Numerical investigation of 660 MW pulverized coal-fired supercritical power plant retrofitted to oxy-coal combustion

Yadav, Sujeet; Mondal, Subha

doi:10.1016/j.ijggc.2020.103227

Cited by 20 publications

(4 citation statements)

References 46 publications

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“…24 Due to the replacement of nitrogen with recycled CO 2 , there will be a high CO 2 concentration in the flue gas stream with 90% of CO 2 on a dry base, and the recovery and sequestration of CO 2 become much easier. 27,28 Moreover, the substitution of carbon dioxide instead of nitrogen in this technology helps to prevent the emission of NO x as an undesirable product of air combustion technology. 29 Yushiie et al 30 conducted experimental and numerical analysis on the effect of NO x formation in the oxyfuel combustion technology, and their results confirmed that NO x emissions under CO 2 −O 2 conditions were lower than those under "air" conditions.…”

Section: Monoethanolamine (Mea) Is a Useful Solvent In Industrialmentioning

confidence: 99%

“…Due to the replacement of nitrogen with recycled CO 2 , there will be a high CO 2 concentration in the flue gas stream with 90% of CO 2 on a dry base, and the recovery and sequestration of CO 2 become much easier. , Moreover, the substitution of carbon dioxide instead of nitrogen in this technology helps to prevent the emission of NO x as an undesirable product of air combustion technology …”

Section: Introductionmentioning

confidence: 99%

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Oxyfuel Combustion Makes Carbon Capture More Efficient

Talei,

Fozer,

Varbanov

et al. 2024

ACS Omega

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Fossil energy carriers cannot be totally replaced, especially if nuclear power stations are stopped and renewable energy is not available. To fulfill emission regulations, however, points such as emission sources should be addressed. Besides desulfurization, carbon capture and utilization have become increasingly important engineering activities. Oxyfuel technologies offer new options to reduce greenhouse gas emissions; however, the use of clean oxygen instead of air can be dangerous in the case of certain existing technologies. To replace the inert effect of nitrogen, carbon dioxide is mixed with oxygen gas in the case of such air combustion processes. In this work, the features of carbon capture in five different flue gases of air combustion and such oxyfuel combustion where additional carbon dioxide is mixed with clean oxygen are studied and compared. The five different flue gases originate from the gas-fired power plant, coal-fired power plant, coal-fired combined heat and power plant, the aluminum production industry, and the cement manufacturing industry. Monoethanolamine, which is an industrially preferred solvent for carbon dioxide capture from gas streams at low pressures, is selected as an absorbent, and the same amount of carbon dioxide is captured; that is, always that amount of carbon dioxide is captured, which is the result of the fossil combustion process. ASPEN Plus is used for mathematical modeling. The results show that the oxyfuel combustion cases need significantly less energy, especially at high carbon dioxide removal rates, e.g., higher than 90%, than that of the air combustion cases. The savings can even be as high as 84%. Moreover, 100% carbon capture was also be completed. This finding can be due to the fact that in the oxyfuel combustion cases, the carbon dioxide concentration is much higher than that of the air combustion cases because of the inert carbon dioxide and that higher carbon dioxide concentration results in a higher driving force for the mass transfer. The oxyfuel combustion processes also show another advantage over the air combustion processes since no nitrogen oxides are produced in the combustion process.

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Section: Monoethanolamine (Mea) Is a Useful Solvent In Industrialmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Oxyfuel Combustion Makes Carbon Capture More Efficient

Talei,

Fozer,

Varbanov

et al. 2024

ACS Omega

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“…In the most coal fired thermal generating plants, water serves as the primary fluid for the process of converting fossil fuels into electricity [1][2][3]. The design and construction of supercritical power plants have received a greater amount of attention due to the possibility that raising the temperature of the steam that enters the turbine could improve thermal efficiency and lessen environmental pollution [4]. However, when the steam temperature in a supercritical boiler exceeds 973 K, the metal materials normally used in pressure piping will react with the high temperature steam [5].…”

Section: Introductionmentioning

confidence: 99%

Numerical Investigation of the Influence of Furnace Wall Temperature on Pulverized Coal Combustion and NO_x Emissions in a Supercritical CO₂ Boiler

