Mass Balance, Yield, and Carbon-Credit Economics of Biochar from Certified Wood Pellets: A Single-Batch Tube-in-Tube Pyrolysis Snapshot
認証木材ペレット由来バイオ炭のマスバランス、収率、炭素クレジット経済性：単一バッチ管中管熱分解のスナップショット (AI 翻訳)
damien spagnuolo
🤖 gxceed AI 要約
日本語
本論文は、認証木材ペレットを用いた単一バッチのバイオ炭製造実験において、マスバランス、収率（乾量ベース30.3%）、生産コスト（約7.29ユーロ/kg）、炭素除去コスト（約3,540ユーロ/tCO2）を報告。EU ETS価格と比較して現状では経済性が不十分であることを示し、原料コストが制約要因であると結論づけた。
English
This paper presents a fully mass-balanced batch of biochar from certified wood pellets, reporting a dry yield of 30.3%, production cost of ~EUR 7.29/kg, and implied carbon-removal cost of ~EUR 3,540/tCO2. Comparison with the EU ETS allowance price (~EUR 74-75/tCO2) shows a ~45x gap even in this small-scale study, identifying feedstock cost as the primary economic constraint.
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
日本ではバイオ炭のJ-クレジット化や農地施用が進んでおり、本論文の透明性の高いコスト分析は国内の炭素除去プロジェクトの経済性評価に直接的な示唆を与える。特に原料コストがボトルネックである点は、日本の輸入木材ペレット依存や国産バイオマス供給体制の議論と整合する。
In the global GX context
As biochar gains attention as a carbon dioxide removal (CDR) technology under voluntary carbon markets and potential future regulatory frameworks, this study offers a transparent, reproducible baseline for production cost and carbon-credit economics. The large gap to EU ETS prices highlights the need for policy support or innovative business models to make biochar-based CDR viable.
👥 読者別の含意
🔬研究者:Provides a transparent mass-balance methodology and cost breakdown useful for benchmarking and scaling studies.
🏢実務担当者:Offers a realistic cost estimate for small-scale biochar production, highlighting feedstock cost as the key barrier.
🏛政策担当者:Demonstrates the economic gap between current biochar production costs and carbon prices, underscoring the need for subsidies or carbon credit mechanisms.
📄 Abstract（原文）
A single, fully mass-balanced batch of biochar was produced from ENplus A1 certified wood pellets (Austrian softwood, predominantly fir/spruce) in a small, externally fired tube-in-tube reactor operated under oxygen-limited conditions for 40 min. The endpoint was defined operationally by the cessation of wood-vinegar (pyroligneous) condensation. From 349.5 g of as-received pellets, the batch yielded 97.3 g of solid biochar, 114.8 g of condensed wood vinegar, and 137.4 g of non-condensable gas plus minor system losses by difference (39.3 % of input mass). The biochar yield was 27.8 % on an as-received basis and 30.3 % on a dry basis, in the upper half of the 20-35 % range typical of slow pyrolysis. The char bulk density was 324 kg m-3, roughly half the feedstock pellet density (600-750 kg m-3), corresponding to a 72 % mass reduction and a substantial gain in porosity. The non-condensable off-gas (pyrogas) was tested and found to be non-combustible, consistent with the low calorific value of wood-derived producer gas. A raw-material cost analysis, including external firing fuel, gives a production cost of approximately EUR 7.29 per kg of biochar and an implied carbon-removal cost of approximately EUR 3,540 per tonne CO2-equivalent. Benchmarked against the May 2026 EU Emissions Trading System allowance price (~EUR 74-75 per tonne CO2), this batch is ~45x too costly to break even; even under idealized autothermal operation the gap remains ~9x. The results establish a transparent, reproducible baseline and identify feedstock cost, not pyrolysis chemistry, as the binding constraint on carbon-negative economics at this scale.
🔗 Provenance — このレコードを発見したソース
- openalex https://doi.org/10.5281/zenodo.20506169first seen 2026-06-17 05:45:53 · last seen 2026-06-17 09:17:09
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