Modified sorbents based on walnut shell for sorption of toxic gases
| Autor: | Seitkhan Azat, L.F. Velasco, P. Lodewyckx, A. R. Kerimkulova, Z. A. Mansurov |
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| Rok vydání: | 2022 |
| Předmět: |
010302 applied physics
Sorbent Chemistry Nanoporous chemistry.chemical_element Sorption 02 engineering and technology 021001 nanoscience & nanotechnology 01 natural sciences Adsorption Chemical engineering 0103 physical sciences medicine Texture (crystalline) 0210 nano-technology Cobalt Carbon Activated carbon medicine.drug |
| Zdroj: | Materials Today: Proceedings. 49:2521-2526 |
| ISSN: | 2214-7853 |
| Popis: | In this article, low-cost carbon-based nanoporous materials were synthesized and impregnated in order to offer a sufficient protection for a wide range of toxic chemicals. The microstructure analysis of the samples reveals that the activation promotes the formation of a higher number of small pores and the development of a spongy texture of the sorbents leading thus to an increase in carbon content. The activated samples have apparent micro-mesoporosity confirmed by the corresponding isotherms of low-temperature adsorption of nitrogen. Furthermore, it has been shown that the activation procedure leads to samples with different acidity and this surface property has a marked influence on the performance of the materials. The results of a breakthrough time study for vapors of inorganic and organic substances indicate that the impregnations with Cu and Co are the most suitable for obtaining a universal sorbent. In this regard, an activated carbon impregnated with cobalt that can outperform commercial reference materials intended for this specific application has been developed in this work. |
| Databáze: | OpenAIRE |
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