From Waste to Value: Conversion of Calcium Sulfate to Vaterite via Carbon Capture and Storage
廃棄物から価値へ：炭素回収・貯留による硫酸カルシウムのバテライトへの変換 (AI 翻訳)
Carlos Pimentel, German Montes-Hernandez, Pablo Almarza‐Cifuentes, M. Kellermeier, A. V. Van Driessche
🤖 gxceed AI 要約
日本語
本研究は、工業副産物である石膏（硫酸カルシウム）を炭酸カルシウム（バテライト）に変換する新たなCCUS技術を提案。常温常圧での簡便なプロセスで、高比表面積を持つバテライト粒子を生成し、これをセメント代替材料として利用可能であることを示した。CO2固定化と廃棄物有効活用の両立を実現する有望な手法である。
English
This study presents a novel CCUS method converting gypsum (calcium sulfate), an industrial byproduct, into vaterite (calcium carbonate) via carbonation under ambient conditions. The resulting particles have high surface area and can be used as a construction material, demonstrating rapid strength development comparable to conventional cement. The approach offers a dual benefit of CO2 sequestration and waste valorization.
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、産業廃棄物である石膏の処理やCCUS技術の社会実装が課題となっている。本手法は低コスト・常温常圧での運用が可能であり、日本の循環型社会形成やカーボンニュートラル政策に貢献する可能性がある。
In the global GX context
Globally, CCUS is critical for achieving net-zero emissions. This research provides a low-energy, scalable method for CO2 utilization using abundant industrial waste, offering a pathway for hard-to-abate sectors like cement and waste management to reduce emissions and create valuable products.
👥 読者別の含意
🔬研究者:Provides mechanistic insights into carbonation of calcium sulfate and demonstrates a new route for vaterite synthesis without additives.
🏢実務担当者:Potential for waste gypsum valorization and production of low-carbon construction materials; requires further scale-up validation.
🏛政策担当者:Supports policies promoting CCUS and circular economy by showing a cost-effective CO2 utilization technology with value-added output.
📄 Abstract（原文）
Developing effective solutions to reduce carbon dioxide emissions into the atmosphere is crucial for mitigating climate change. While various methods for CO2 capture and storage exist, many of the proposed approaches are not yet economically viable on larger scales. Here we introduce a new sustainable strategy for carbon management that relies on the carbonation of calcium sulfate, an abundant byproduct of various industrial processes. Through in‐situ observation tools, we uncover the carbonation mechanism and demonstrate that phase‐pure vaterite (a metastable form of calcium carbonate) can be obtained without additives via straightforward conversion of gypsum powder in water at ambient conditions. The resulting particles exhibit interesting properties such as high specific surface area and reactivity. To demonstrate the value of the products for real‐life applications, the obtained vaterite was tested as a raw material for construction. Upon mixing with water, the spherical vaterite particles transformed into aragonite crystals through a dissolution‐reprecipitation pathway, which was accompanied by rapid compressive strength development on a level comparable to that of conventional cements. Our findings constitute an important first step toward repurposing gypsum waste as a sink for carbon dioxide and source to produce materials with reduced environmental impact.
🔗 Provenance — このレコードを発見したソース
- semanticscholar https://doi.org/10.1002/adfm.202519977first seen 2026-05-05 23:38:51
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