desulphurization process of coal

Desulfurization of coal using four ionic liquids with [HSO4]−

Desulfurization of coal using four ionic liquids with [HSO4]−

The combined irradiation process of ultrasonic and microwave energy is observed to be the most effective for the beneficiation of highsulfur coal than the single process. The result showed a maximum of % and % ash (mineral matter) removal from the coal samples by microwave followed by an ultrasonic process.

Fuel Desulphurization an overview | ScienceDirect Topics

Fuel Desulphurization an overview | ScienceDirect Topics

The density of pyrite is higher than coal. Therefore, when coal is crushed and washed in water, the particles that are rich in the pyrite sink and the particles that are rich in carbon (organic) float. ... Cutler et al. [44] discloses the use of honeycomb monolithic adsorbents for fuel desulphurization process. The authors further recommend the ...

Dry flue gas desulfurization process for various coals

Dry flue gas desulfurization process for various coals

Flue gas desulfurization (FGD) processes have been widely used since the early 1970's for control of sulfur dioxide emissions from coalfired power plants. First generation FGD systems employ ''wet processes'' whereby the flue gas is contacted with a solution or slurry of an alkali reagent. Most of these installations use either lime or limestone.

Twostep hot coal gas desulphurization process integrated with direct ...

Twostep hot coal gas desulphurization process integrated with direct ...

N2 The paper proposed a twostep desulphurization process using ironbased high temperature sorbents for removal of hydrogen sulfide from hot coal gases after coal gasification. The authors use the mixture of iron oxide with other metal oxides ( Ce) supported by ash from a coalgangue fired power plant to prepare high temperature ...

Removal of Fine Particles from Coal Combustion by ... Springer

Removal of Fine Particles from Coal Combustion by ... Springer

According to the enlargement of fine particles by heterogeneous condensation and typical technology of wet flue gas desulphurization (WFGD) system, a novel process is proposed in this paper to remove fine particles from coalfired flue gas in WFGD system which use limestone as desulfurizer.

Study of the oxidative desulphurization process of coal with different ...

Study of the oxidative desulphurization process of coal with different ...

The oxidative desulphurization process of coal with different metamorphism degrees treated by an airsteam mixture has been studied. It has been shown that the pyrite present in black coal and anthracite is oxidized with the sulphur dioxide formation, and the process chemical mechanism does not depend on the quality of organic matter. ...

Chemical Desulfurization of Coal with Hydroiodic Acid

Chemical Desulfurization of Coal with Hydroiodic Acid

A novel method for the chemical desulfurization of coal in relatively moderate conditions and short times is presented. Using concentrated hydroiodic acid as a desulfurizing agent and microwaves as the energy source, sulfate and pyritic sulfur are completely removed in 10 min. Moreover, for the lowrank coals studied, variable amounts of organic sulfur, up to 70% in 20 min, can be removed, for ...

Review on recent advances in adsorptive desulfurization

Review on recent advances in adsorptive desulfurization

Fly ash, which is a solid waste from coal power plants, was used as a precursor to prepare a zeolitetype adsorbent. This fly ashbased zeolite (Gismondine) was active for desulfurization of a model feed of TH (500 ppm S) and BT (500 ppm S) with 43% and % sulfur removal efficiency [125]. Dolochar is a waste byproduct of the sponge iron ...

Coal Desulfurization via Different Methods Taylor Francis Online

Coal Desulfurization via Different Methods Taylor Francis Online

Most of the effective coal desulfurization techniques are based on chemical methods. Main desulfurization methods are chemical desulfurization, leaching, extraction, flotation, oxydesulfurization and biodesulfurization. The alkaline desulfurization is more effective in removing the pyritic sulfur from the coal, which is the less abundant form ...

(PDF) Desulfurization techniques process and future challenges for ...

(PDF) Desulfurization techniques process and future challenges for ...

The second part examines recent advances in desulphurization techniques and future challenges for commercial, that are being researched around the world and are regulating the manufacture of a new ...

