Y. F. Guo, C. H. Li, S. X. Lu and C. W. Zhao (2016) Low temperature CO catalytic oxidation and kinetic performances of KOH-Hopcalite in the presence of CO2. Journal/Rsc Advances 6 7181-7188. [In English]
Web link: http://dx.doi.org/10.1039/c5ra23806d
Keywords: COPPER MANGANESE OXIDE, CARBON-MONOXIDE OXIDATION, PREFERENTIAL, OXIDATION, OPERANDO-DRIFTS, TRANSITION, STABILITY, MECHANISM, AU/MNOX

Abstract: Catalytic removal of CO from fire smoke is critical to ensure human safety and post-fire atmospheric recovery in typical confined spaces. Copper manganese oxide compounds show promise as highly efficient catalysts for low temperature CO oxidation. However, the CO oxidation activity will be affected when the catalyst is applied in fire smoke containing high-concentration CO2. In this work, a bifunctional catalyst of KOH-Hopcalite is synthesized by impregnation of KOH on Hopcalite (copper manganese oxides mixture) precursor. The catalyst is characterized by N-2 adsorption-desorption, X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), X-ray photoelectron spectroscopy (XPS) and Fourier transform infrared spectroscopy (FT-IR). CO oxidation activity and long-term working stability of the precursor and catalyst in the presence of CO2 are investigated. CO oxidation activity of the precursor would decrease when CO2 is present. KOH modification can mitigate the inhibiting effect of CO2 on CO oxidation activity of the precursor. Reaction mechanisms and kinetic performances of the catalyst in the presence of CO2 are also demonstrated. The catalyst could be potentially utilized as a scavenging agent for post-fire cleanup and atmospheric recovery in confined spaces.