由脂肪酸修饰的煤灰衍生地石NaP1的表面基本性和水友性
Ana-Paola Beltrão-Nunes1,2, Marçal Pires2, René Roy1
1Nanoqam, Department of Chemistry, University of Quebec at Montreal, Montreal, QC H3C 3P8, Canada.
Molecules (Basel, Switzerland)
|February 24, 2024
概括
煤炭飞灰衍生的焦化物NaP1的脂肪酸修饰增强了二氧化碳 (CO2) 的捕获. 加入棕酸显著增加了二氧化碳的保留,为可逆二氧化碳捕获应用提供了一个有希望的策略.
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:
- 煤炭飞灰是合成热石的潜在来源.
- 热质石在气体吸附应用方面受到广泛研究.
- 修改化物可以调整它们的吸附性质.
研究的目的:
- 为了研究二氧化碳捕获性能,改性煤飞灰衍生的化物.
- 探索氨基和脂肪酸修饰对热酸NaP1.1的影响.
- 为了确定增强可逆二氧化碳捕获的最佳条件.
主要方法:
- 从煤炭飞灰中合成地质石.
- 用四种不同的氨基酸对热酸NaP1进行修改.
- 用三种不同的脂肪酸加载酸NaP1.
- 使用二氧化碳和二氧化热编程脱 (TPD),红外光谱 (IR),N2吸附-脱和扫描电子显微镜 (SEM) 的表征.
主要成果:
- 在氨基修饰后,酸NaP1对二氧化碳的亲和力是最高的.
- 在NaP1中加入棕酸 (PA) 显著增加了二氧化碳保留能力 (CRC) 并降低了二氧化碳脱吸温度.
- 酸盐的有益作用归因于基本Na+-palmitate盐的形成,遮蔽了表面的酸性.
- 氨基/脂肪酸组合显示出一种矛盾的减轻PA效应.
结论:
- 添加脂肪酸,特别是棕酸,是一种有效的策略,可以通过使用酸NaP1.1来增强可逆CO2捕获.
- 修改战略为开发高效的二氧化碳吸附剂提供了一个有前途的途径.
- 了解表面相互作用是优化二氧化碳捕获性能的关键.
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