使用表面活性剂辅助的NaClO-NaOH系统去硫煤的作用和机制
Fei Gao1,2, Yunming Zhang3,4
1School of Safety Science and Engineering, Liaoning Technical University, Huludao, 125100, China. gfgf2001@163.com.
Scientific reports
|February 11, 2025
概括
表面活性剂通过改善可湿性和增强反应剂相互作用来促进煤炭在NaClO-NaOH中的脱硫. 富含氧的表面活性剂,如AEC-9Na,通过增加与硫化合物的反应性来表现出卓越的性能.
科学领域:
- 煤炭化学 煤炭的化学
- 表面科学是一门科学.
- 氧化过程中的氧化过程.
背景情况:
- 煤炭含有硫化合物,导致环境污染.
- 使用低化 (NaClO) 和氧化 (NaOH) 的氧化脱硫是一种有前途的方法.
- 表面活性剂可能会提高煤炭脱硫的效率.
研究的目的:
- 研究表面活性剂对纳克洛-NaOH系统中煤炭脱硫的作用和机制.
- 分析表面活性剂如何影响煤炭的湿透性,静电潜力和脱硫过程中的化学结合.
- 确定与提高脱硫性能相关的关键表面活性物质特性.
主要方法:
- 对五种不同的表面活性剂对煤炭脱硫速度,可湿性,静电潜力和化学结合的影响进行实验分析.
- 理论计算以探索表面活性剂辅助脱硫的微观机制.
- 分析表面活性剂结构 (含氧的功能组) 和脱硫效率之间的相关性.
主要成果:
- 所有测试的表面活性剂都提高了煤炭脱硫率和改善了可湿性.
- 湿度的提高与脱硫的有效性相关,但不是唯一的因素.
- 含有更多氧的功能组的表面活性剂表现出更好的脱硫性能,其中AEC-9Na是最有效的.
- 表面活性剂改变了静电电位并影响了键长 (Cl-O,S-H,S-C),增加了ClO−与硫化合物的反应性.
结论:
- 表面活性剂在NaClO-NaOH系统中显著增强了煤氧化脱硫.
- 该机制涉及由于表面活性剂诱导的电子效应而提高了氧化剂的湿透性和反应性.
- 表面活性剂的分子结构,特别是含有氧的功能群的丰富性,对于优化脱硫效率至关重要.
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