Investigation on a single-step integrated CO2 absorption-mineralization process of Ca-rich purified dust coupled with binary amine mixed solution at low temperature
发布时间：2025-10-16
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- 发布时间：
- 2025-10-16
- 论文名称：
- Investigation on a single-step integrated CO2 absorption-mineralization process of Ca-rich purified dust coupled with binary amine mixed solution at low temperature
- 发表刊物：
- SEPARATION AND PURIFICATION TECHNOLOGY
- 摘要：
- The integrated CO2 absorption-mineralization (IAM) process has been recognized as one of the most promising carbon capture technologies, but its reaction pathway and process stability for any one alkaline solid waste still worthy to be studied. This work mainly explored the effects of binary amine solvent mixing ratio, reaction time and ash dosage on a single-step IAM process of Ca-rich purified dust (PD), and to evaluate the cyclic performance of this process. The results showed that the amine mixed solution composed of 1.5 mol/L monoethanolamine (MEA) and 1.5 mol/L dimethylethanolamine (DMEA), performed well in terms of liquid-based CO2 loading (0.933 mol/L), CO2 sequestration capacity (246.21 g/kg), and CO2 mineralization efficiency (35.97 %). All the mineralized products existed as calcite CaCO3 in the single MEA or DMEA solution with 3 mol/L, while the formation of metastable vaterite CaCO3 was more favoured in the MEA-DMEA binary amine. The vaterite CaCO3 started to be formed in mineralized products after single-step IAM process lasted for 40 min at the optimal amine ratio. In-situ regeneration and reusing of MEA-DMEA solvents were proved to be feasible. In comparison with fresh solvent, CO2 sequestration capacity of PD in recycled solvent was reduced by about 26.03 % at the fifth cycle under same mineralization condition.
- 合写作者：
- Wang Yibin, Liu Yanjie, Yin Tianming, Feng Jingwu, Lin Chi, Tan Houzhang
- 卷号：
- 368
- 是否译文：
- 否
- 发表时间：
- 2025-09-17