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稳定可重复使用的纳米纤维素气凝与氨基组修改在吸附/脱附周期的CO2捕获₂

Fabiola Valdebenito^1,2, Camila Albornoz¹, Valentina Rivera¹

¹Departamento de Química Ambiental, Universidad Católica de la Santísima Concepción, Concepción 4070129, Chile.

Materials (Basel, Switzerland)

|January 25, 2025

概括

氨基功能化纳米纤维素气凝显示出出色的稳定性和可用于二氧化碳 (CO2) 捕获的可重复使用性. 这些材料在20个循环中保持高的二氧化碳脱吸,这表明工业碳捕获和储存的潜力.

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:

开发稳定且可重复使用的吸附剂对于有效的二氧化碳 (CO2) 捕获至关重要.
纳米纤维素气凝为功能化提供了一个有希望的多孔支架.
氨基功能化通过化学吸收增强了二氧化碳的亲和力.

研究的目的:

为了评估氨基功能化纳米纤维素气凝对二氧化碳吸附的稳定性和可重复使用性.
为了研究氨基群负荷对二氧化碳吸附能力的影响.
评估这些气凝对于大规模碳捕获和储存 (CCS) 技术的潜力.

主要方法:

用N-[3-(trimethoxysilyl) propyl]乙烯胺 (DAMO) 修改的纳米纤维素气凝通过化进行合成.
使用热重力测量分析 (TGA) 进行热稳定性分析.
使用吸附异热和在298K和4bar的衰变压力技术评估CO2吸附性能.

主要成果:

修改后的气凝显示出高达250°C的优异热稳定性.
二氧化碳吸附能力与氨基群负荷成比例增加,达到高达7.86 mmol的二氧化碳g-1聚合物.
在20个吸附/脱附周期中,气凝在环境温度下保持了95%的CO2脱附效率.

结论:

氨基功能化纳米纤维素气凝是稳定且可重复使用的二氧化碳吸附剂.
化学吸收机制和高氨基群负载有助于有效的二氧化碳捕获.
这些材料在碳捕获和储存技术中的工业应用具有显著的潜力.

关键词:

捕获二氧化碳的方法氨基荷载的氨基荷载.纳米纤维素气凝是一种纳米纤维素气凝.

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