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解读CO2在纤维素和酸盐气凝中的原子尺度吸附机制

Daniel Pereira¹, Mirtha A O Lourenço¹, Mariana Sardo¹

¹CICECO - Aveiro Institute of Materials, Department of Chemistry, University of Aveiro, 3810-193 Aveiro, Portugal.

ACS applied polymer materials

|October 16, 2025

概括

生物聚合物气凝通过物理吸收和化学吸收捕获二氧化碳 (CO2). 了解表面化学,如氨基密度,是优化这些二氧化碳吸附剂的关键气候解决方案.

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:

生物聚合物气凝是用于二氧化碳捕获的经济高效和可持续材料.
这些材料中二氧化碳吸附的精确机制尚未完全理解.
阐明这些机制对于设计高效的二氧化碳吸附剂至关重要.

研究的目的:

为了研究纤维素和基托气凝中的二氧化碳吸附机制.
了解表面化学,特别是氨基密度在二氧化碳捕获中的作用.
为优化基于生物聚合物的二氧化碳吸附剂提供原子层面的见解.

主要方法:

固态核磁共振 (ssNMR) 光谱分析吸附物种和动态.
密度函数理论 (DFT) 建模以支持实验观测和识别吸附物种.
系统地改变基托气凝中的氨基密度,以研究其对二氧化碳吸附的影响.

主要成果:

纤维素气凝仅通过物理吸收吸附二氧化碳.
酸盐气凝表现出物理吸收和化学吸收,形成碳酸和碳酸盐.
在两种气凝中确定了三种不同的物理吸收CO2状态 (固体,液体,气态).
混合气凝中氨酸密度降低抑制了氨基碳酸盐的形成,隔离了碳酸盐酸.

结论:

表面功能组和氨基密度对生物聚合物气凝中的二氧化碳吸附途径产生了关键影响.
对结构功能关系的原子层次理解有助于设计改进的二氧化碳捕获材料.
这项研究有助于开发基于生物聚合物的先进吸附剂,以实现有效的碳捕获技术.

关键词:

二氧化碳吸附方式在 DFT 方面,它是最重要的.气凝是一种气凝.聚糖类是一种多糖类.有孔的材料是多孔的材料.固态NMR是一种固态NMR.

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