Li¹,

Zhang

2023

J. Phys.: Conf. Ser.

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A study on the combustion process and NOx emission of pulverized coal in a supercritical CO2 boiler was carried out by using the method of numerical simulation. Using a comprehensive combustion model and a post-treatment NOx formation model, the influence of wall temperature on the characteristics of combustion and NOx emissions of a 300 MW tangential coal-fired boiler were studied. The temperature field and the concentration distribution of waste flue gas at the furnace outlet are analysed and studied. It was found that the furnace wall temperature seriously affected both the distribution of the temperature field and the emission of NOx. The supercritical CO2 boiler’s partial flow strategy led to further increases in temperature and NOx near the tail. According to the results of the calculations, the supercritical CO2 boiler might raise the exhaust gas temperature, making the difficulty of extracting energy from waste gas increased dramatically. The increased NOx emissions will lead to higher cost for implementation of after treatment of NOx emissions. The work’s findings can be used to improve the design of coal-fired supercritical CO2 boilers as well as gain a deeper comprehension of the formation of NOx.

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“…5,6 In recent years, many combustion technologies were applied to reduce the use of fossil fuels and the emissions of CO 2 and NO x such as multi-fuel combustion, oxyfuel combustion, and postcombustion. [7][8] There has owned an increasing amount of literature on multi-fuel combustion of alternative fuels and coal in the boiler. For example, the effects of fat coal and lean coal, 9 pulverized coal and BFG, 10 pulverized coal and biomass, [11][12][13] and pulverized coal and sludge [14][15][16] mixing on the mixed-fired boiler are studied through numerical simulations.…”

Section: Introductionmentioning

confidence: 99%

Experimental study on multi‐fuel combustion of lean coal and by‐product gas in a 75t/h tangentially‐fired boiler

Zhou

2021

Env Prog and Sustain Energy

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By-product gas is used as an alternative energy for steel mills to relieve the pressure of the fossil fuel crisis. In order to study the influence of blending by-product gas on boiler operation, the multi-fuel combustion experiments on the mixture of coke oven gas (COG), blast furnace gas (BFG), and lean coal were carried out in a 75t/h multifuel combustion boiler so as to determine the most balanced fuel formula. The results indicated that the mixed combustion of COG and lean coal could improve the boiler efficiency. However, the balance of by-product gas utilization in steel mills was destroyed for not using BFG. Although mixed combustion of BFG and COG improved the boiler efficiency, the boiler could only be operated under low load because of lower furnace temperature. After applying the most balanced flue ratio of BFG, COG, and lean coal, with heat value rations of 35%, 35%, and 30%, respectively, the efficiency of the boiler became 77.21%. The flue gas temperature lowered 4.5 C and the carbon content of fly ash and boiler slag were reduced by 1.06% and 1.09%, respectively. As a result, the stand coal consumption of the boiler decreased by 226.1 kg/h with the ratio of coal saving being 3.3%.

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Numerical investigation of 660 MW pulverized coal-fired supercritical power plant retrofitted to oxy-coal combustion

Cited by 20 publications

References 46 publications

Oxyfuel Combustion Makes Carbon Capture More Efficient

Oxyfuel Combustion Makes Carbon Capture More Efficient

Numerical Investigation of the Influence of Furnace Wall Temperature on Pulverized Coal Combustion and NO_x Emissions in a Supercritical CO₂ Boiler

Experimental study on multi‐fuel combustion of lean coal and by‐product gas in a 75t/h tangentially‐fired boiler

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Numerical investigation of 660 MW pulverized coal-fired supercritical power plant retrofitted to oxy-coal combustion

Cited by 20 publications

References 46 publications

Oxyfuel Combustion Makes Carbon Capture More Efficient

Oxyfuel Combustion Makes Carbon Capture More Efficient

Numerical Investigation of the Influence of Furnace Wall Temperature on Pulverized Coal Combustion and NOx Emissions in a Supercritical CO2 Boiler

Experimental study on multi‐fuel combustion of lean coal and by‐product gas in a 75t/h tangentially‐fired boiler

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Numerical Investigation of the Influence of Furnace Wall Temperature on Pulverized Coal Combustion and NO_x Emissions in a Supercritical CO₂ Boiler