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 ...
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Desulfurization is the removal of sulfur or sulfur compounds (as from coal or flue gas), mostly from fuels. The most commonly required desulfurization process is in natural gas, but it is also required for flue gas, coal and oil. Sulfur in crude oil, natural gas, process gas and natural gas liquids (LNG) may take many forms, including hydrogen ...
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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 ...
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In this study, coal fly ash was functionalized, using a simple onestep process (loading with Al3+ and sulfonation), to yield a solid acid catalyst (S/AlCFA) with strong acid sites. The catalyst was then used to produce furfural from xylose in a biphasic system (H2O(NaCl)/tetrahydrofuran). The furfural yield reached 82% at 180 °C60 min with catalyst/xylose ratio of : (w/w).
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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 ...
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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...
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A series of mesoporous xLayMn/KIT6 sorbents with different La/Mn atomic ratios were fabricated by a solgel method and their desulphurization properties in hot coal gas were investigated at 700 ...
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Therefore, exhaust gas from burning process with high sulphur coal must be treated by installations for removal of SO 2. Due to the high cost of these installations and under the increasing limitations of SO 2 emissions, predesulphurization of coal is essential.
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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 ...
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Coal combustion products ( CCP 's) are the inorganic residues that remain after pulverized coal is burned. Coarse particles (bottom ash and boiler slag) settle to the bottom of the combustion chamber), and the fine portion (fly ash, fig. 1) is removed from the flue gas by electrostatic precipitators or other gasscrubbing systems. Figure 1.
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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 ...
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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 ...
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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 ...
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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. The effects of the heating temperature, heating time and coaliron mass ratio on desulfurization were discussed, the process of ...
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The FlueGas Desulfurization (FGD) process utilizes a set of technologies to remove sulfur dioxide (SO 2) from the flue gas emissions of coalfired power systems were developed as a response to the exhaust flue gases from fossil fuelburning plants, principally coalburning, that posed both an environmental and human health hazard.
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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 ...
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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 ...
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1 INTRODUCTION. The coal is still one of the indispensable fuels in the world. In recent years, 93% of electric power is produced from coal in South Africa, 79% in China, 78% in Australia, 68% in India, and 39% in America. 1 However, a large amount of SO 2 and other sulfurcontaining gases was released into the atmosphere in the process of highsulfur coal combustion, resulting in ...
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Desulfurization techniques process and future challenges for commercial of crude oil products: Review ... and challenges of existing HDS processes. 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 ...
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To reduce the risk of spontaneous combustion during coal storage and transportation, microbial desulfurization technology is used to reduce the content of inorganic sulfur in coal. A strain of Aciditithiobacillus ferrooxidans was purified from coal mine water in Datong, Shanxi Province, and its desulfurization test conditions were optimized. Taking the inorganic sulfur removal rate of coal as ...
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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 ...
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Coal is a nonrenewable fossil fuel and has been used as a main source of energy for centuries. Fossil fuels are utilized as not only for energy production but also the raw material as the main inputs for many industries such as paint, plastic, pharmaceutical, cosmetics, iron steel and aluminum production (Prayuenyong 2002).However, the use of coal, both the energy source of some of the major ...
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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.
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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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