Improvement of low temperature carbon combustion catalyst characteristic caused by mixing Bi2O3 with Tl2O3

This study investigated the addition of various oxides to further improve the catalytic characteristics of Tl2O3, which offers a high carbon combustion catalytic capacity to lower the carbon combustion temperature of 660 degrees C by similar to 300 degrees C. Mixtures of carbon (2 wt%) with composite catalysts comprising 20 wt%Tl2O3-80wt% added oxide were analyzed using DSC. Bi(2)O(3 )offered the best improvement, where the exothermic peak temperatures for carbon combustion of carbon with various Tl2O3-x wt% Bi2O3 composites were lower than that of carbon with pure Tl2O3. Isothermal TG measurements were performed using a mixture of carbon and the Tl2O3-95 wt% Bi(2)O(3 )composite catalyst, where a 2 wt% weight loss (i.e. removal of all carbon) was achieved above 230 degrees C. A porous alumina filter was coated with the composite catalyst and carbon was deposited on the filter surface. The filter was held at constant temperatures under air flow, which confirmed that carbon was completely removed at 230 degrees C. This study demonstrated the potential for using these composite catalysts in self-cleaning particulate filters to decompose and eliminate fine particulate matter and diesel particulate matter generated from steelworks, thermal power plants, and diesel vehicles simply using the heat of the exhaust gas in a factory flue-gas stack or vehicle muffler.

Automated summary

This study investigates the addition of various oxides to enhance the catalytic properties of Tl2O3, with Bi(2)O(3) offering the most significant improvement in lowering the exothermic peak temperatures for carbon combustion. The research demonstrates the potential of using composite catalysts in self-cleaning particulate filters to remove fine particulate matter and diesel particulate matter emitted from industries and vehicles.