Optimized Heating Rate and Soot-catalyst Ratio for Soot Oxidation over MoO3 Catalyst

Abstract

MoO3 is now utilized as a promising catalyst due to its high activity and favorable mobility at low temperature. Its spectral data and surface microstructures were characterized by Fourier transform infrared spectra (FT-IR) and Field emission scanning electron microscope (FESEM). Thermo-analysis of the carbon black was performed over nano-MoO3 catalyst in a thermogravimetric analyzer (TGA) at various heating rates and soot-catalyst ratios. Through the analysis of kinetic parameters, we found that the heat transfer effect and diffusion effect can be removed by setting lower heating rates and soot-catalyst ratios. Therefore, a strategy for selecting proper thermogravimetric parameters were established, which can contribute to the better understanding of thermo-analytical process. Copyright

Catalytic Soot Combustion─General Concepts and Alkali Promotion

“…There are also various attempts to use specific kinetic parameters determined for the catalytic process as reactivity descriptors, such as the average rate of soot oxidation, combustion activation energy proposed by Ozawa, the Coats–Redfern method, or other methods. ,− Although it is rather difficult to reliably estimate the kinetic parameters of soot oxidation, mainly because the true steady state is inherently impossible to achieve, as the amount of soot varies in the course of the reaction, kinetic modeling was performed by several authors. ,− In this context, the microkinetics or the global kinetics of soot oxidation in a diesel particulate filter (DPF) can serve as illustrative examples.…”

Selective Catalytic Reduction of NOx with Ammonia and Hydrocarbon Oxidation Over V2O5–MoO3/TiO2 and V2O5–WO3/TiO2 SCR Catalysts

“…In addition to V2O5, MoO3 is also well known for its ability to oxidize VOCs and soot [30][31][32][33][34][35][36]. In fact, when comparing alumina supported V2O5 and MoO3 catalysts, a lower temperature for soot oxidation and a higher CO2 selectivity was recorded for the molybdenum-based sample [30].…”