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Journal of the Brazilian Chemical Society

Print version ISSN 0103-5053On-line version ISSN 1678-4790

Abstract

ARDAKANI, Mahdi B.; MAHABADI, Hasan A.  and  JAFARI, Ahmad J.. Catalytic Removal of Toluene from Air Streams by Cobalt Oxide Supported on Sepiolite. J. Braz. Chem. Soc. [online]. 2019, vol.30, n.9, pp.1933-1940.  Epub Sep 16, 2019. ISSN 0103-5053.  http://dx.doi.org/10.21577/0103-5053.20190106.

Removal of toluene using cobalt oxide supported on sepiolite catalysts was investigated. Deposition precipitation method was used to prepare the catalysts. The catalysts were characterized using X-ray diffraction, field emission scanning electron microscopy, energy dispersive X-ray spectroscopy, thermogravimetric analysis (TGA) and Brunauer-Emmet-Teller methods. The results of catalytic testing showed that 20% cobalt oxide/sepiolite (Co20/Sep) had higher catalytic activity for degradation of toluene. A temperature of 400 ºC was found to be the optimum calcination temperature for Co20/Sep, since it achieved 90% toluene conversion at about 300 ºC. The results showed that the selectivity of the catalysts towards CO2 was complete and no byproducts were detected. Stability tests also indicated that Co20/Sep remains stable at 320 ºC with complete conversion of toluene after 24 h. In conclusion, the results of this study confirmed sepiolite-supported cobalt oxide catalyst as an efficient catalyst for degradation of toluene.

Keywords : sepiolite; cobalt oxide; toluene; catalytic degradation.

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