コロンビアにおける埋立地ガス由来グリーン水素の地点別ポテンシャル・コスト・炭素強度アトラス

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🔬研究者:地点別・確率論的評価手法とCH4スリップの炭素強度感度分析は、廃棄物由来水素研究のベンチマークとして有用。

🏢実務担当者:埋立地ガス由来水素の事業化検討や炭素強度算定における、原料・プロセス選択の判断材料になる。

🏛政策担当者:新興国での廃棄物管理と水素政策の統合、およびCO2輸送・貯留インフラ整備の政策的優先度を示唆。

Landfills emit biogenic CH4 with which green H2 can be produced. However, in developing countries, its territorial potential is unknown. This study presents the first site-resolved national assessment of that potential, with cost and carbon intensity, in Colombia. The 248 disposal sites active in 2024 were analyzed. The CH4 emissions were estimated with a first-order decay model according to the recommendations of the Intergovernmental Panel on Climate Change (IPCC) and the United States Environmental Protection Agency (US EPA). Catalytic reforming and electrolysis projects were evaluated, with Monte Carlo propagation. Through reforming, production was estimated at 76\( kt_{H_{2}} \)/yr if these sites keep receiving waste, and at 46\( kt_{H_{2}} \)/yr if they close when the current licenses expire, whereas through electrolysis, production was estimated at up to 23\( kt_{H_{2}} \)/yr. The estimates indicated that 90% of the national potential is concentrated in 30 landfills, and that 67% of the H2 via reforming (23-89%) costs less than 3USD/\( kt_{H_{2}} \). The CH4 slip proved decisive for the carbon intensity, 0.74\( kg_{CO_2}e \)/\( kt_{H_{2}} \) for reforming and 2.9\( kg_{CO_2}e \)/\( kt_{H_{2}} \) for electrolysis. Capturing the biogenic CO2 generated in reforming would reduce its carbon intensity to -4.1\( kg_{CO_2}e \)/\( kt_{H_{2}} \), provided that the transport and storage of CO2 exist.

• Research Square https://doi.org/10.20944/preprints202610.1345.v1first seen 2026-10-17 04:23:32 · last seen 2026-10-28 04:25:13