𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Characterization of Microporous Aluminas by Inverse Gas Chromatography

✍ Scribed by Frank Thielmann; Edwin Baumgarten

Publisher
Elsevier Science
Year
2000
Tongue
English
Weight
81 KB
Volume
229
Category
Article
ISSN
0021-9797

No coin nor oath required. For personal study only.

✦ Synopsis

Inverse gas chromatography (IGC) is a versatile tool for the characterization of porous solids. IGC at finite dilution has historically been used for isotherm measurements because of fast equilibration times. A combination of IGC with a flash thermodesorption method allows the separation of micropores and outer surface contributions due to different adsorption mechanisms. Whereas the outer surface and the mesopores have a mono-/multilayer sorption mechanism, the micropores are filled according to the "theory of volume filling of micropores" model. Therefore, a higher energy is required for desorption out of micropores than for desorption out of mesopores and from the surface. This difference is used to calculate two separate isotherms respective to each contribution. Four aluminas with different microporosities are investigated to show the benefit of this approach.

πŸ“œ SIMILAR VOLUMES

Characterization of monolithic capillary
Characterization of monolithic capillary columns using inverse gas chromatography
✍ Anastasiya Kanatyeva; Alexander Korolev; Valeria Shiryaeva; Tamara Popova; Alexa πŸ“‚ Article πŸ“… 2009 πŸ› John Wiley and Sons 🌐 English βš– 460 KB

## Abstract Polymeric monoliths of different polymeric natures and different degrees of cross‐linking were prepared in capillaries of inner diameter 100 ΞΌm. The properties of the monoliths prepared were investigated by means of inverse gas chromatography. Solubility coefficient __S__, Flory–Huggins

Inverse gas chromatography of wool
Inverse gas chromatography of wool
✍ J. R. McLaughlin; C. G. Pope πŸ“‚ Article πŸ“… 1982 πŸ› John Wiley and Sons 🌐 English βš– 730 KB
Surface characterization of salmeterol x
Surface characterization of salmeterol xinafoate powders by inverse gas chromatography at finite coverage
✍ Henry H.Y. Tong; Boris Y. Shekunov; Peter York; Albert H.L. Chow πŸ“‚ Article πŸ“… 2005 πŸ› John Wiley and Sons 🌐 English βš– 96 KB

In our previous studies, surface analysis by inverse gas chromatography (IGC) at infinite dilution (zero coverage) was performed on four salmeterol xinafoate (SX) powdered samples, viz, two supercritical CO 2 -processed Form I (SX-I) and Form II (SX-II) polymorphs, a commercial granulated SX (GSX) r