Analyzing the Formation of Gaseous Emissions during Aluminum Melting Process with Utilization of Oxygen-Enhanced Combustion

Dzurňák, Róbert; Varga, Augustín; Jablonský, Gustáv; Variny, Miroslav; Pástor, Marcel; Lukáč, Ladislav

doi:10.3390/met11020242

Cited by 3 publications

(3 citation statements)

References 33 publications

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“…Energies 2023, 16, 6313 3 of 28 Some scientific articles mention energy efficiency issues but focus on other things, such as technology development or a computational model [13,14]. Energy intensity can be reduced by implementing both current and new energy efficiency measures.…”

Section: Methodological Analysis Of the Primary Aluminium Production ...mentioning

confidence: 99%

“…The control is based on daily discrete measurements and qualitative analyses updated at least three times a week. The automatic control systems of cryolite ratio "TROLL" and "Stella" calculate the optimal additives by the sum of three independent variable components dynamically reacting to the perturbation each on its own channel for deviation from the nominal value [14]:…”

Section: Construction Of Conceptual and Mathematical Modelmentioning

confidence: 99%

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Developing a Comprehensive Mathematical Model for Aluminium Production in a Soderberg Electrolyser

Ilyushin,

Kapostey

2023

Energies

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The technological process of aluminium electrolysis is a complex scientific and technical task. This is due to a large number of internal, external and resultant factors. The aim of this work is to analyse these factors, assess them and their influence on the technological process of electrolysis and develop a comprehensive and mathematical model of aluminium production in the Soderberg electrolyser. The work analyses the technological process of primary aluminium production on the basis of the Bayer method and then on the basis of the Hall–Eru method. The existing methods and technologies for computer modelling of the technological process are analysed. The modern methods of analysis for thermal and electromagnetic fields in electrolysers are considered. On the basis of an in-depth analysis, a number of factors influencing the process of primary aluminium production are identified. Using the methods of system analysis to analyse the identified factors, a ranked list of factors according to the degree of influence is obtained. Using the Pareto diagram, we obtain a list of factors with maximum impact. A conceptual model of the technological process is derived. Based on the obtained conceptual model, the mathematical model of the technological process is derived. The conducted research may be useful to specialists in the field of metallurgy for the analysis of the technological processes of primary aluminium production.

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Section: Methodological Analysis Of the Primary Aluminium Production ...mentioning

confidence: 99%

Section: Construction Of Conceptual and Mathematical Modelmentioning

confidence: 99%

Developing a Comprehensive Mathematical Model for Aluminium Production in a Soderberg Electrolyser

Ilyushin,

Kapostey

2023

Energies

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“…Oxygen is widely used in metallurgy [8,17,18], cutting down fuel costs and greenhouse gas emissions [19,20], for oxy-combustion coupled with carbon capture and storage [9,21], production of a variety of chemicals, and in medicine [22,23].…”

Section: Introductionmentioning

confidence: 99%

Cutting Oxygen Production-Related Greenhouse Gas Emissions by Improved Compression Heat Management in a Cryogenic Air Separation Unit

Variny

Jediná

Rimár

et al. 2021

IJERPH

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Oxygen production in cryogenic air separation units is related to a significant carbon footprint and its supply in the medicinal sphere became critical during the recent COVID-19 crisis. An improved unit design was proposed, utilizing a part of waste heat produced during air pre-cooling and intercooling via absorption coolers, to reduce power consumption. Variable ambient air humidity impact on compressed air dryers’ regeneration was also considered. A steady-state process simulation of a model 500 t h−1 inlet cryogenic air separation unit was performed in Aspen Plus® V11. Comparison of a model without and with absorption coolers yielded an achievable reduction in power consumption for air compression and air dryer regeneration by 6 to 9% (23 to 33 GWh year−1) and a favorable simple payback period of 4 to 10 years, both depending on air pressure loss in additional heat exchangers to be installed. The resulting specific oxygen production decrease amounted to EUR 2–4.2 t−1. Emissions of major gaseous pollutants from power production were both calculated by an in-house developed thermal power plant model and adopted from literature. A power consumption cut was translated into the following annual greenhouse gas emission reduction: CO2 16 to 30 kilotons, CO 0.3 to 2.3 tons, SOx 4.7 to 187 tons and NOx 11 to 56 tons, depending on applied fossil fuel-based emission factors. Considering a more renewable energy sources-containing energy mix, annual greenhouse gas emissions decreased by 50 to over 80%, varying for individual pollutants.

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Hydrogen Oxyfuel Combustion for Energy-Intensive Industries

Iplik¹,

Adendorff²,

Muren³

2022

Clean Energy Technologies - Hydrogen and Gasification Processes

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Hydrogen has been seen as a decarbonization enabler for the last few decades, and in the last couple of years, there have been many investments in its production through renewables and use in different industrial applications. It is often researched for energy storage, and combustion is an excellent alternative to recover the energy stored in hydrogen. It might be the most viable alternative, especially when it comes to energy-intensive metal and glass production processes. The utilization of hydrogen as a fuel in these processes would reduce greenhouse gas emissions significantly, considering their share in total emissions. Since these industries already benefit from oxyfuel combustion with traditional fuels for fuel savings, part of the infrastructure already exists for hydrogen oxyfuel combustion. Fuel change is expected to require some minor adjustments other than simply changing the oxidizer; however, each industry has specific points to consider. This chapter investigates metal and glass production processes based on their needs and challenges in using hydrogen oxyfuel combustion for heating. Additionally, possible exhaust gas stream improvements are suggested to recover energy and reduce emissions. Finally, safety aspects of hydrogen and oxygen use are discussed together with the community acceptance of hydrogen use.

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Analyzing the Formation of Gaseous Emissions during Aluminum Melting Process with Utilization of Oxygen-Enhanced Combustion

Cited by 3 publications

References 33 publications

Developing a Comprehensive Mathematical Model for Aluminium Production in a Soderberg Electrolyser

Developing a Comprehensive Mathematical Model for Aluminium Production in a Soderberg Electrolyser

Cutting Oxygen Production-Related Greenhouse Gas Emissions by Improved Compression Heat Management in a Cryogenic Air Separation Unit

Hydrogen Oxyfuel Combustion for Energy-Intensive Industries

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