孔隙特征对不同变形度的煤炭粘液的CO2吸附性能的影响
Xiangguo Kong1, Xi Lin1, Yuchu Cai2
1College of Safety Science and Engineering, Xi'an University of Science and Technology, Xi'an, 710054, Shaanxi, China; Key Laboratory of China Western Mine and Hazard Prevention, Ministry of Education of China, Xi'an, 710054, Shaanxi, China.
Journal of environmental management
|August 18, 2024
概括
煤炭粘液对二氧化碳 (CO2) 捕获具有很好的潜力,其微孔是主要的吸附点. 这项研究为开发有效的二氧化碳封存策略提供了基础.
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:
- 碳捕获,利用和储存 (CCUS) 技术正在迅速发展.
- 探索用于二氧化碳捕获的新型多孔碳材料至关重要.
- 煤炭粘液为二氧化碳吸附提供了一个潜在的低成本资源.
研究的目的:
- 调查使用煤炭粘液作为碳捕获二氧化碳的多孔碳材料的可行性.
- 分析不同程度变形的煤灰泥的孔隙结构和二氧化碳吸附特性.
- 为了建立煤炭粘液在二氧化碳封存中的应用的理论基础.
主要方法:
- 扫描电子显微镜 (SEM) 用于形态分析.
- 低温N2和低压CO2吸附实验,以确定孔隙结构.
- 二氧化碳异热吸附实验,以评估吸附能力和动力学.
- 兰穆尔模型适合量化吸附参数.
主要成果:
- 煤具有显著的二氧化碳吸附能力,主要是在其微孔 (<2 nm) 中.
- 微孔体积和特定表面积 (SSA) 是二氧化碳吸附的主要因素.
- 在二氧化碳吸附和微孔特性之间观察到强烈的线性相关性 (R2高达0.887).
- 兰穆尔模型显示了高的二氧化碳吸附极限,在303K时达到41.774cm3/g.
结论:
- 煤污泥是捕获二氧化碳的有希望的材料,因为它具有有利的孔隙结构和高吸附能力.
- 微孔性是煤炭粘液在二氧化碳封存中的有效性的关键.
- 这项研究支持开发高效,经济的CCUS解决方案,为环境保护和双碳目标做出贡献.
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