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- Title
An investigation of the global uptake of CO2 by lime from 1930 to 2020.
- Authors
Bing, Longfei; Ma, Mingjing; Liu, Lili; Wang, Jiaoyue; Niu, Le; Xi, Fengming
- Abstract
A substantial amount of CO 2 is released into the atmosphere from the process of the high-temperature decomposition of limestone to produce lime. However, during the lifecycle of lime production, the alkaline components of lime will continuously absorb CO 2 from the atmosphere during use and waste disposal. Here, we adopt an analytical model describing the carbonation process to obtain regional and global estimates of carbon uptake from 1930 to 2020 using lime lifecycle use-based material data. The results reveal that the global uptake of CO 2 by lime increased from 9.16 Mt C yr -1 (95 % confidence interval, CI: 1.84–18.76 Mt C) in 1930 to 34.84 Mt C yr -1 (95 % CI: 23.50–49.81 Mt C) in 2020. Cumulatively, approximately 1444.70 Mt C (95 % CI: 1016.24–1961.05 Mt C) was sequestered by lime produced between 1930 and 2020, corresponding to 38.83 % of the process emissions during the same period, mainly contributed from the utilization stage (76.21 % of the total uptake). We also fitted the missing lime output data of China from 1930 to 2001, thus compensating for the lack of China's lime production (cumulative 7023.30 Mt) and underestimation of its carbon uptake (467.85 Mt C) in the international data. Since 1930, lime-based materials in China have accounted for the largest proportion (about 63.95 %) of the global total. Our results provide data to support including lime carbon uptake into global carbon budgets and scientific proof for further research of the potential of lime-containing materials in carbon capture and storage. The data utilized in the present study can be accessed at 10.5281/zenodo.7896106 (Ma et al., 2023).
- Subjects
CHINA; ATMOSPHERIC carbon dioxide; CARBON sequestration; CARBON dioxide; WASTE management; CARBONATION (Chemistry)
- Publication
Earth System Science Data, 2023, Vol 15, Issue 6, p2431
- ISSN
1866-3508
- Publication type
Article
- DOI
10.5194/essd-15-2431-2023