Complementary Effects of Coal Fly Ash and Ash-Derived Zeolite on Oil Well Cement for Carbon Capture and Storage
CO2回収貯留のための石炭フライアッシュと灰由来ゼオライトの油井セメントへの相補的効果 (AI 翻訳)
Roger Braun Ledesma, Giovanni dos Santos Batista, Marçal Rodrigues Pires, Eleani Maria da Costa
🤖 gxceed AI 要約
日本語
本研究は、CCUS用途向け油井セメントにおける石炭フライアッシュ（CFA）とCFA由来ゼオライトの併用効果を調査。CO2飽和水中での水和挙動、微細構造、機械的特性を評価し、5Z10CFA配合が最も優れた性能を示した。産業副産物の循環利用とセメント耐久性向上を両立可能とする。
English
This study investigates the combined use of coal fly ash (CFA) and CFA-derived zeolite in oil well cement for CCS. Blends were tested under CO2-saturated conditions at 90°C and 15 MPa. The 5Z10CFA formulation showed improved reactivity, microstructure, and compressive strength, promoting circular use of industrial byproducts while enhancing well integrity.
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CCSの実証・事業化が進み、油井セメントの耐久性が課題。本成果は石炭灰の有効活用とCCS坑井の長期的な健全性向上に寄与し、国内の石炭火力発電所から排出されるフライアッシュの循環利用にも示唆を与える。
In the global GX context
Globally, CCUS deployment requires durable well cements to ensure long-term CO2 containment. This paper demonstrates that CFA and zeolite blends can maintain or improve cement performance under high-pressure CO2 conditions, supporting the use of industrial byproducts in carbon storage infrastructure.
👥 読者別の含意
🔬研究者:Provides experimental data on hybrid CFA/zeolite cement systems under CCS-relevant conditions, valuable for further material development.
🏢実務担当者:Indicates a promising cement formulation (5Z10CFA) for oil well construction in CO2 storage projects, using widely available industrial byproducts.
🏛政策担当者:Supports circular economy policies by showing that coal combustion residues can enhance CCS infrastructure durability.
📄 Abstract（原文）
High Resolution Image Download MS PowerPoint Slide This study investigates the effects of coal fly ash (CFA) and CFA-derived zeolite incorporation on the hydration behavior, microstructural evolution, and mechanical performance of oilwell cement pastes under CO 2 -rich conditions relevant to carbon capture and storage (CCS) applications. CFA and CFA-derived zeolite were incorporated into Class G oil well cement, either individually or as hybrid blends, and evaluated before and after exposure to CO 2 -saturated water at 90 °C and 15 MPa for 14 days. The investigated formulations comprised cement pastes with 10 wt % CFA, 10 wt % zeolite, and two combined systems (5Z10CFA and 10Z5CFA), which were compared with a reference paste. Solid-state NMR ( 27 Al and 29 Si), FTIR, TGA, and XRD analyses confirmed the pozzolanic activity of the supplementary cementitious materials through portlandite consumption, increased amorphous phase content, and enhanced C–S–H and C–A–S–H formation. The 29 Si NMR results revealed increased C–S–H polymerization and chain length in blended systems. The 27 Al NMR spectra showed a marked increase in tetrahedrally coordinated Al incorporated into the gel structure. Carbonation resistance was comparable across all systems, while compressive strength was maintained or improved after CO 2 exposure, especially in CFA-containing blends. Among the investigated formulations, the 5Z10CFA blend exhibited the most favorable combination of reactivity, microstructural refinement, and mechanical performance. The results confirmed that the combined use of CFA and CFA-derived zeolite in oil well cement systems is effective incontributing to enhanced durability in CO 2 -rich environments while promoting the circular use of industrial byproducts.
🔗 Provenance — このレコードを発見したソース
- openalex https://doi.org/10.1021/acs.energyfuels.6c02231first seen 2026-07-09 05:16:41
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