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合成和描述先进的Ad-UiO-66@NGO复合物,以高效地捕获CO2和提高CO2吸附选择性

Keywan Azizi¹, Shahrokh Shahhosseini¹, Heidar Javdani Esfahani¹

¹School of Chemical, Petroleum and Gas Engineering, Iran University of Science and Technology, Tehran, Iran.

Environmental research

|January 12, 2025

概括

这项研究开发了一种用于增强碳捕获的新型复合吸附剂,实现了二氧化碳吸收增加48%和高CO2/N2选择性. 该材料在55个循环中表现出极好的可再生性,这对于工业应用至关重要.

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:

有效的吸附剂对于工业烟气中的碳捕获和利用 (CCU) 至关重要,以减少温室气体排放.
基于的金属有机框架 (MOF) 和石墨烯氧化物 (GO) 是气体吸附的有希望的材料.

研究的目的:

通过将缺陷的基MOF与胺基功能化石墨烯氧化物结合起来,合成先进的复合吸附剂.
为提高工业烟气应用的二氧化碳吸附能力和二氧化碳2/N2分离选择性.

主要方法:

有缺陷的UiO-66/NGO复合材料的溶热合成.
使用XRD,FT-IR,TGA,FE-SEM和吸附 - 溶解分析进行表征.
在各种温度和压力 (1-9 bar) 下测量CO2和N2的气体吸收量.

主要成果:

优化的氨基缺陷UiO-66/NGO复合物 (15重%氨基改性GO) 在298K和9bar时的CO2吸收率为15.13mmol/g,比原始MOF提高48%.
与弗洛伊德利希 (R2=0.998) 和埃洛维奇 (R2=0.973) 模型对等热和动力数据的高度一致.
异常的CO2/N2选择性为148,在55个循环后保持了超过81.50%的CO2吸附可逆性.

结论:

开发的有缺陷的UiO-66/NGO复合物是一种高效的吸收剂,用于捕获二氧化碳,具有优越的选择性和可再生性.
这种先进材料显示了工业CCU应用的巨大潜力,有助于减少温室气体排放.

关键词:

氨基化石墨烯氧化物.氨基酸有缺陷的MOF.碳二氧化碳 (CO2) 吸附方式 CO(2)/N(2) IAST 的选择性

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