建築材料は年間160億トン以上のCO2を貯蔵できる
Elisabeth Van Roijen1, Sabbie A Miller1, Steven J Davis2
1Department of Civil and Environmental Engineering, University of California, Davis, CA, USA.
Science (New York, N.Y.)
|January 9, 2025
まとめ
建築材料は大量の二酸化炭素 (CO2) を貯蔵することができる. 従来の材料を CO2 貯蔵用代替材料に置き換えれば,年間排出量の50%を削減し,純ゼロの目標を達成できます.
科学分野:
- 環境科学
- 材料科学
- 気候変動の緩和
背景:
- 排出量ゼロを達成するには,排出量削減と二酸化炭素 (CO) の除去の両方が必要です.
- 炭素の吸収と貯蔵 (CCS) は気候変動の緩和に不可欠です.
研究 の 目的:
- 建築材料内の年間CO2貯蔵の可能性を定量化する.
- 建築材料を炭素吸収器として使用する可能性を評価する.
主な方法:
- 代替建築材料のCO2貯蔵容量の分析
- インフラ開発のスケールに基づいて,潜在的なCO2の封じ込めをモデル化する.
主要な成果:
- 新しいインフラストラクチャで従来の建材を CO2 貯蔵用代替材料に置き換えれば,年間最大166 ±28億トンの CO2 を吸収できます.
- この可能性は2021年の世界のCO2排出量の約50%を占めています.
- 貯蔵の可能性は,質量単位あたりの炭素含有量よりも,材料の使用量に依存しています.
結論:
- 建築材料は,CO2の貯蔵に相当する貯蔵庫を提供し,気候変動の緩和に貢献します.
- 建築材料の需要が増えることで 炭素の貯蔵容量が自然に増加します
- CO2を貯蔵するために建築材料を使用すると,地質的,地上,または海洋的な貯蔵方法のようなより高価なまたは危険な貯蔵方法への依存を減らすことができます.
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