Influence of Surface Tension of the Intrapore Liquid on Structural-Surface Properties of Hydrated Aluminum Oxide Obtained by Interaction of Aluminum Salts with Ammonia Gas

Abstract:

This paper presents the results of the studies on the effect of the surface tension of the intrapore liquid on the specific surface (S_BET) and pore volume (V_BJH) of hydrated aluminium oxide (HAO) obtained by treating aluminum potassium alum with ammonia. It has been found that replacing of water, the surface tension of which at the drying temperature is 57.87 mN/m, to acetone (13.19 mN/m) allows to increase both S_BET and V_BJH nearly 4 times. There are obtained equations, which connect specific surface area and specific pore volume of synthesized samples HAO with surface tension of intrapore area. It is 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.

• Periodical: Key Engineering Materials (Volume 910)
• Pages: 787-794
• DOI: https://doi.org/10.4028/p-7pq7rl
• Online since: February 2022
• Authors: Dmitry Maiorov, Yuriy Velyaev*, Kirill Yakovlev, V.M. Gavrish
• Keywords: Aluminum Potassium Sulfate, Hydrated Aluminum Oxide, Liquid Surface Tension, Specific Pore Volume, Specific Surface Area

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