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  Home > JCE Print > Journal of Chemical Education > Issues > 2006  > June  >
In the Laboratory
Cost-Effective Teacher
Construction of a Low-Cost Apparatus for Gas Adsorption on Solids
Hugo Macedo, Ana Aguiar Ricardo, and João Sotomayor
REQUIMTE, CQFB, Departamento de Química, FCT, Universidade Nova de Lisboa, Caparica, 2829-516, Portugal
Cover
June 2006
Vol. 83 No. 6
p. 915
Abstract
The construction of a low-cost apparatus for gas adsorption on solids and prior heat treatment of the adsorbent are discussed. The equilibrium pressure of the gas in a calibrated volume at a constant temperature is related to the extent of the gas adsorption. By means of the adsorption results, the solid surface-area calculation is performed using both BET and Langmuir isotherms. This apparatus provides surface-area values in good agreement with both values obtained by a commercial instrument and those reported in the literature, within the experimental error.
Supplement
Details of the construction of the gas-adsorption appartus and the calculations are available.
*  Contents Folder JCE2006p0915W containing JCE2006p0915W.doc (Microsoft Word) and JCE2006p0915W.xls (Microsoft Excel)
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*  Citation
 Macedo, Hugo; Ricardo, Ana Aguiar; Sotomayor, João. J. Chem. Educ. 2006 83 915.
*  Keywords
 Analytical Chemistry; Gases; Hands-On Learning / Manipulatives; Laboratory Equipment / Apparatus; Laboratory Instruction; Physical Chemistry; Physical Properties; Quantitative Analysis; Surface Science; Upper-Division Undergraduate
*  History
 Created:
Last Updated:		 4/24/2006
4/25/2006
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