ISSN:
1572-8943
Schlagwort(e):
adsorption ofn-aliphatic alcohols on alumina
;
microcalorimetry
;
thermokinetic investigation
Quelle:
Springer Online Journal Archives 1860-2000
Thema:
Chemie und Pharmazie
Notizen:
Abstract A differential microcalorimeter (E. Calvet) was used to study the processes of adsorption of five aliphatic alcohols (C1-C5) on α-Al2O3 at 25, 50, 100, 150 and 200°C. In particular, the importance of the thermokinetic study of the chemisorption of such alcohols at different experimental temperatures was demonstrated, with regard to the variations in the thermokinetic parameters (tmax, t1/2 and t0) and the evolution of the alcohol vapor pressure on the adsorbent during the adsorption process. It was concluded that: a) all the heat emission peaks of alcohol adsorption have the same rounded shape at 25°C; b) on passing from methanol to 1-pentanol, the area of the adsorption peaks increases as the chain length or molecular weight increases; c) on passing from 25 to 200°C, the shape of the adsorption peaks becomes more pointed.
Materialart:
Digitale Medien
URL:
http://dx.doi.org/10.1007/BF01996745
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