Research on the slagging behaviors of Shenhua coal in different combustion atmospheres

Wu, Haibo; Liu, Zhaohui; Chen, Wei; Zhang, Tai; Sun, Qiang; Liao, Haiyan

doi:10.1016/j.fuel.2020.118537

Cited by 11 publications

(5 citation statements)

References 30 publications

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“…It suggests that changes in ash particle size also affect its deposition behavior in oxyfuel combustion, and should be further considered. In the recent work by Wu et al, significant effects of oxyfuel combustion on ash composition were observed, resulting in stronger particle adhesiveness and enhanced particle aggregation. Consequently, the slagging trend was obviously higher in oxyfuel combustion than in air combustion (at the same O 2 level).…”

Section: Ash Formation and Deposition In Oxy-pfcmentioning

confidence: 99%

A Comprehensive Review of Ash Issues in Oxyfuel Combustion of Coal and Biomass: Mineral Matter Transformation, Ash Formation, and Deposition

et al. 2021

Energy Fuels

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To alleviate the global warming issue, various CO 2 abatement technologies have been proposed. As one of the leading options for CO 2 capture in power plants mostly firing coal and biomass, the oxyfuel combustion technology has been actively developed for decades. Progress at different stages of the development has been continuously updated in several reviews. However, they usually cover a wide range of topics, which vary significantly in detail. The ash issues are very critical to the design and operation of oxyfuel boilers, but may be one of the most controversial topics. The knowledge is widely scattered in different research articles, and a relatively comprehensive description is not available in the published reviews. Therefore, it is difficult for one to have a clearer picture of this important topic. The present review attempts to provide a more complete understanding. It pays particular attention to experimental data, because they are the basis for model development and full-scale simulation. Different from previous reviews that presented limited information on mineral matter transformation under oxyfuel conditions, this Review summarizes most of the related results reported in the open literature. Data on ash formation and deposition in oxyfuel combustion are also updated. They are organized according to different combustion technologies, i.e., oxyfuel pulverized fuel combustion (oxy-PFC) and oxyfuel fluidized bed combustion (oxy-FBC). By correlating between the three aspects, an in-depth understanding of ash issues in oxyfuel combustion may be achieved. At the end of this Review, key messages regarding mineral matter transformation, ash formation and deposition in oxyfuel combustion, and future research needs are presented.

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Section: Ash Formation and Deposition In Oxy-pfcmentioning

confidence: 99%

A Comprehensive Review of Ash Issues in Oxyfuel Combustion of Coal and Biomass: Mineral Matter Transformation, Ash Formation, and Deposition

et al. 2021

Energy Fuels

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“…In the issue of O 2 /CO 2 combustion of coal, some scholars often use weighted sum of grey gas method(WSGG) to improve the calculation accuracy due to the presence of more H 2 O and CO 2 in the furnace. 12,13,21 In this study, BFG was employed as boiler fuel, which still contains more N 2 , so the choice of radiation model needs further study. A comparative study of different radiation model calculations will be conducted in the future.…”

Section: Radiation Characteristics Under O 2 /Co 2 Combustionmentioning

confidence: 99%

“…At present, most research on the O 2 /CO 2 combustion characteristics focused on coal [9][10][11][12][13] and biomass, [14][15][16][17] while the combustion characteristics of BFG and COG under oxygen-enriched conditions are rarely studied. The O 2 /CO 2 atmosphere in O 2 /CO 2 combustion is different from the traditional O 2 /N 2 atmosphere.…”

mentioning

confidence: 99%

Numerical investigation of blast furnace gas and coke oven gas combustion under different O₂/CO₂ environments

Zhang

et al. 2022

Greenhouse Gases

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A numerical model of a 75 t/h gas‐fired boiler burning blast furnace gas (BFG) and coke oven gas (COG) was developed to study the effect of O2/CO2 conditions on the combustion characteristics, verified by comparing with the results measured in field experiments. The results showed that the ignition distance of COG was shorter than that of BFG, and COG reached the stable combustion temperature of 1000 K earlier in the condition of O2/CO2 combustion with 31% O2 than in the condition of air combustion. Under different O2/CO2 conditions, the overall temperature of gas‐fired boiler decreased. The maximum temperature of air combustion, O2/CO2 combustion with 26% O2, and O2/CO2 combustion with 31% O2 were 1867, 1678, and 1834 K, respectively. Under the condition of O2/CO2 combustion, the radiation heat transfer of mixed gas was enhanced, and the overall heat flux was obviously improved. Under the O2/CO2 condition, the overall temperature was lower than that of air combustion, but the wall heat flux increased. The NOx production decreased after the change to O2/CO2 combustion, and the NOx generation at the furnace arch decreased from 70.28 mg/m3 to 6.94 mg/m3 under the condition of O2/CO2 combustion with 26% O2. © 2022 Society of Chemical Industry and John Wiley & Sons, Ltd.

