木炭生産からのガスエネルギー回収：可能性、利用可能技術、コスト、持続可能性、ブラジルのエネルギー転換への貢献

Energy Recovery of Gases from Charcoal Production:Potential, Available Technologies, Costs, Sustainability, and Its Contribution to the Energy Transition in Brazil (原題)

Oliveira, Guilherme Mandelo, Julio, Alisson Aparecido Vitoriano, Venturini, Osvaldo José, Leme, Márcio Montagnana Vicente, de Rezende, Túlio Tito Godinho, Palacio, José Carlos Escobar, Lora, Electo Eduardo Silva

Oliveira, G M, Julio, A A V, Venturini, O J, Leme, M M V, de Rezende, T T G, Palacio, J C E & Lora, E E S 2026, 'Energy Recovery of Gases from Charcoal Production : Potential, Available Technologie...📚 査読済 / ジャーナル2026-02-01#エネルギー転換対象セクター: manufacturing

DOI: 10.3390/pr14030511

原典: https://vbn.aau.dk/da/publications/e400ac66-fad9-4662-adfe-e191911bd6b0

🤖 gxceed AI 要約

日本語

ブラジルのミナスジェライス州の木炭生産から排出されるガスを利用した発電の可能性を評価。3つの技術（蒸気ランキンサイクル、有機ランキンサイクル、外部燃焼ガスタービン）を比較し、最大1348GWh/年の発電ポテンシャルを試算。経済分析では現状の条件では10MW未満のプラントは非現実的と結論。ライフサイクル評価では木炭1トンあたり2437.7kgCO2eqの排出を推定し、持続可能な対策で57%以上の削減が可能と示した。

English

This study evaluates electricity generation from gases emitted during charcoal production in Minas Gerais, Brazil, comparing three technologies: Steam Rankine Cycle, Organic Rankine Cycle, and Externally Fired Gas Turbine. The maximum potential is 1348 GWh/year using a regenerative ORC. Economic analysis shows that plants below 10 MW are unfeasible under current conditions. Life cycle assessment estimates 2437.7 kg CO2 eq per ton of charcoal, with sustainable measures potentially reducing emissions by over 57%.

Unofficial AI-generated summary based on the public title and abstract. Not an official translation.

📝 gxceed 編集解説 — Why this matters

日本のGX文脈において

日本では木炭生産は小規模だが、廃熱回収やバイオマスエネルギー利用の技術は日本の産業にも応用可能。特に、未利用エネルギーの活用やLCAによる排出削減評価は、日本のカーボンニュートラル政策やSSBJ開示において参考になる。

In the global GX context

This paper provides empirical evidence on waste-heat recovery and life cycle assessment in a developing country context, which is relevant for global discussions on energy transition and sustainable biomass use. It highlights the economic barriers to small-scale waste-to-energy projects, offering insights for policymakers and investors in similar contexts.

👥 読者別の含意

🔬研究者:Provides a comprehensive techno-economic and environmental assessment of waste-heat recovery in charcoal production, useful for comparative studies in other regions.

🏢実務担当者:Offers insights into the feasibility of waste-heat-to-power projects, including cost and emission reduction potentials, relevant for biomass and charcoal industries.

🏛政策担当者:Highlights the need for supportive policies and economic incentives to make small-scale waste-to-energy projects viable, relevant for energy transition strategies.

📄 Abstract（原文）

Minas Gerais is Brazil’s largest charcoal producer, relying on carbonization kilns that release effluent gases and waste energy while generating environmental impacts. This work evaluates the electricity generation potential from these gases using different conversion technologies. A database-based assessment of charcoal production units, based on official institutional records, enabled estimating the energy potential for 2020 and projecting it to 2030. Three technologies were assessed: Steam Rankine Cycle, Organic Rankine Cycle, and Externally Fired Gas Turbine. For each one, efficiencies were calculated and applied to the surveyed producers, ranging from 5% to 24% for power capacities between 100 kW and 2000 kW. The highest energy generation potential, 1348 GWh/year, was obtained using the regenerative and superheated ORC with n-decane as the working fluid. In addition, an economic analysis was performed based on Brazilian electricity auction prices, together with a sensitivity analysis of key variables, including installed power, electricity price, minimum attractiveness rate, taxes, operating hours, and capital expenditure. The results demonstrate that current technical and economic conditions are unfavorable for implementing waste-heat-based power plants in Minas Gerais. Plants below 10 MW are especially unfeasible. A Life Cycle Assessment estimated emissions of 2437.7 kg CO 2 eq per ton of charcoal. Sustainable measures such as eliminating native wood use, increasing Gravimetric Yield, and adding afterburners could reduce emissions by over 57%.

🔗 Provenance — このレコードを発見したソース

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