Effect of Coke Type on Partial Replacement of Coke with Modified Biocoke in Anodes Used in Primary Aluminum Production

Amara, Belkacem; Kocaefe, Duygu; Kocaefe, Yasar S.; Bhattacharyay, Dipankar; Côté, Jules; Gilbert, André

doi:10.1007/978-3-030-92529-1_108

Cited by 5 publications

(9 citation statements)

References 9 publications

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“…Thus, higher H and C ratios can increase the yield of biochar and solid biofuel. The atomics ratios of the sawdusts depend on the variation of the thermal degradation which can decrease H, C, and O ratios because of the loss of the hydroxyl groups and the deoxygenation, dehydration, and dehydrogenation reactions [50]. The lower atomic H/C and O/C ratios of biomass indicate the efficacy of thermal degradation of the biomass due to higher aromatic and carbonaceous formation at above 400˚C.…”

Section: Ultimate Compositionsmentioning

confidence: 99%

Physicochemical and Thermal Properties of Some Key Tropical Sawdust Woods for Energy Production

Kaoke,

Brech,

Talla

et al. 2024

JSBS

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Section: Ultimate Compositionsmentioning

confidence: 99%

Physicochemical and Thermal Properties of Some Key Tropical Sawdust Woods for Energy Production

Kaoke,

Brech,

Talla

et al. 2024

JSBS

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“…Pyrometallurgical treatment and the addition of binders can be used to improve its performance by engineering its properties. 132,133 Charcoal should not be harvested from primary forest to be considered environmentally friendly. 90 Tuyere injection and coke substitution in blast-furnaces While bio-carbon could theoretically replace all the fossil carbon added to a blast furnace, there are practical limitations which diminish its CO 2 mitigation potential.…”

Section: Bio-charmentioning

confidence: 99%

Section: Greener Reactants and Recycled Feeds In Pyrometallurgymentioning

confidence: 99%

“…Those drawbacks are linked to its increased porosity, lack of sulfur and greater presence of hetero-elements. 133 Presently, standard anode properties are kept when at most 3 wt% bio-coal are used. 133 , 140 The physico-chemical properties of biocoal also prevent its proper surface wetting by the softened tar, which ultimately decreases the performance of the baked anodes.…”

Section: Greener Reactants and Recycled Feeds In Pyrometallurgymentioning

confidence: 99%

“… 133 Presently, standard anode properties are kept when at most 3 wt% bio-coal are used. 133 , 140 The physico-chemical properties of biocoal also prevent its proper surface wetting by the softened tar, which ultimately decreases the performance of the baked anodes. There are other possibilities to increase the use of bio-coal and bio-tar in anode production 141 ; the most realistic approaches being the replacement of fossil binder material by a bio-based binder and the partial substitution of coke in the formulation of the anode paste.…”

Section: Greener Reactants and Recycled Feeds In Pyrometallurgymentioning

confidence: 99%

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Greener reactants, renewable energies and environmental impact mitigation strategies in pyrometallurgical processes: A review

Harvey

Courchesne

et al. 2022

MRS Energy & Sustainability

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Metals and alloys are among the most technologically important materials for our industrialized societies. They are the most common structural materials used in cars, airplanes and buildings, and constitute the technological core of most electronic devices. They allow the transportation of energy over great distances and are exploited in critical parts of renewable energy technologies. Even though primary metal production industries are mature and operate optimized pyrometallurgical processes, they extensively rely on cheap and abundant carbonaceous reactants (fossil fuels, coke), require high power heating units (which are also typically powered by fossil fuels) to calcine, roast, smelt and refine, and they generate many output streams with high residual energy content. Many unit operations also generate hazardous gaseous species on top of large CO2 emissions which require gas-scrubbing and capture strategies for the future. Therefore, there are still many opportunities to lower the environmental footprint of key pyrometallurgical operations. This paper explores the possibility to use greener reactants such as bio-fuels, bio-char, hydrogen and ammonia in different pyrometallurgical units. It also identifies all recycled streams that are available (such as steel and aluminum scraps, electronic waste and Li-ion batteries) as well as the technological challenges associated with their integration in primary metal processes. A complete discussion about the alternatives to carbon-based reduction is constructed around the use of hydrogen, metallo-reduction as well as inert anode electrometallurgy. The review work is completed with an overview of the different approaches to use renewable energies and valorize residual heat in pyrometallurgical units. Finally, strategies to mitigate environmental impacts of pyrometallurgical operations such as CO2 capture utilization and storage as well as gas scrubbing technologies are detailed. This original review paper brings together for the first time all potential strategies and efforts that could be deployed in the future to decrease the environmental footprint of the pyrometallurgical industry. It is primarily intended to favour collaborative work and establish synergies between academia, the pyrometallurgical industry, decision-makers and equipment providers. Graphical abstract Highlights A more sustainable production of metals using greener reactants, green electricity or carbon capture is possible and sometimes already underway. More investments and pressure are required to hasten change. Discussion Is there enough pressure on the aluminum and steel industries to meet the set climate targets? The greenhouse gas emissions of existing facilities can often be partly mitigated by retrofitting them with green technologies, should we close plants prematurely to build new plants using greener technologies? Since green or renewable resources presently have limited availability, in which sector should we use them to maximize their benefits?

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Partial Replacement of Coke with Biocoke: Effect of Biocoke Production Temperature on Anode Quality

Amara

Kocaefe

et al. 2023

The Minerals, Metals &Amp; Materials Series

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Effect of Coke Type on Partial Replacement of Coke with Modified Biocoke in Anodes Used in Primary Aluminum Production

Cited by 5 publications

References 9 publications

Physicochemical and Thermal Properties of Some Key Tropical Sawdust Woods for Energy Production

Physicochemical and Thermal Properties of Some Key Tropical Sawdust Woods for Energy Production

Greener reactants, renewable energies and environmental impact mitigation strategies in pyrometallurgical processes: A review

Partial Replacement of Coke with Biocoke: Effect of Biocoke Production Temperature on Anode Quality

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