Nam, Suk Woo and Gavalas, George R. (1989) Adsorption and Oxidative Adsorption of Sulfur Dioxide on γ-Alumina. Applied Catalysis, 55 (1). pp. 193-213. ISSN 0166-9834. doi:10.1016/S0166-9834(00)82328-3. https://resolver.caltech.edu/CaltechAUTHORS:20151104-143220301
Full text is not posted in this repository. Consult Related URLs below.
Use this Persistent URL to link to this item: https://resolver.caltech.edu/CaltechAUTHORS:20151104-143220301
Abstract
The adsorption and oxidative adsorption of SO_2 on γ-Al_2O_3 have been investigated at temperatures of 500–700°C by Fourier transform infrared spectroscopy (FTIR) and thermogravimetric analysis (TGA). At temperatures above 500°C the adsorbed SO_2 species was characterized by an IR band at 1065 cm^(−1). The equilibrium coverage and initial rate of adsorption decreased with temperature, suggesting a two-step adsorption. When γ-Al_2O_3 was contacted with a mixture of SO_2 and O_2, adsorption of SO_2 and oxidation of the adsorbed SO_2 to a surface sulfate characterized by broad IR bands at 1070 cm^(−1) and 1390 cm^(−1) took place. Sulfate formation was found to be reversible, but the reverse reaction took several hours even at 700°C. The results of a series of TGA experiments under different atmospheres (SO_2-O_2-N_2;SO_2-N_2;O_2-N_2;N_2) strongly suggests that surface SO_2 and surface sulfate involve the same active sites such that SO_2 adsorption is inhibited by already formed sulfate. The results also indicate a broad range of site strengths.
| Item Type: | Article | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Related URLs: |
| |||||||||
| ORCID: |
| |||||||||
| Additional Information: | © 1989 Elsevier Science Publishers B.V. Received 29 December 1988, revised manuscript received 12 July 1989. | |||||||||
| Issue or Number: | 1 | |||||||||
| DOI: | 10.1016/S0166-9834(00)82328-3 | |||||||||
| Record Number: | CaltechAUTHORS:20151104-143220301 | |||||||||
| Persistent URL: | https://resolver.caltech.edu/CaltechAUTHORS:20151104-143220301 | |||||||||
| Usage Policy: | No commercial reproduction, distribution, display or performance rights in this work are provided. | |||||||||
| ID Code: | 61848 | |||||||||
| Collection: | CaltechAUTHORS | |||||||||
| Deposited By: | Ruth Sustaita | |||||||||
| Deposited On: | 06 Nov 2015 20:24 | |||||||||
| Last Modified: | 10 Nov 2021 22:54 |
Repository Staff Only: item control page
