含基合微孔聚合物,包括3D三角烯,用于选择性捕获N2和CH4以上的CO2和CH4
Mosim Ansari1, Aamir Hanif1, Mahmoud M Abdelnaby1
1Interdisciplinary Research Center for Hydrogen Technologies and Carbon Management (IRC-HTCM), King Fahd University of Petroleum & Minerals, Dhahran 31261, Saudi Arabia.
ACS omega
|February 3, 2025
概括
一种新的基功能化三基聚合物 (TBPP-OH) 通过物理吸附证明了高效的二氧化碳 (CO2) 捕获. 这种材料具有很高的选择性和容量,为传统的基于氨基的二氧化碳去除方法提供了有希望的替代方案.
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:
- 大气中二氧化碳度的上升推动了全球变暖,需要先进的碳捕获技术.
- 氨基基溶剂虽然常用于二氧化碳捕获,但受到降解,腐蚀和高再生能源需求的影响.
- 微孔吸附剂为物理二氧化碳吸附提供了一种高效和选择性的替代品.
研究的目的:
- 合成一种含有3D-三素的新型超交联微孔聚合物 (TBPP-OH) 与基组.
- 评估合成聚合物的二氧化碳吸附能力,选择性和稳定性.
- 用吸附模型研究二氧化碳吸附机制.
主要方法:
- 简单的一合成TBPP-OH,一个基于三基的微孔聚合物.
- 关于微性,表面积 (BET) 和热稳定性 (Td,炭收益率) 的TBPP-OH的表征.
- 为了确定吸附能力和选择性,在273K和1bar下测量了CO2,N2和CH4吸附/脱附等温体. 朗迈尔和双位点朗迈尔模型被用于分析吸附机制.
主要成果:
- TBPP-OH表现出显著的微孔性 (70%Vmic),高的BET表面积 (838 m2 g-1),以及出色的热稳定性 (Td = 372 °C,煤炭产量> 60%).
- 该聚合物对二氧化碳具有强烈的亲和力 (Qst = 32.9 kJ/mol),其二氧化碳吸附能力高达2.77 mmol/g,温度为273 K,1 bar.
- 观察到高选择性对CO2超过N2和CH4,表明有效的CO2分离的潜力.
结论:
- 合成的TBPP-OH因其高表面积,微孔性,热稳定性和二氧化碳亲和力而成为捕获二氧化碳的有希望的吸附剂.
- 三基单元有助于聚合物的理想性质,以有效吸附二氧化碳.
- TBPP-OH为传统的二氧化碳捕获方法提供了可行的替代方案,在气体分离和碳管理方面具有潜在的应用.
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