Optimizing the coke oven process by adjusting the temperature of the combustion chambers

Neto, G.W. Farias; Leite, Mariana Bessa; Marcelino, T.O.A.C.; Carneiro, L.O.; Brito, Karoline Dantas; Brito, Romildo Pereira

doi:10.1016/j.energy.2020.119419

Cited by 16 publications

(5 citation statements)

References 10 publications

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“…Therefrom, the COG is sent to the ironmaking unit. 21 This research used Australian bituminous coal with heating values of 24,000 kJ/kg as the raw material for the coke production unit with proximate and its ultimate composition analysis reported elsewhere. 22,23 The composition of the acquired coke, COG, coal tar, and BTX were referenced from the work of Qin and Chang.…”

Section: Process Simulationmentioning

confidence: 99%

Study of lime flow rate on calcium looping carbon capture for steel plant

Sungsook,

Srinophakun

2024

Ironmaking & Steelmaking: Processes, Products and Applicati

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Calcium looping carbon capture was simulated for a steel plant and three fuel cases were studied: coal, coke, and half coal/coke. The steelmaking production was about 1.2 t of liquid steel per hour at >99.85% purity by weight. This study evaluated the effect of carbon capture efficiency and raw material cost on the lime flow rate in the calcium looping section. Increasing the lime feeding flow rate achieved higher efficiency but at a higher cost. The overall captured efficiency was higher than the flue gas captured efficiency at a low lime feeding flow rate but lower at a high lime feeding flow rate. Then, the overall captured efficiency tended to decrease at high lime feeding flow rate because raw materials were used too much for carbon capture and caused overall carbon dioxide emission more than the content of captured carbon dioxide in the product stream. Coal as fuel plays an important role in carbon emission reduction as one of the raw materials, along with the utility cost and the raw material cost in calcium looping section.

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Section: Process Simulationmentioning

confidence: 99%

Study of lime flow rate on calcium looping carbon capture for steel plant

Sungsook,

Srinophakun

2024

Ironmaking & Steelmaking: Processes, Products and Applicati

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“…In their numerical study, Neto et al used Aspen Plus software to simulate and examine the impact of a coke oven battery's combustion chamber temperature on fuel consumption. They claim that a new set of regulations can save the amount of gas used in coke ovens by 12% [27]. A numerical study conducted by Veinskii developed a couple of equations for the energy balance of a coke oven as well as the material balance of the coking process.…”

Section: Literature Reviewmentioning

confidence: 99%

An applied study on energy analysis of a coke oven

Ergul,

Selimli

2024

STET

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In this study, the energy view of an oven of a 70-oven coke battery in an iron and steel plant was evaluated based on operating parameters and recommendations for improving efficiency were made. A mass and energy balance per coking period (p) was created for a coke oven. It was found that during each coking period, 51.2% of the energy input was used as coking heat. It is predicted that approximately 6.91% of the input energy can be recovered from flue gas into the combustion air. By recovering the heat from the flue gas into the combustion air, the efficiency of the coke oven can be increased to 58.11%. The heat of the coke oven gas can be recovered and converted into usable form, which accounts for 6.53% of the total energy input. With the dry quenching process, it is possible to recover around 24% of the energy used from coke. Improved oven insulation, heat recovery from coke and flue gases, and the dry quenching process can recover energy worth more than 25.19 GJ/p. The energy efficiency of the furnace was predicted to rise to 82.11% with coke dry quenching and to more than 88.64% with coke gas heat recovery and insulation upgrades. The potential economic savings are $2578, equivalent to a reduction in CO₂ emissions of 2.45 tons per coking period. The financial equivalent of emissions reductions from carbon trading could be $233 per coking period. Through the processes of dry coke quenching, coke gas (CG), and flue gas heat recovery and thermal insulation improvements of the coke battery, the total amount of recoverable energy can exceed 617,294 GJ/year.

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“…Coke and aluminum oxide are both produced using a different technique from the other combustion sources, specifically focusing on creating high temperature, oven-like conditions to bake/roast their products. The average temperature of the coke oven charring chamber and aluminum oxide roasting furnace are around 1000°C ( Neto et al, 2021;Abyzov, 2019), with the material temperature continuously held in that temperature for a long period of time, e.g., one day. At the same time, the oxygen content is low.…”

Section: Application Of 𝛼 $ To Analyze Different Combustion Technologiesmentioning

confidence: 99%

Mass-Conserving Inversion of NOx Emissions and Inferred Combustion Technologies in Energy Rich Northern China Based on Multi-Year Daily Remotely Sensed and Continuous Surface Measurements

Cohen

Qin

et al. 2022

Preprint

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Nitrogen oxides (NOx) are markers of combustion contributing to ozone, secondary aerosol, and acid rain, and are required to run models focusing on atmospheric environmental protection. This work presents a new model free inversion estimation framework using daily TROPOMI NO 2 columns and observed fluxes from the continuous emissions monitoring systems (CEMS) to quantify emissions of NOx at 0.05°×0.05°. The average emission is 0.72±0.11Tg/yr from 2019 through 2021 over Shanxi, a major energy producing and consuming province in Northern China. The resulting emissions demonstrates significant spatial and temporal differences with bottom-up emissions databases, with 54% of the emissions concentrated in 25% of the total area. Two major forcing factors are horizontal advective transport (352.0±51.2km) and first order chemical loss (13.1±1.1hours), consistent with a non-insignificant amount of NOxadvected into the free troposphere. The third forcing factor, the computed ratio of NOx/NO 2 , on a pixel-by-pixel basis has a significant correlation with the combustion temperature and energy efficiency of large energy consuming sources. Specifically, thermal power plants, cement, and iron and steel companies have high NOx/NO 2 ratios, while coking, industrial boilers, and aluminum show low ratios. Variance maximization applied to the daily TROPOMI NO 2 columns identifies three modes dominate the variance and attributes them to this work's computed emissions, remotely sensedTROPOMI UVAI, and transport based on TROPOMI CO. Using satellite observations for emission estimates in connection with CEMS allows the rapid update of emissions, while also providing scientific support for the identification and attribution of anthropogenic sources.

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Optimizing the coke oven process by adjusting the temperature of the combustion chambers

Cited by 16 publications

References 10 publications

Study of lime flow rate on calcium looping carbon capture for steel plant

Study of lime flow rate on calcium looping carbon capture for steel plant

An applied study on energy analysis of a coke oven

Mass-Conserving Inversion of NOx Emissions and Inferred Combustion Technologies in Energy Rich Northern China Based on Multi-Year Daily Remotely Sensed and Continuous Surface Measurements

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