Evaluation of piperazine/MIL-101 sorbents for enhanced low-temperature CO2 removal

IF 2.5 4区材料科学 Q2 CHEMISTRY, APPLIED

Journal of Porous Materials Pub Date : 2023-08-31 DOI:10.1007/s10934-023-01512-5

Rachatawan Yaisamlee, Feysal M. Ali, Mohanned Mohamedali, Hussameldin Ibrahim

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Abstract

In the present work, the metal-organic framework MIL-101(Cr) was modified by grafting with piperazine (Pz) in order to enhance the low-temperature CO₂ adsorption characteristics. The effect of piperazine loading was studied by varying the percentage of piperazine (0%, 20%, 50%, and 80%). The adsorbent materials were characterized by X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FTIR), N₂ adsorption-desorption, and thermogravimetric analysis (TGA). The characterization studies confirmed the successful incorporation of piperazine on MIL-101. The CO₂ adsorption kinetics and adsorption isotherms model were investigated at three different temperatures (30 °C, 40 °C, and 50 °C) to better understand the behavior of CO₂ adsorption on the synthesized adsorbents. It was found that 50%pz/MIL-101 can enhance CO₂ capacity up to 67% compared to bare MIL-101. Furthermore, piperazine grafted on MIL-101 can increase the rate constant and improve the binding energy between CO₂ molecules and the surface of adsorbents. The regenerability for CO₂ adsorption of pz/MIL-101 had nearly no drop after eight adsorption-desorption cycles. Thus, the pz/MIL-101 provides an excellent opportunity to capture CO₂ in industrial applications.

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哌嗪/MIL-101吸附剂增强低温CO2脱除效果的评价

本研究通过接枝哌嗪（Pz）对金属有机框架 MIL-101(Cr)进行改性，以增强其低温二氧化碳吸附特性。通过改变哌嗪的百分比（0%、20%、50% 和 80%）研究了哌嗪负载的影响。通过 X 射线衍射 (XRD)、傅立叶变换红外光谱 (FTIR)、N2 吸附-解吸和热重分析 (TGA) 对吸附剂材料进行了表征。表征研究证实 MIL-101 成功加入了哌嗪。为了更好地了解合成吸附剂对 CO2 的吸附行为，研究了三种不同温度（30 °C、40 °C、50 °C）下 CO2 的吸附动力学和吸附等温线模型。结果发现，与裸露的 MIL-101 相比，50%pz/MIL-101 可将 CO2 容量提高 67%。此外，接枝在 MIL-101 上的哌嗪可以增加速率常数，提高二氧化碳分子与吸附剂表面的结合能。经过八个吸附-解吸循环后，pz/MIL-101 吸附二氧化碳的再生能力几乎没有下降。因此，pz/MIL-101 为工业应用中捕获二氧化碳提供了绝佳的机会。

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来源期刊

Journal of Porous Materials 工程技术-材料科学：综合

CiteScore

4.80

自引率

7.70%

发文量

203

审稿时长

2.6 months

期刊介绍： The Journal of Porous Materials is an interdisciplinary and international periodical devoted to all types of porous materials. Its aim is the rapid publication of high quality, peer-reviewed papers focused on the synthesis, processing, characterization and property evaluation of all porous materials. The objective is to establish a unique journal that will serve as a principal means of communication for the growing interdisciplinary field of porous materials. Porous materials include microporous materials with 50 nm pores. Examples of microporous materials are natural and synthetic molecular sieves, cationic and anionic clays, pillared clays, tobermorites, pillared Zr and Ti phosphates, spherosilicates, carbons, porous polymers, xerogels, etc. Mesoporous materials include synthetic molecular sieves, xerogels, aerogels, glasses, glass ceramics, porous polymers, etc.; while macroporous materials include ceramics, glass ceramics, porous polymers, aerogels, cement, etc. The porous materials can be crystalline, semicrystalline or noncrystalline, or combinations thereof. They can also be either organic, inorganic, or their composites. The overall objective of the journal is the establishment of one main forum covering the basic and applied aspects of all porous materials.