![Desulfurization of coal using four ionic liquids with [HSO4]−](/jz0uirb/60.jpg)
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.
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 ...
An anodic electrolytic oxidation desulphurization experiment was carried out on the liquefaction residue of the byproduct of a coaltoliquid enterprise in the slurry state. An electrochemical test and material characterization of raw materials before and after electrolysis showed that electrolytic oxidation can desulfurize the liquefaction ...
In the process of use, highsulfur coal will produce many sulfurcontaining substances, resulting in acid rain, haze and other pollution to the ecological environment (Chen et al., 2019). Coal cleaning technology has become a key link to control environmental pollution caused by coal burning (Yue et al., 2021).
1. Introduction. Coal is the dominant fossil energy in China and continues to play an important role in the next few decades [1].However, during coal direct utilization processes, some sulfurcontaining gases (H 2 S, SO 2 and COS, etc) would release into the air, and cause some seriously environmental pollution [2].Thus, some highsulfur coals need to be desulfurized before their utilization.
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. ...
Sulfur in coal exists in inorganic and organic forms, the former being mostly pyritic sulfur. Total sulfur contents in major coalfields are in the range of roughly wt%. 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 ...
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 ...
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 ...
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 ...
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 ...
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 ...
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 ...
How to reduce the energy consumption of the rotary kilnelectric furnace (RKEF) process has become an important issue for the stainless steel industry. The aim of this study is to reduce the energy consumption of ferronickel production from saprolite nickel laterite in the RKEF process. The effects of the slag binary basicity, FeO content, and Cr2O3 content on the melting temperature and ...
"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.
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 ...
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 ...
CoalFired Boiler Flue Gas Desulfurization System Based on Slurry Waste Heat Recovery in Severe Cold Areas. Chenghu Zhang, 1 Dezhi Zou, 1, 2, * Xinpeng Huang, 1, * and Weijun Lu 1 ... In the process of mass exchange, when other factors are neglected, as the water in the slurry enters the flue gas, the reduced mass of the slurry should be equal ...
![Process for coal desulfurization. [use of microwave energy]](/jz0uirb/257.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:
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. The effects of the heating temperature, heating time and coaliron mass ratio on desulfurization were discussed, the process of ...
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.
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