2} + 8 {Na}_{2} normalS + 10 H_{2} normalO + O_{2},

{SiO}_{2} + 2 NaOH \to {Na}_{2} {SiO}_{3} + H_{2} normalO,

{Al}_{2} O_{3} + 2 NaOH \to 2 {NaAlO}_{2} + H_{2} normalO .

…”

Section: Resultsmentioning

confidence: 99%

Purified high‐sulfur coal as a fuel for direct carbon solid oxide fuel cells

Jiao

Xue

et al. 2018

Int J Energy Res

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“…The complete removal of pyritic sulfur, 70% organic sulfur and ash and 70-79% volatile matter from asphaltites were reported with alkali at a 1:1 ratio with asphalite at 400 1C for 45 min followed by wash with 1 M HCl. Ash content was reduced from 18.3% to 6.8% from a coal of Hazro fields, Turkey and 70% of combustible was recovered with the MCL process [171].…”

Section: Leaching Of Coal With Alkali Followed By Acidmentioning

confidence: 99%

Demineralization of low grade coal – A review

Meshram

Purohit

Sinha

et al. 2015

Renewable and Sustainable Energy Reviews

153

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“…Air pollution from energy utilization in the country is due to the combustion of coal, lignite, petroleum, natural gas, wood and agricultural and animal wastes. In Turkey, the combustion of high sulfur lignites is one of the fundamental reasons for the problem with SO 2 emissions (Zahir Duz et al, 2009). Sulfur corrosion is a problem specific for Turkey and other countries burning high-sulfur lignites (Balat, 2008b).…”

Section: Environmental Pollution Problemsmentioning

confidence: 99%

The Assessment of Coal's Contribution to Sustainable Energy Development in Turkey

Erdem¹

2010

Energy Exploration & Exploitation

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Turkey's energy consumption has grown and will continue to grow along with its economy. Energy demand of the country is growing by 8% annually, one of the highest rates in the world. Turkey has very limited oil, natural gas and hard coal reserves. Turkey is currently heavily dependent on imports to meet its energy demand because of limited domestic energy resources. Lignite is the country's most important domestic energy source. Turkey has approximately 10400 million tons of lignite and 1300 million tons of hard coal reserves. This paper analyzed the structure of coal consumption over the past three decades in Turkey using the information of relevant researches and the published statistical data, and also analyzed the changing trends in the energy consumption structure, to provide some reference for the development of energy in Turkey. This work has attracted considerable interest because the subject of coal energy and its effect in the daily lives of people maintains a keen interest. The paper examines entirely new areas of coal energy research, summarizes recent trends, and discusses the most important current methods used to produce coal fuels.

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Removal of Sulfur and Ash from Coal Using Molten Caustic Leaching, a Case Study from Hazro Fields, Turkey

Cited by 26 publications

References 31 publications

Purified high‐sulfur coal as a fuel for direct carbon solid oxide fuel cells

Purified high‐sulfur coal as a fuel for direct carbon solid oxide fuel cells

Demineralization of low grade coal – A review

The Assessment of Coal's Contribution to Sustainable Energy Development in Turkey

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