Capillary Gas Adsorption Chromatography

An e-book on the use of capillary gas adsorption columns in the lab and within a range of fields With capillary gas adsorption columns commonly in use in laboratories today, this book was written to present a consistent treatment of gas ...

DOWNLOAD NOW »

Author: V. G. Berezkin

Publisher: John Wiley & Sons

ISBN: 9783527614745

Category: Science

Page: 330

View: 177

Use of Coarse Porous Glass in Gas adsorption Chromatography for the Separation of Liquid Hydrocarbons

The possibility is pointed out of using coarse porous glass for the separation of normal alkanes and aromatic hydrocarbons with boiling temperatures up to 150C by the method of gas-adsorption chromatography.

DOWNLOAD NOW »

Author: S. P. Zhdanov

Publisher:

ISBN: OCLC:227402498

Category:

Page: 18

View: 595

The possibility is pointed out of using coarse porous glass for the separation of normal alkanes and aromatic hydrocarbons with boiling temperatures up to 150C by the method of gas-adsorption chromatography. A study of the dependence of the effectiveness of the column with coarse porous glass on the linear speed of the gas-carrier indicated the possible use of such columns at great linear speeds. From the chromatograms taken at various temperatures, the adsorption heats of a series of hydrocarbons on the hydroxylated surface of silicon were determined. The adsorption heats of normal alkanes and normal alkyl benzenes increase linearly with the increase in the number of carbon atoms in the molecule. The adsorption heat of ethylene is greater than that of benzene, and that of alkyl benzene is greater than the corresponding n-alkanes because of the specific interaction, primarily, of the pi-electron bonds with the hydroxyl groups of the surface. The values determined from the chromatograms of heat adsorption were close to those obtained calorimetrically. (Author).