Catalytic Removal of Toluene from Air Streams by Cobalt Oxide Supported on Sepiolite

Abstract

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 °C was found to be the optimum calcination temperature for Co20/Sep, since it achieved 90% toluene conversion at about 300 °C. The results showed that the selectivity of the catalysts towards CO 2 was complete and no byproducts were detected. Stability tests also indicated that Co20/Sep remains stable at 320 °C with complete conversion of toluene after 24 h. In conclusion, the results of this study confirmed sepiolitesupported cobalt oxide catalyst as an efficient catalyst for degradation of toluene.

Recent progress on catalysts for catalytic oxidation of volatile organic compounds: a review

“…Co 3 O 4 , as an efficient catalyst for VOC oxidation, has been widely studied. [236][237][238] Feng et al 58 synthesized a strontium-doped ceria-supported Co catalyst and evaluated its activity for toluene combustion (Fig. 20A).…”

Low temperature conversion of levulinic acid into γ-valerolactone using Zn to generate hydrogen from water and nickel catalysts supported on sepiolite

“…One of these materials is sepiolite, which has been used as a catalytic support in many reactions. [26][27][28] Sepiolite is a hydrous magnesium silicate which presents many applications. Its main use is as absorbent, although it presents some other utilities such as pharmaceutical products, detergents, phytosanitary carriers, animal food.…”