Determination of the Specific Surface Acidity of Al2O3 / CdO System by TPD Method using Pyridine as a Base

Authors

  • Akel Roumie
  • Husam Al-dien Kawass
  • Salma Al-Qadi

Abstract

In this work, six different samples of the  Al2O3 / CdO system were prepared in a co-precipitation method. Samples were prepared from saturated solutions for cadmium and aluminum salts using concentrated ammonia as a precipitating agent at pH = 8 and after settling and drying the sample was calcined at 400°C for two hours.

In order to studied the surface acidity by temperature programmed desorption (TPD) method. The calcined sample was divided to two parts: The TG-DTA measurements was carried on for the first part in order to determine the loss weight using thermal program in the range 20-900°C and 10°C/min. The second part was impregnated in pyridine for 24h, and dried at 120°C to remove the physical adsorbed pyridine and the TG-DTA measurements were performed at the same conditions for the first part.

Differential curves were studied to calculate the weight loss produced by the desorption  of pyridine. The AC8 (1-1) showed the highest surface acidity value (0.47m.mol / g), while the sample AC8 (1-0.25) gave the lowest acidity surface value (0.11m.mol / g).

 

 

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Published

2018-09-30

How to Cite

1.
Roumie A, Kawass HA- dien, Al-Qadi S. Determination of the Specific Surface Acidity of Al2O3 / CdO System by TPD Method using Pyridine as a Base. TUJ-BA [Internet]. 2018Sep.30 [cited 2024May4];39(5). Available from: https://journal.tishreen.edu.sy/index.php/bassnc/article/view/4010

Issue

Vol. 39 No. 5 (2017): Tishreen University Journal for Research and Scientific Studies - Basic Sciences Series

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Articles

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