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process for removing sulfur and ash from coal

Process for removing sulfur and ash from coal

In U.S. Pat. No. 4,328,002, there is disclosed a process for treating coal to remove sulfur and ash which involves the steps of preconditioning coal particles in the presence of an aqueous solution of an oxidizing agent, e.g., detergent; washing the pretreated coal with water; contacting the coal with an aqueous solution of an oxidizing agent until an exothermic reaction between the coal and oxidizing agent peaks and the pH drops to the range of 2 to 3; removing the coal from the oxidizing

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Process for removing sulfur and ash from coal (Patent

OSTI.GOV Patent: Process for removing sulfur and ash from coal

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Process for removing sulfur and ash from coal

US-4537599-A chemical patent summary.

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Process for removal of sulfur and ash from coal

OSTI.GOV Patent: Process for removal of sulfur and ash from coal

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Process for removal of sulfur and ash from coal

A process for reducing the sulfur and ash content of coal wherein coal particles are treated with a conditioning agent in an aqueous slurry prior to agglomeration with a minor amount of hydrocarbon oil.

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Process for removal of sulfur and ash from coal

A process for reducing the sulfur and ash content of coal comprising: treating coal particles in a hydrocarbon oil slurry with minor amounts of a conditioning agent and water to effect agglomeration of ash and pyritic sulfur mineral matter; separating the agglomerates from the slurried coal particles; and recovering coal particles from the hydrocarbon oil.

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US4537599A Process for removing sulfur and ash

A process is disclosed for removing sulfur and ash, particularly clay and pyrite from coal particles having a mesh size of 30 or less. A slurry of coal particles is agitated in an ultrasonic mixer...

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Process for removing sulfur from coal (Patent)

A process is claimed for reducing the sulfur and ash content of coal comprising the steps of: (1) contacting coal particles containing ash and iron pyrite mineral matter with a promoting amount of at least one conditioning agent capable of modifying or altering the existing surface characteristics of the pyrite under conditions to effectuate alteration or modification of at least a portion of the contained pyritic sulfur; (2) agglomerating the coal

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Process for removal of sulfur and ash from coal

A process for reducing the sulfur and ash content of coal particles wherein coal particles are treated in an aqueous slurry with a minor amount of hydrocarbon oil to form coal-oil aggregates having modified particle size and density characteristics.

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How to Remove Sulphur from Coal 911 Metallurgist

2017-9-1 · The combination gravity and flotation methods demonstrate the technical feasibility of processing fine size coal to effectively remove sulfur and ash to recover high quality clean coal products which meet or exceed specifications for commercial grade coal as regards to Btu value, and ash and sulfur

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Process for removing sulfur and ash from coal

US-4537599-A chemical patent summary.

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removal sulfur, ash coal processing

PROCESS FOR PRODUCING LOW_ASH, LOW_SULFUR COAL. rites, can be removed from coal by leaching fine-size coal with a hot caustic physical separation process which reduced both the ash and total sulfur contents.

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Removal of sulfur and ash from coal using molten caustic

2018-2-14 · ENERGY EXPLORATION & EXPLOITATION · Volume 27 · Number 6 · 2009 pp. 391-400 391 Removal of sulfur and ash from coal using molten caustic leaching, a case study from Hazro fields, Turkey M. Zahir Duz1, Abdurrahman Saydut2,*, Sait Erdogan1 and Candan Hamamci1 1Dicle University, Science and Art Faculty, Chemistry Department, Diyarbakir TR-21280, TURKEY

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Removal of Organic Sulfur from Coal by Wheat Straw Ash

2018-3-2 · sulfur, either pyritic and/or organic sulfur predominates in most of the coals (Borah and Baruah, 2000; Rimstidt and Vaughan, 2003). Desulfurization is an important commercial and environmental process for high sulfur coals. The removal of sulfur from coal has recently become even more critically important (Ramachandra, 2004).

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Process for Removing Sulfur and Producing Enhanced

2019-7-11 · Process for Removing Sulfur and Producing Enhanced Quality and Environmentally Acceptable Products for Energy Production from Coal John M. Stencel University of Kentucky Francis J. Derbyshire University of Kentucky Right click to open a feedback form in a new tab to let us know how this document benefits you.

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Desulfurization of Coal EOLSS

2017-1-16 · 3. Coal Cleaning for Sulfur Removal The coal cleaning process has traditionally focused on reducing ash-reforming minerals and not necessarily aimed at removing sulfur in coal until recently. However, increasingly stringent regulations for SOx emissions during coal combustion have encouraged technical development of coal cleaning for sulfur

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"Coal desulfurization and demineralization by

2014-11-10 · Several chemical and physical cleaning methods for removing sulfur and ash-forming mineral matter from various kinds of bituminous coal were investigated. These methods involved grinding coal to a fine size to expose or liberate the mineral matter and either physical separation or chemical leaching of the resulting particles. By combining these methods, a multistep process was developed

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"Process for Removing Sulfur and Producing

A process for producing enhanced quality adsorbent carbons and environmentally acceptable materials for energy production from coal includes an initial step of physically cleaning the coal to remove organic sulfur and mineral tailings. Next, a coal slurry of feedstock and water is prepared. Phosphoric acid is then mixed into the water of the coal slurry to provide by volume 15-85% and more

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Coal desulfurization and demineralization by chemical

2020-10-13 · Ames super clean coal process 292 Magnetic cleaning of chemically treated coals 292 LITERATURE CITED 294 ACKNOWLEDGEMENTS 311 . vi ABSTRACT Several chemical and physical cleaning methods for removing sulfur and ash-forming mineral matter from various kinds of bituminous coal were investigated. These methods involved grinding coal to a fine size

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International Best Practices Regarding Coal Quality

2013-2-25 · and sulfur content . Ash and sulfur are inorganic and have no heating value . The higher the ash content, the lower the heating value of raw coal (i .e ., coal straight from the mine mouth) . Many lower heating-value coals, or “lower rank” coals, as they are referred to in the industry, have ash content of 40% or higher . Removing the ash

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