セメント工場からのCCUによるグリーンレンガ生産の確率的テクノエコノミック・環境最適化
Stochastic Techno-Economic and Environmental Optimization of Carbon Capture and Utilization (CCU) from Cement Plant for Green Brick Production (原題)
S. Chai, B. S. How, L. Ngu
🤖 gxceed AI 要約
日本語
セメントキルンダスト（CKD）をCO2で鉱物化しグリーンレンガ（CKD-BLB）を製造するCCUプロセスの実現可能性を、テクノエコノミック分析（TEA）で評価した。吸収塔サイズを変数とする多目的確率最適化の結果、67.93m³でNPV最大3,165.38百万ドル、CO2回避量21,337.41 Mt-CO2が最適となった。感度分析ではCKD-BLB価格がNPVに最も影響し、±50%変動でNPVが100%以上変動する。
English
This study evaluates a CCU process that mineralizes cement kiln dust (CKD) with captured CO2 to produce green bricks (CKD-BLB) via techno-economic analysis. A multi-objective stochastic optimization found an optimal absorber size of 67.93 m³, yielding a maximum NPV of $3,165.38 million and CO2 avoidance of 21,337.41 Mt-CO2. Sensitivity analysis shows CKD-BLB price is the most influential parameter on NPV, with ±50% variation causing over 100% change.
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
セメント産業は日本のGX推進で重要な排出削減対象であり、CCUによる廃棄物活用とCO2固定はカーボンニュートラル戦略に資する。SSBJやTCFD開示において、企業がCCU投資の経済性とCO2削減効果を定量的に示す際の参考事例となる。
In the global GX context
This paper contributes to the global CCUS literature by providing a stochastic TEA framework for CCU in the cement sector, a hard-to-abate industry. It offers quantitative evidence on the trade-off between profitability and CO2 avoidance, relevant for transition finance and climate disclosure under ISSB/CSRD.
👥 読者別の含意
🔬研究者:CCUプロセスの確率的TEA手法と多目的最適化の適用例として参考になる。
🏢実務担当者:セメント企業がCCU投資の経済性評価やCO2削減量の定量化に活用できる。
🏛政策担当者:産業脱炭素化のためのCCU支援策や炭素価格設計の根拠として参考になる。
📄 Abstract（原文）
While carbon capture and utilization (CCU) technology often face economic challenges, CCU via carbon mineralization with solid waste offers a cost-effective solution. In this work, the feasibility of a proposed CCU process that utilizes captured CO2 from the accelerated weathering of limestone (AWL) process to mineralize cement kiln dust (CKD) to produce a green brick termed CKD-bicarbonate lime brick (CKD-BLB) was evaluated with techno-economic analysis (TEA). The main variable that affects the techno-economic feasibility of the proposed CCU process is the absorber size, as it dictates the amount of captured CO2 and producible CKD-BLB. This variable also indirectly impacts the environmental aspect, as different absorber sizes contribute to varying degrees of CO2 avoidable. Thus, this work conducts a multi-objective stochastic optimization to determine the optimal absorber size with consideration of profitability and CO2 avoidance. It was found that the optimal absorber size of 67.93 m3 achieved a maximum NPV of $ 3,165.38 million with a desirable CO2 avoidance of 21,337.41 \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$${\text{M}\text{T}}_{{\text{C}\text{O}}_{2}}$$\end{document}. Although increasing the absorber size to 93.96 m3 would increase the process’s avoidable CO2 by 2.87%, the 3.22% drop in its NPV result is a less favorable tradeoff between the two aspects. A sensitive analysis was also conducted, and the results indicate that among CKD-BLB price, electricity cost and water cost, the CKD-BLB price is the most sensitive parameter affecting the NPV of the proposed process. A ± 50% variation in CKD-BLB price leads to more than a 100% shift in NPV, while at a ± 50% variation in electricity and water costs results in less than a 30% change. Overall, the insights generated in this work enable strategic planning for decisions making.
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- semanticscholar https://link.springer.com/content/pdf/10.1007/s41660-026-00733-w.pdffirst seen 2026-10-12 05:07:14 · last seen 2026-10-13 05:07:12
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