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“…3 Oxy-combustion (O 2 /CO 2 ) has become an important topic in the aspect of energy conservation and emission reduction, due to its high efficiency in the reduction of CO 2 emission. 4,5 Because CO 2 and N 2 have different gas properties, the combustion characteristics and kinetic parameters of O 2 /CO 2 combustion are different from those of air combustion. 6,7 The combustion in O 2 /CO 2 combustion conditions has higher activation energy values as compared with that in an air combustion atmosphere.…”

Section: Introductionmentioning

confidence: 99%

“…CO 2 is considered as the main factor of global warming, , which is chiefly discharged from coal-fired power plants . Oxy-combustion (O 2 /CO 2 ) has become an important topic in the aspect of energy conservation and emission reduction, due to its high efficiency in the reduction of CO 2 emission. , Because CO 2 and N 2 have different gas properties, the combustion characteristics and kinetic parameters of O 2 /CO 2 combustion are different from those of air combustion. , The combustion in O 2 /CO 2 combustion conditions has higher activation energy values as compared with that in an air combustion atmosphere . The application of O 2 /CO 2 combustion technology in large coal-fired power plants allows the effective capture of CO 2 .…”

Section: Introductionmentioning

confidence: 99%

Experimental and Kinetic Analysis of H₂O on Hg⁰ Removal by Sorbent Traps in Oxy-combustion Atmosphere

Wang

Shen

et al. 2021

Ind. Eng. Chem. Res.

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Oxy-combustion technology is under development for CO2 capture. H2O could influence the Hg0 removal by sorbent traps in an oxy-combustion atmosphere. A study of the effects of H2O on Hg0 removal by biomass char under oxy-combustion conditions is presented in this paper. The kinetic model analysis was conducted to study the adsorption process of Hg0, which included a pseudo-first-order kinetic model, a pseudo-second-order kinetic model, and intraparticle diffusion kinetic model. Experimental results showed that a low-level of H2O had a promoting effect on the adsorption of Hg0, and high-level of H2O had an inhibiting effect. A high concentration of H2O would form a water film on the surface of sorbent traps to hinder the removal of external mass transfer on Hg0. Although the adsorption rate of Hg0 depended both on external mass transfer and intraparticle diffusion, external mass transfer was a more important controlling factor. It was found that physical adsorption was one of the main forms of Hg0 removal on the surface of sorbent traps, owing to the large specific surface area and good pore structure of the modified corn straw char. The removal of Hg0 was mainly attributed to capture by physical adsorption and the formation of HgO by chemisorption.

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Research on the slagging behaviors of Shenhua coal in different combustion atmospheres

Cited by 11 publications

References 30 publications

A Comprehensive Review of Ash Issues in Oxyfuel Combustion of Coal and Biomass: Mineral Matter Transformation, Ash Formation, and Deposition

A Comprehensive Review of Ash Issues in Oxyfuel Combustion of Coal and Biomass: Mineral Matter Transformation, Ash Formation, and Deposition

Numerical investigation of blast furnace gas and coke oven gas combustion under different O₂/CO₂ environments

Experimental and Kinetic Analysis of H₂O on Hg⁰ Removal by Sorbent Traps in Oxy-combustion Atmosphere

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Research on the slagging behaviors of Shenhua coal in different combustion atmospheres

Cited by 11 publications

References 30 publications

A Comprehensive Review of Ash Issues in Oxyfuel Combustion of Coal and Biomass: Mineral Matter Transformation, Ash Formation, and Deposition

A Comprehensive Review of Ash Issues in Oxyfuel Combustion of Coal and Biomass: Mineral Matter Transformation, Ash Formation, and Deposition

Numerical investigation of blast furnace gas and coke oven gas combustion under different O2/CO2 environments

Experimental and Kinetic Analysis of H2O on Hg0 Removal by Sorbent Traps in Oxy-combustion Atmosphere

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Product

Resources

About

Numerical investigation of blast furnace gas and coke oven gas combustion under different O₂/CO₂ environments

Experimental and Kinetic Analysis of H₂O on Hg⁰ Removal by Sorbent Traps in Oxy-combustion Atmosphere