Cross-scale indirect CO
- 1Jiangsu Key Laboratory of Materials and Technologies for Carbon Cycling, School of Sustainable Energy and Resources, Nanjing University, Suzhou, Jiangsu, 215163, China
- 2School of Earth Sciences and Engineering, Nanjing University, Nanjing, Jiangsu, 210093, China
Abstract
Indirect CO 2 mineralization of Fe-rich serpentinite tailings was evaluated by connecting ammonium sulfate-assisted activation, Mg-Fe separation, carbonate precipitation and salt crystallization across laboratory, engineering and pilot scales. Under the selected activation conditions, 52.08% of the feed Mg was mobilized, and most dissolved Mg was preserved during NH 3 -assisted purification. Hydrated Mg-carbonate formation was supported by XRD and SEM-EDS, and an ammonium sulfate-containing crystalline stream was recovered downstream. Approximately 92% of the mean laboratory Mg-leaching performance was retained on the 1.6 kg/h engineering line. An independent 125 kg/batch pilot campaign was operated for 72 h using cleaned boiler flue gas. Constraints in kiln operation, solids separation and crystallization were identified during scale transfer. Unit-basis screening calculations were used to examine the sensitivity to evaporation demand and fresh-reagent supply. Cross-scale process connectivity was demonstrated, while Mg-based capacities were treated as conditional inventory estimates. Actual carbonate-carbon retention, repeated reagent reuse and net climate benefit were not established by the available measurements.
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BibTeX
@article{hu2026crossscale,
title = {{Cross-scale indirect CO}},
author = {Yue Hu and Liang Zhao and Jingqi Zhao and Han Hao and Chen Zhu and Jun Chen},
journal = {Carbon Capture Science \& Technology},
year = {2026},
month = nov,
doi = {10.1016/j.ccst.2026.100714},
url = {https://doi.org/10.1016/j.ccst.2026.100714},
note = {CC BY},
}
RIS
TY - JOUR
TI - Cross-scale indirect CO
AU - Yue Hu
AU - Liang Zhao
AU - Jingqi Zhao
AU - Han Hao
AU - Chen Zhu
AU - Jun Chen
PY - 2026
DA - 2026/11/04
JO - Carbon Capture Science & Technology
DO - 10.1016/j.ccst.2026.100714
UR - https://doi.org/10.1016/j.ccst.2026.100714
AB - Indirect CO 2 mineralization of Fe-rich serpentinite tailings was evaluated by connecting ammonium sulfate-assisted activation, Mg-Fe separation, carbonate precipitation and salt crystallization across laboratory, engineering and pilot scales. Under the selected activation conditions, 52.08% of the feed Mg was mobilized, and most dissolved Mg was preserved during NH 3 -assisted purification. Hydrated Mg-carbonate formation was supported by XRD and SEM-EDS, and an ammonium sulfate-containing crystalline stream was recovered downstream. Approximately 92% of the mean laboratory Mg-leaching performance was retained on the 1.6 kg/h engineering line. An independent 125 kg/batch pilot campaign was operated for 72 h using cleaned boiler flue gas. Constraints in kiln operation, solids separation and crystallization were identified during scale transfer. Unit-basis screening calculations were used to examine the sensitivity to evaporation demand and fresh-reagent supply. Cross-scale process connectivity was demonstrated, while Mg-based capacities were treated as conditional inventory estimates. Actual carbonate-carbon retention, repeated reagent reuse and net climate benefit were not established by the available measurements.
SN - 2772-6568
ER -