用于缓解膜淡化过程中的化剂:分子结构和膜工艺对分子结构的影响
Yiqun Yao1, Xijia Ge1, Yiming Yin1
1Department of Civil and Environmental Engineering, Colorado State University, Fort Collins, CO 80523, United States.
Water research
|October 14, 2023
概括
在膜海水淡化中有效的二氧化尺度控制需要量身定制的抗剂. 这项研究表明,抗缩剂的性能在静态测试和动态膜过程 (如膜蒸和反透) 之间有所不同.
科学领域:
- 材料科学 材料科学 材料科学
- 化学工程是化学工程的重要组成部分.
- 环境科学 环境科学
背景情况:
- 缩显著影响膜海水淡化效率.
- 现有的抗缩剂由于其独特的聚合机制,对缩无效.
- 开发针对二氧化的专门抗剂对于海水淡化性能至关重要.
研究的目的:
- 在膜蒸 (MD) 和反透 (RO) 中系统地研究和比较用于缓解缩的抗缩剂.
- 了解抗剂功能组和分子重量对聚合物和膜性能的影响.
- 阐明抗剂与二氧化尺度相互作用的机制.
主要方法:
- 静态实验,以评估抗剂抑制酸聚合的稳定性.
- 在MD和RO系统中进行动态交叉流体实验,以评估水流量下降.
- 通过键对岩层形态和抗岩剂相互作用的分析.
主要成果:
- 具有强键受体/捐赠体的抗缩剂阻碍了聚合,其效率取决于功能和重量.
- 聚乙烯甘醇 (PEG) 显示出高静态效率,但动态性能有限.
- 聚乙烯糖醇) 胺 (PEGD) 有效抑制了MD和RO的聚合,并减少了MD和RO的流量下降.
- 聚乙烯胺 (PEI) 和聚胺胺 (PAMAM) 延长了MD的水回收,但加剧了RO流量下降.
- 抗剂的存在改变了通过结合的二氧化形态.
结论:
- 在静态和动态膜过实验中,抗缩剂的有效性显著不同.
- 选择抗剂必须考虑特定的膜工艺 (MD与RO) 和缩机制.
- 这项研究为设计有效的抗剂提供了关键的见解,这些抗剂是针对淡化过程中化的.
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