Desulfurization of Coal by Pyrolysis and Hydropyrolysis with Addition of KOH/NaOH Quanrun Liu, Haoquan Hu, Shengwei Zhu, Qiang Zhou, Wenying Li, Xianyong Wei, and Kechang Xie View Author Information Cite this: Energy Fuels 2005, 19, 4, Publication Date: April 23, 2005 https:////ef
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Physical desulfurization methods can only remove inorganic sulfur and are economical and practical in nature. 14,15 Highgradient magnetic separation technology is an effective method for physical desulfurization, which can be used to deal with fine particles of paramagnetic minerals and is applied to the desulfurization of fine coal (mainly ...
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In addition, the sulfur content of the raw coal reduces from % to %, total desulfurization rate of %, whose organic sulfur desulfurization is % after coal in shake flask experiments. And the desulfurization rate approaches the maximum value on the tenth day (from Figure 2B). It was demonstrated that strain SX12 could ...
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Coal desulfurization Full Record Related Research Abstract The Meyers process of removing pyritic sulfur from coal chemically before it is burned is presented.
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In addition, the photocatalytic desulfurization process has little effect on the heat value of coal. On a basis of TGDSCDDSC analysis, it is found that the calorific value of the coal after photocatalytic desulfurization was slightly changed and the low temperature oxidation tendency was decreased which is helpful for desulfurized coal storage.
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Sulfur dioxide is the most important precursor of acid rain and one of the major contaminants generated from coalfired power plants. Currently, the limestonegypsum wet fluegas desulfurization (WFGD) system is the most widely used method for removal of SO 2 from powerplant exhaust fumes. However, the gypsum byproduct of limestonegypsum WFGD ...
WhatsApp: +86 18037808511![Process for coal desulfurization. [use of microwave energy]](/xpvza9k/32.jpg)
A process for coal desulfurization generates extremely low amounts of heat from microwave energy to induce thermochemical, insitu, reactions to liberate sulfur in the form of stable gaseous species, such as H/sub 2/S, COS and SO/sub 2/. Inventors:
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In order to achieve better desulfurization effect, the researchers employ methods of adding chemical additives such as acid, alkali, oxidant, reductant, or changing the reaction atmosphere, or combining with other methods such as magnetic separation, ultrasonic and microorganism.
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XANES was used to analyze the change of sulfur forms in the desulfurization process of high organic sulfur coal under microwave heating and conventional heating conditions. The effects of microwave fields on the molecular properties, bond strength and reaction kinetic of organic sulfurcontaining groups were studied by quantum chemical calculation.
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Wet Desulfurization Technology (WFGD) is the main process for flue gas desulfurization in coalfired power plants in China, mainly including limestonegypsum wet method and seawater desulfurization. At the end of 2014, more than % of the desulfurization equipment was WFGD.
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The combined effect of desulfurization and ash removal in the process of coal desulfurization by microwave with peroxyacetic acid was determined by evaluating variations in minerals and sulfur forms using Xray diffraction and Xray photoelectron spectroscopy. Dielectric properties of minerals or organic sulfur functional groups in coal were studied utilizing a vector network analyzer in the ...
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environment, the desulfurization and denitration of flue gas in the combustion process of coal has become an important step. T his work summarizes the desulfur ization and denitration
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Fluegas desulfurization (FGD) is a set of technologies used to remove sulfur dioxide (SO 2) ... into exhaust ducts to eliminate SO 2 and SO 3 from process emissions. For a typical coalfired power station, fluegas desulfurization (FGD) may remove 90 per cent or more of the SO 2 in the flue gases.
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The Energy Information Administration estimates (as of October 2022) that in 2021, CO 2 emissions from burning coal for energy accounted for about 20% of total energyrelated CO 2 emissions and for nearly 60% of total CO 2 emissions from the electric power sector. In the past, fly ash was released into the air through the smokestack ...
