ChemNet
 
Previous article Next article Contents  

I. N. Beckman

Diagnostics of basalt fiber adsorbents

Abstract

Basalt planar sorbents successfully were used for the uptake of acid gases, organic vapours and water vapours from the air or natural gas streams, respectively. The adsorption active filters made of the porous basalt fibres have advantages in comparison to traditional granulated sorbents as they possess lower diffusion resistance and higher sorption ability Consecutive chemical leaching of the basalt fibres by hydrochloric acids was used in the development of porous active surface of the basalt fibres. New sorbents were prepared from non-porous basalt fibres by means of chemical leaching in two steps. The sorption properties of the basalt based sorbents for 2 – butanol were measured and the respective sorption capacities were determined. The nitrogen sorption method and the BET model were used for the determination of the sample specific surface area; the BJH calculation yields the pore size distribution. It was established, that the sorption capacity on the porous, chemically leached basalt fibres is comparable with natural zeolites and industrial silicogels. Methods of thermal analysis (such as thermogravimetry, differential thermal analysis and evolved gas detection), were used for the characterisation of the sorbent. The temperature necessary for the regeneration of the basaltic porous felt is by 200° lower than for natural zeolites. Consequently, the significant energy saving can be achieved in the industrial scale, when using in the sorption modules the active filters made of the chemically leached basalt fibres.
Moscow University Chemistry Bulletin.
2003, Vol. 44, No. 5, P. 342
   

Copyright (C) Chemistry Dept., Moscow State University, 2002
   Overview
   Editorial board
   Tables of Contents
   Subscription

The site is supported by Russian Foundation for Basic Research
  The using of published on this page materials is not allowed without special permission
Copyright (C) Chemisty Department of Moscow State University
Web-Editor: B.I.Pokrovskii
Web-design: Copyright (C) MIG and VVM
webmaster@www.chem.msu.su