来自高炉渣的半孔二氧化胺珠,用于CO2捕获应用
Baljeet Singh1, Marianna Kemell1, Juho Yliniemi2
1Department of Chemistry, University of Helsinki, FI-00014 Helsinki, Finland. baljeet.singh@helsinki.fi.
Nanoscale
|August 15, 2024
概括
钢是一种低成本的来源,可以产生半孔. 这种与聚乙烯胺 (PEI) 功能化的二氧化在许多循环中有效捕获二氧化碳 (CO2).
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:
- 钢是一种丰富的,低成本的工业副产品,富含.
- 开发用于二氧化碳 (CO2) 捕获的具有成本效益的材料对于环境可持续性至关重要.
- 半孔二氧化具有较大的表面积,因此适合于吸附应用.
研究的目的:
- 开发一种可持续的方法,从钢中生产半孔.
- 合成和描述高炉渣 (BFS) 中产生的半孔二氧化.
- 用聚乙烯胺 (PEI) 功能化二氧化,以实现高效的二氧化碳捕获.
主要方法:
- 一个两阶段的溶解-沉过程,使用盐酸 (HCl) 和氧化 (NaOH) 来从BFS中提取二氧化.
- 从提取的酸盐中合成半孔.
- 在75°C以15%的CO2/N2混合物进行循环CO2吸附-脱附测试时形成-PEI珠.
主要成果:
- 从BFS获得了100m2g-1表面积和4-20nm孔径的纯.
- 石-PEI珠子的平均二氧化碳捕获能力为1 mmol g-1.
- 该材料在105个吸附-脱吸周期中保持了性能.
结论:
- 钢是一种可行的和可持续的前体,用于生产具有成本效益的半孔.
- 合成的-PEI材料对实际和循环的二氧化碳捕获应用具有前景.
- 这种方法有助于废物利用,并提高碳捕获技术的可行性.
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