Desulfurization of Coal | Science

Desulfurization of Coal | Science

Coal combustion is the largest single source of sulfur oxide pollution. Treatment of some major representative coals with aqueous ferric solution removes 40 to 75 percent of the sulfur content through near quantitative oxidation of the pyritic sulfur contained in the coal matrix. Elemental sulfur and iron sulfate are recovered as products ...

Indonesia's coal love affair still aflame despite pledges

Indonesia's coal love affair still aflame despite pledges

"There's a major issue around captive coal power stations in Indonesia, that runs the risk of derailing or slowing that JETP process," said Leo Roberts, an analyst at climate think tank E3G.

Flue gas desulphurization based on limestonegypsum with a novel wet ...

Flue gas desulphurization based on limestonegypsum with a novel wet ...

The wet flue gas desulphurization has been the most widely used in the coalfired power plants because of high SO 2 removal efficiency, reliability and ... Meanwhile, the desulphurization process in the PCF device was analyzed using the twofilm theory of gasliquid masstransfer. The results show that the PCF device has low pressure drop ...

Experimental Study on Electrochemical Desulfurization of Coal ... MDPI

Experimental Study on Electrochemical Desulfurization of Coal ... MDPI

The occurrence of sulfur in coal direct liquefaction residue affects its further high quality and high value utilization. Electrochemical desulfurization is characterized by mild reaction conditions, simple operation, easy separation of sulfur conversion products and little influence on the properties of the liquefied residue. An anodic electrolytic oxidation desulphurization experiment was ...

A ManyObjective Optimization for an EcoEfficient Flue Gas ... MDPI

A ManyObjective Optimization for an EcoEfficient Flue Gas ... MDPI

The flue gas desulfurization process in coalfired power plants is energy and resourceintensive but the ecoefficiency of this process has scarcely been considered. Given the fluctuating unit load and complex desulfurization mechanism, optimizing the desulfurization system based on the traditional mechanistic model poses a great challenge. In this regard, the present study optimized the eco ...

Analysis of Desulphurization Process in Circulating Fluidized Bed ...

Analysis of Desulphurization Process in Circulating Fluidized Bed ...

During the project of the technical transformation of a 75t/h CFB boiler, the desulphurization rate, the utilization ratio of CaO, the sintered ratio of CaO, etc. can be got, by the calcium conservation and sulfur conservation according to the analysis of coal and...

(PDF) Desulfurization Electricity Price and Emission Trading ...

(PDF) Desulfurization Electricity Price and Emission Trading ...

1000MW coalfired power plants using limestone gypsum wet desulphurization process are selected as the sample to analyses the relatio nship between coalfired plants' cost and benefit under the ...

Optimization of ammonium sulfate crystals based on orthogonal design

Optimization of ammonium sulfate crystals based on orthogonal design

Study on Ammonium Sulfate Crystallization in the Ammonium Desulphurization Process in a Coalbased Power Plant in the Petrochemical Industry. Energy Sources, Part A: Recov Util Env Effects (2011) Yalin et al. Evaporating crystallization of ammonium sulfate byproduct of ammoniabased desulphurization process.

Comprehensive evaluation of flue gas desulfurization and ... Springer

Comprehensive evaluation of flue gas desulfurization and ... Springer

Since the "Eleventh FiveYear Plan" period, the construction of flue gas desulfurization and denitrification facilities for coalfired power plants have been accelerated to control the emissions of sulfur dioxide (SO 2) and nitrogen oxides (NO X) and thus to address the issue of acid rain in to the goal of the "Thirteenth FiveYear Plan for Energy Saving and Emission ...

BioDesulfurization of Coal Using Biotechnological Approach ... Springer

BioDesulfurization of Coal Using Biotechnological Approach ... Springer

The oxidation process of coal conversion is possible by microorganisms after getting influenced by the polyfunctional coal structure and this process usually ... Beyer, M., Ebner, H. G., Klein, J. (1986). Influence of pulp density and bioreactor design on microbial desulphurization of coal. Applied Microbiology and Biotechnology, 24 ...

