将煤灰转化为气候解决方案:用于具有成本效益和超负值CO2排放的ALOOH支持的固体氨基吸收剂
Xuehua Shen1,2, Ruirui Zhang1, Xinyu Ai1
1State Key Laboratory of Soil Pollution Control and Safety, School of Environmental Science and Engineering, Southern University of Science and Technology, Shenzhen 518055, China.
Environmental science & technology
|October 23, 2025
概括
一种新型的固体氨基吸附剂PEI@AlOOH,从煤炭飞灰中合成,为碳捕获提供了一个具有成本效益的解决方案. 这种材料具有很高的二氧化碳吸附能力和出色的稳定性,大大降低了捕获成本和环境影响.
科学领域:
- 材料科学 材料科学 材料科学
- 环境科学 环境科学
- 化学工程是化学工程的重要组成部分.
背景情况:
- 固体氨基吸附剂对于碳捕获至关重要,但在成本和制造方面面临挑战.
- 现有的方法往往导致附带的二氧化碳排放和环境问题.
- 开发可持续和经济的吸附剂对于实现负排放至关重要.
研究的目的:
- 开发一种成本高效,环保的固体氨基吸收剂,用于二氧化碳捕获.
- 用煤灰作为前体合成一种新型吸附剂.
- 评估开发的吸附剂的二氧化碳吸附性能,稳定性和生命周期影响.
主要方法:
- 从煤炭飞灰中回收,使用石灰石-苏打烧结方法.
- 合成具有高孔性的氧化 (AlOOH) 支体.
- 在AlOOH支上浸聚乙烯胺 (PEI),以创建PEI@AlOOH.
- 评估二氧化碳吸附能力,尿素抗性和循环稳定性.
- 生命周期评估 (LCA) 用于碳足迹和成本分析.
主要成果:
- 高提取效率 (98%) 和高孔积 (1.68 cm3·g-1) 的AlOOH支持.
- PEI@AlOOH实现了178毫克·g-1.1的二氧化碳吸附能力.
- 特殊的尿素抗性和循环稳定性,在30个循环中性能下降仅为4.11%.
- 生命周期评估表明碳足迹低 (190.4公斤CO2/) 和捕获成本低 (252/).
结论:
- PEI@AlOOH是一种高效和经济的固体氨基吸收剂,用于捕获二氧化碳,来自废物.
- 煤炭飞灰的简化合成和使用有助于其低成本和环境效益.
- 吸附剂的性能和稳定性表明,对于大规模的碳捕获应用,具有重要的工业潜力.
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