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XANES was used to analyze the change of sulfur forms in the desulfurization process of high organic sulfur coal under microwave heating and conventional heating conditions. The effects of microwave fields on the molecular properties, bond strength and reaction kinetic of organic sulfurcontaining groups were studied by quantum chemical calculation.
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Most of the coal, oil and natural gas produced in the world are used as fuels and a small part is used as a chemical feedstock. Undesulfurized coal and oil in the combustion process will produce a large number of sulfur oxides (SOx), serious harm to human health, and environmental damage. The unpurified natural gas containing hydrogen sulfide (H2S) is difficult for industrial application. This ...
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Coal desulfurization Acid leaching Alkaline leaching Oxidation Microwave Ultrasonic 1. Introduction The main uses of coal are to produce coke for iron smelting, or to generate power for social development, or even to provide raw materials for industrial applications.
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As a typical industrial byproduct during the flue gas desulfurization process of coalfired, flue gas desulfurization ash (FGDA) with alkali mineral can facilitate the water damage resistance of asphalt mixtures. However, low density and high hydrophilic coefficient of FGDA limit its improvement effect. Hence, the comprehensive moisture ...
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When the consumed sulphur in coal is in the form of sulphur dioxide at the end of combustion, it reacts with water at high altitudes. Moreover, it goes down to the earth in the form of sulphuric acid, as well as damaging plants. The corrosive harmful impact on industrial plants is the removal of the sulphur in the coal when it is environmental.
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Coal desulfurization has come a long way in the past 15 years, and chemical desulfurization has been at the forefront of this progression. Unfortunately, unless some new technique is developed, the chemical desulfurization processes appears to be at a stalemate. ... The Meyers process of removing pyritic sulfur from coal chemically before it ...
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The increasing use of highsulfur coal contradicts with the stringent environmental pressure in metallurgical industry. Microwave has been confirmed to have efficient effect for coal desulfurization. However, the removal behavior of thiophenic sulfur, as the most difficult sulfur to remove from coal, is still unclear in microwave field. In this work, the feasibility of removing thiophenic ...
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A large amount of SOx will be produced in the combustion process of coal without desulfurization, which is the main factor causing air pollution, environmental damage and increase.
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In this work, the desulfurization process of highsulfur anthracite coal is discussed, and the desulfurization method of "reduced iron powder + heat treatment + magnetic separation" (named "RIHM") is designed. ... In this study, a highsulfur coal desulfurization experiment was carried out for highsulfur raw coal to reveal the internal ...
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In coal combustion, to generate electric power and process heat, the sulfur is emitted as SO2, which is seen as one of the main causes of acid rain. This effect has led to an interest in the three main methods of removing coal sulfur: coal cleaning, inbed desulfurization, and flue gas desulfurization. Coal cleaning includes physical, chemical,
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Flotation desulfurization is the process of separating sulfur from coal samples into tailing products based on the differences in the physical and chemical properties of the mineral surfaces without changing the original sulfur content of the entire coal. ... and {111} facets in alk. soln., which is beneficial to the coal desulfurization. These ...
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For future approaches, as well as desulfurization process, increasing the purity of coal may also promote the value of coal and prevent environment pollution. In the study of Etemadifar et al., growing and resting cells of heterotrophic Rhodococcus erythropolis strains PD1, R1, and FMF, and R. qingshengii were utilized in sulfur removal and ...
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3. TYPES OF COAL Anthracite: This is the highest ranked, hardest, oldest, and least common type of possesses a high energy content, high percentage of carbon (>85%), energy content of 25 million BTU /ton (11,300 BTU/lb). Bituminous: This is the second rank of coal, softer and younger than anthracite, and containing a lower percentage of carbon (45 85%) and therefore more moisture and ...
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In 2010, Li and coworkers demonstrated an extremely rapid, convenient and mild coal desulfurization new process using sodium borohydride and 3141% reduction of total sulphur was achieved (Li et ...
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A material supplier from Belgium would like to produce limestone powder for his custome...
India is rich in various mineral resources and it is an important mineral processing market
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