Laboratory Synthesis of Limestone for CO2 Capture and Removal: A Review of Ca-Based Mineral Carbonation
CO2回収・除去のための石灰石の実験室合成：カルシウム系鉱物炭酸化のレビュー (AI 翻訳)
Seungyeol Lee
🤖 gxceed AI 要約
日本語
本レビューは、カルシウム系鉱物炭酸化によるCO2の永久固定（人工石灰石合成）の最新研究を包括的に整理。天然鉱物と産業副産物の原料比較、直接・間接反応経路、転換率・エネルギー消費・CaCO3多形制御、技術経済性・環境評価、大規模展開の課題を論じる。大気CO2除去（CDR）としての位置づけとCCS/CCUとの差異も明確化。
English
This review consolidates advances in ex situ Ca-based mineral carbonation for permanent CO2 storage as engineered limestone. It compares feedstocks (Ca-silicates vs. industrial residues), direct/indirect routes, conversion efficiency, energy demand, and polymorph control. Techno-economic and environmental assessments and gigaton-scale challenges are summarized, clarifying the distinction between CDR (using atmospheric/biogenic CO2) and CCS/CCU.
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
日本はCCUS・カーボンリサイクルを戦略技術に位置づけており、鉱物炭酸化はセメント・鉄鋼など排出源直近での活用や、DACとの組み合わせが有望視される。本レビューは基礎・応用の両面を俯瞰し、実証・事業化の基盤となる。
In the global GX context
Mineral carbonation is gaining traction globally as a durable CDR method, particularly for hard-to-abate sectors. This review provides a systematic reference for researchers and developers working on direct air capture integration, industrial residue valorization, and scalable reactor design, bridging geochemistry and engineering.
👥 読者別の含意
🔬研究者:A comprehensive framework for understanding Ca-based mineral carbonation, including material selection, reaction pathways, and performance metrics, useful for advancing CDR research.
🏢実務担当者:Offers insights into feedstock options (e.g., steel slag, cement waste) and process conditions for companies exploring carbonation-based carbon removal or utilization.
🏛政策担当者:Summarizes the current state and challenges of mineral carbonation as a CDR technology, informing policies on carbon removal credits, R&D funding, and infrastructure planning.
📄 Abstract（原文）
Mineral carbonation offers a thermodynamically stable, permanent route for immobilizing CO2 as solid carbonate minerals. Whether it constitutes genuine carbon dioxide removal (CDR) depends on the carbon source: net atmospheric removal requires CO2 captured from air (e.g., by direct air capture) or biogenic sources and then durably stored, whereas mineralization of fossil-derived industrial CO2 is better classed as carbon capture and storage or utilization (CCS/CCU). Calcium-bearing silicates and Ca-rich industrial residues are attractive feedstocks because their reaction with CO2 yields calcium carbonate (CaCO3), the mineral of natural limestone. In nature, Ca-silicate weathering and CaCO3 precipitation buffer Earth’s climate over millennia; engineered Ca-based carbonation seeks to reproduce this limestone-forming cycle in reactors orders of magnitude faster, enabling permanent storage on practical timescales. This review consolidates recent advances in ex situ Ca-based mineral carbonation under a unified framework in which the synthesis of “engineered limestone” is the central objective. It outlines the geochemical basis and its engineering translation, compares Ca-silicates and Ca-rich residues as feedstocks, and surveys direct and indirect routes, emphasizing conversion, energy demand, and control of CaCO3 polymorph and morphology. Techno-economic and environmental assessments, demonstrations, and challenges to gigatonne-scale deployment are summarized, offering a reference for next-generation Ca-based CDR research.
🔗 Provenance — このレコードを発見したソース
- semanticscholar https://www.mdpi.com/2075-163X/16/7/679/pdf?version=1782635092first seen 2026-07-04 05:29:38
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