ISSN:
1572-8943
Keywords:
carbon molecular sieves
;
coke deposition
;
propylene cracking
;
surface area
Source:
Springer Online Journal Archives 1860-2000
Topics:
Chemistry and Pharmacology
Notes:
Abstract Carbon molecular sieves (CMS) were prepared from Greek lignite by a thermal treatment technique involving three sequential stages: carbonization, followed by activation with an oxidizing agent, and aperture modification by coke deposition. Adsorption of N2 at 77 K and CO2 at 298 K was used for the characterization of products. Molecular sieving properties were examined by measuring the adsorption kinetic curves of CO2 and CH4 at room temperature. Activated samples with the highest surface area were selected for CMS production by employing a propylene cracking technique. High temperatures resulted in the production of materials with large differences in their BET and CO2 surface areas. CO2-CH4 selectivity ratios estimated from the adsorption kinetic curves were high for these samples.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1023/A:1010146103872
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