Zarębska Katarzyna, Nomura Mikihiro, Wolczko Marta, Szczurowski Jakub, Pawlak Bartłomiej, Baran Paweł
Faculty of Energy and Fuels, AGH University of Science and Technology, Al. Mickiewicza 30, 30-059 Krakow, Poland.
Department of Applied Chemistry, Shibaura Institute of Technology, 3-7-5 Toyosu, Koto-ku, Tokyo 135-8548, Japan.
Materials (Basel). 2023 Jul 6;16(13):4853. doi: 10.3390/ma16134853.
In this paper, the sorption of NH, HO, SO and CO was tested for several selected inorganic materials. The tests were performed on samples belonging to two topologies of materials, faujasite (FAU) and framework-type MFI, the structures of which differ in pore size and connectivity. All sorbates are important in terms of reducing their emissions to the environment. They have different chemical nature: basic, alkaline, and acidic. They are all polar in structure and composition and two of them (ammonia and water vapor) can form hydrogen bonds. These differences result in different interactions with the surface of the adsorbents. This paper presents experimental data and proposes a mathematical description of the sorption process. The best fit of the experimental data was obtained for the Toth and GAB models. The studies showed that among the selected samples, faujasite has the best sorption capacity for ammonia and water vapor, while the best sorbent for sulfur dioxide is the MFI framework type. These materials behave like molecular sieves and can be used for quite selective adsorption of relevant gases. In addition, modification of the faujasite with organic silane resulted in a drastic reduction in the surface area of the sorbent, resulting in significantly lower sorption capacities for gases.
在本文中，对几种选定的无机材料进行了氨、水、二氧化硫和二氧化碳的吸附测试。测试针对属于两种材料拓扑结构的样品进行，即八面沸石（FAU）和骨架型MFI，它们的结构在孔径和连通性方面存在差异。所有被吸附物对于减少其向环境中的排放都很重要。它们具有不同的化学性质：碱性、碱性和酸性。它们在结构和组成上都是极性的，其中两种（氨和水蒸气）可以形成氢键。这些差异导致与吸附剂表面的相互作用不同。本文展示了实验数据并提出了吸附过程的数学描述。实验数据与Toth模型和GAB模型拟合得最好。研究表明，在选定的样品中，八面沸石对氨和水蒸气具有最佳吸附能力，而对二氧化硫的最佳吸附剂是MFI骨架型。这些材料表现得像分子筛，可用于对相关气体进行相当选择性的吸附。此外，用有机硅烷对八面沸石进行改性导致吸附剂表面积大幅降低，从而使气体吸附容量显著降低。
