| Autor: |
Dmitry Maiorov, Yuriy Velyaev, Kirill Yakovlev |
| Rok vydání: |
2022 |
| Předmět: |
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| Zdroj: |
Materials Science Forum. 1052:68-73 |
| ISSN: |
1662-9752 |
| DOI: |
10.4028/p-7mtu04 |
| Popis: |
This paper shows the research results on the effect of the surface tension of the intrapore liquid on the specific surface and pore volume of hydrated aluminum oxide (HAO) obtained by treating aluminum potassium alum with ammonia. It is established that water replacement by acetone before drying allows practically ~ 4 times to raise both specific surface area (SBET), and specific pore volume (VBJH). There are obtained the equations, which connect specific surface area and specific pore volume of synthesized HAO samples with the surface tension of inner-pore medium. It has been found that in the initial presence of water in the aluminum hydroxide pores, the average pore diameter of the dried product is 3÷4 nm. Treatment of the synthesized sample with acetone increases the average pore diameter of the dried product to 5÷10 nm. The process of sorption of nitrogen and water vapors with HAO samples was investigated. The capacity of monomolecular absorption layer (Qm), constant C of BET equation and change of internal energy of system into sorption processes (ΔGo) are calculated. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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