バイオガス焚きコンバインドサイクル発電所におけるCCSシナリオのライフサイクル評価：低炭素電力への経路
Life Cycle Assessment of CCS Scenarios in Biogas-Fueled Combined Cycle Power plants: A Pathway to Low-Carbon Power (原題)
Mehrdad Aleagha
🤖 gxceed AI 要約
日本語
バイオガス発電にCCSを統合し、ネットネガティブ排出の可能性をLCAで評価。アミン吸収法は寄生負荷が大きくGWPが77%増加する一方、膜分離法は-2.60×10⁻³ kg CO₂-eq./kWhのネットネガティブを達成。ただし膜寿命短縮やCO₂輸送距離26km超で正味排出に転じ、運用条件への強い依存性を示す。
English
This LCA evaluates CCS integration in biogas-fueled combined cycle power plants for net-negative emissions. Amine-based CCS increases GWP by 77% due to parasitic loads, while membrane-based CCS achieves -2.60×10⁻³ kg CO₂-eq./kWh. Net-negative performance is highly sensitive to membrane lifetime and CO₂ transport distance (>26 km turns it into a net emitter).
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
日本ではバイオマス発電のFIT/FIP制度やCCS実証が進むが、本論文はCCS導入時のエネルギー・ペナルティとライフサイクル排出のトレードオフを定量化し、国内のカーボンニュートラル電源設計やCCS事業性評価に示唆を与える。
In the global GX context
As global disclosure frameworks (TCFD/ISSB) increasingly demand Scope 3 and life-cycle emissions, this study highlights that CCS-equipped bioenergy is not automatically carbon-negative. It provides quantitative thresholds for net-negative claims, relevant to CSRD and transition finance criteria for low-carbon power.
👥 読者別の含意
🔬研究者:CCS統合バイオガス発電のLCAにおける寄生負荷とネットネガティブ達成条件を定量化した点が参考になる。
🏢実務担当者:CCS導入時のエネルギー損失と膜寿命・輸送距離の管理が、カーボンニュートラル主張の信頼性を左右することを示す。
🏛政策担当者:バイオエネルギーCCSのネットネガティブ認定には、ライフサイクル評価と運用閾値の設定が不可欠である。
📄 Abstract（原文）
Biogas-fuelled power generation is conventionally treated as carbon-neutral. However, by applying CCS into this biogas-to-electricity chain, net-negative CO₂ emissions can be achieved. This study evaluates the life-cycle environmental performance of such integration for a combined cycle power plant, assuming a baseline 98% CO₂ capture rate. The system boundary encompasses biogas supply, upgrading, power generation, and downstream CO₂ handling. Three configurations were assessed based on a functional unit of 1 kWh of net electricity: conventional amine-based (C-CCS), carbon molecular sieve membrane-based (MB-CCS), and a non-capture reference (C-NoCCS). The implementation of CCS imposes severe parasitic loads. Compared to the C-NoCCS net output of 5771 kW, net electricity generation drops by 33% in C-CCS (3835 kW) due to thermal and solvent demands, and by 45% in MB-CCS (3141 kW) driven by high compression requirements. These energy penalties dictate the Life Cycle Assessment (LCA) results. Because of its simpler configuration, C-NoCCS performs best in 11 of 18 non-climate indicators. The capture burdens in the C-CCS scenario outweigh the storage credit, increasing Global Warming Potential (GWP) by 77% compared to the reference system. The MB-CCS configuration avoids solvent regeneration, yielding a net-negative climate impact of -2.60 × 10⁻³ kg CO₂-eq./kWh. This net-negative performance strictly depends on specific operational thresholds. A reduction in membrane lifetime from 10 to 2.5 years shifts the MB-CCS system to a net emitter (+5.10 × 10⁻³ kg CO₂-eq./kWh). An increase in CO₂ transport distance crosses the net-zero GWP threshold at approximately 26 km. The viability of biogas-CCS systems requires minimizing energy penalties, ensuring membrane durability, and mitigating transport logistics.
🔗 Provenance — このレコードを発見したソース
- openalex https://amslaurea.unibo.it/view/cds/CDS8894/>,first seen 2026-10-11 04:42:42
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