Porosity in ion-exchanged and acid activated clays evaluated using n-Nonane (cas 111-84-2) pre-adsorption
-
Add time:08/23/2019 Source:sciencedirect.com
The applicability of the n-Nonane (cas 111-84-2) pre-adsorption method for characterising the porosity in clays is presented. Na-SD, a Na+-exchanged purified bentonite, and materials obtained by Al3+-exchange and acid treatments of Na-SD and SAz-1 were used. Nitrogen adsorption isotherms, at −196 °C, were determined before and after n-nonane pre-adsorption on each of the samples. In all materials, n-nonane remained adsorbed in ultramicropores after outgassing at 25 °C. Outgassing at higher temperatures (50, 75 and 200 °C) removed nonane and ultramicropores became available for nitrogen adsorption. All treatments on Na-SD led to increase in micropore volume. Larger ultramicropore and supermicropore volumes were obtained for Na-SD acid activated with HCl at 95 °C than for treatments at 25 °C with HCl or following Al3+-exchange (Al-SD), and increased with increasing acid concentration to 3 M. Activation with 4 M HCl led to the largest pore volume with contribution from mesopores. However, the specific external surface area was the same as that obtained for Na-SD, Al-SD and for most of the other acid activated samples. Treatments at 95 °C with 1 M and 6 M HCl promoted increase in specific external surface area. The micropore volumes and specific external surface area for SAz-1 treated with 1 M HCl at 95 °C were larger than those of Al-SAz-1, but lower than those obtained for corresponding materials derived from Na-SD. The n-nonane pre-adsorption method enabled micropore volumes and specific external surface areas to be obtained for all samples.
We also recommend Trading Suppliers and Manufacturers of n-Nonane (cas 111-84-2). Pls Click Website Link as below: cas 111-84-2 suppliers
Prev:Density, sound speed and derived thermophysical properties of n-Nonane (cas 111-84-2) at temperatures between (283.15 and 473.15) K and at pressures up to 390 MPa
Next:Full Length ArticleShock tube study of n-Nonane (cas 111-84-2)/air ignition over a wide range of temperatures) - 【Back】【Close 】【Print】【Add to favorite 】
- Related Information
- Blending effects on ignition delay times of methyl octanoate/n-Nonane (cas 111-84-2)/methylcyclohexane08/28/2019
- Density, viscosity and excess molar volume of binary mixtures of tri-n-octylamine + diluents (n-heptane, n-octane, n-Nonane (cas 111-84-2), and n-decane) at various temperatures08/27/2019
- Synthesis, characterization, stereochemistry and antibacterial activity of N-acyl-2,4,6,8-tetraphenyl-3,7-diazabicyclo[3.3.1]nonanes08/26/2019
- 2D-COS of in situ μ-Raman and in situ IR spectra for structure evolution characterisation of NEP-deposited cobalt oxide catalyst during n-Nonane (cas 111-84-2) combustion08/25/2019
- Full Length ArticleShock tube study of n-Nonane (cas 111-84-2)/air ignition over a wide range of temperatures08/24/2019
- Density, sound speed and derived thermophysical properties of n-Nonane (cas 111-84-2) at temperatures between (283.15 and 473.15) K and at pressures up to 390 MPa08/22/2019
- Isothermal vapour-liquid equilibrium data for the binary systems of CHF3 with (n-Nonane (cas 111-84-2), n-decane, or n-undecane) and C2F6 with (n-Nonane (cas 111-84-2) or n-decane)08/21/2019
- Pressure dependence of the solubility of light fullerenes in n-Nonane (cas 111-84-2)08/20/2019