Summary of research progress on industrial flue gas desulfurization ...

Summary of research progress on industrial flue gas desulfurization ...

Abstract. Through the purification technology of flue gas desulfurization, ultralow emissions of SO2 flue gas in industrial flue gas can be achieved. This article involves dry desulfurization, semidry desulfurization, and wet desulfurization technologies. The research progress of these technologies since they were first proposed is summarized ...

Coal desulfurization (Journal Article) |

Coal desulfurization (Journal Article) |

article{osti_, title = {Coal desulfurization}, author = {Meyers, R A and Van Nice, L J and Santy, M J}, abstractNote = {The Meyers process of removing pyritic sulfur from coal chemically before it is burned is presented. The process involves the treatment of crushed coal with an aqueous leaching solution of ferric sulfate which reacts with the coal pyrites to yield soluable ferrous ...

Study on the mass transfer of SO2 in ammoniabased desulfurization process

Study on the mass transfer of SO2 in ammoniabased desulfurization process

The coal hydrogen production process requires hightemperature steam as a reactant. Coalfired boilers are usually used to provide hightemperature steam. The ammoniabased desulphurization process is an effective technology to remove SO2 in the coalfired flue gas. However, the mass transfer coefficient of SO2 in such an engineered process is not readily available in the literature. In this ...

Frontiers | Study on the experiment and reaction kinetics of sulfur ...

Frontiers | Study on the experiment and reaction kinetics of sulfur ...

Experimental process and equipment Coal samples pretreatment process. To reduce the impact of soluble impurities in the coal sample on the microbial desulfurization effect, it is necessary to pretreat the coal sample (Chen et al., 2021; Rout et al., 2022), the steps were shown in Figure 3. Appropriate amount of coal sample was put ...

Microorganisms in Coal Desulfurization (Review) | SpringerLink

Microorganisms in Coal Desulfurization (Review) | SpringerLink

Within 30 days, it was possible to reduce the pyrite sulfur content in coal samples by 8595% and the total sulfur content by 3151%. The microorganisms were cultured on a solid nutrient medium, the process of coal desulfurization proceeded at a temperature of 30°C, the pulp density was 10%, and the coal particle size was 74 μm.

Recent advances in flue gas desulfurization gypsum processes and ...

Recent advances in flue gas desulfurization gypsum processes and ...

Flue gas desulfurization gypsum (FGDG) is an industrial byproduct generated during the flue gas desulfurization process in coalfired power plants. Due to its abundance, chemical and physical properties, FGDG has been used in several beneficial applications. However, during the past decade, the rate of beneficially used FGDG has gradually ...

Perspectives in desulfurization of coal using microbes

Perspectives in desulfurization of coal using microbes

The process of bacterial coal desulfurization led to increase in calorific value showing advantage over conventional treatment methods. ... Effect of native bacteria Sinomonas flava 1C and Acidithiobacillus ferrooxidans on desulphurization of Meghalaya coal and its combustion properties. Fuel, 117 (2014), pp. 415421.

Speciation and thermal transformation of sulfur forms ... ScienceDirect

Speciation and thermal transformation of sulfur forms ... ScienceDirect

For the coal pyrolysis process, unstable sulfur compounds will decompose, generate sulfur radicals and release as sulfurcontaining gases, this becomes the main pathway for sulfur removal. Coal properties, minerals and sulfur forms in coal, and pyrolysis conditions such as temperature, atmosphere, and the mass transfer, are the main factors ...

Removal of multiple pollutants in air pollution control devices of a ...

Removal of multiple pollutants in air pollution control devices of a ...

This work was conducted through field tests on a coalfired circulating fluidized bed boiler with a condensation scrubber (CS) for flue gas waste heat recovery installed behind the wet flue gas desulfurization (WFGD) scrubber. Levels of multiple pollutants were investigated along the various flue gas devices of the boiler, with the CS being the ...