Güzel Kaya Gülcihan
Department of Chemical Engineering, Faculty of Engineering and Natural Sciences, Konya Technical University, Konya, Turkey.
Turk J Chem. 2021 Oct 17;45(6):2013-2023. doi: 10.3906/kim-2101-45. eCollection 2021.
Mesoporous polyethylene glycol (PEG)/silica and carbon black (CB)/silica xerogel composites were prepared by the sol-gel method as an adsorbent for CO adsorption. The CO adsorption process was carried out under pure CO atmosphere at room temperature in addition to ambient air. The xerogel composites with high surface area and pore volume showed better CO adsorption capacity than the pure silica xerogel. After modifying samples with propylene diamine using the wet impregnation method, an increase in CO adsorption capacity was observed for the samples except CB/silica xerogel composite. The highest CO adsorption capacity was determined as approximately 0.80 mmol/g for amine modified PEG/silica xerogel composite under pure CO exposure. According to the adsorption-desorption cyclic stability test, it was clear that the stable samples were obtained, which is a desirable property for all CO adsorbents. The promising findings revealed that the xerogel composites can be efficiently used as a CO adsorbent instead of conventional materials in many CO adsorption applications. Additionally, it can be expected that the xerogel composites can provide an effective adsorption process without high-cost, complexity, corrosion, and toxicity problems.
采用溶胶 - 凝胶法制备了介孔聚乙二醇（PEG）/二氧化硅和炭黑（CB）/二氧化硅干凝胶复合材料，作为用于CO吸附的吸附剂。除了在环境空气中，CO吸附过程还在室温下的纯CO气氛中进行。具有高比表面积和孔体积的干凝胶复合材料表现出比纯二氧化硅干凝胶更好的CO吸附能力。使用湿浸渍法用丙二胺对样品进行改性后，除了CB/二氧化硅干凝胶复合材料外，其他样品的CO吸附能力均有所提高。在纯CO暴露下，胺改性的PEG/二氧化硅干凝胶复合材料的最高CO吸附容量测定为约0.80 mmol/g。根据吸附 - 解吸循环稳定性测试，很明显获得了稳定的样品，这是所有CO吸附剂都期望具备的特性。这些有前景的发现表明，在许多CO吸附应用中，干凝胶复合材料可以有效地替代传统材料用作CO吸附剂。此外，可以预期干凝胶复合材料能够提供有效的吸附过程，而不存在高成本、复杂性、腐蚀性和毒性问题。
