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Qiang Wanga,Ji Hyang Sohn,So Ye Park,Jin Seong Choi,Joo Young Lee,정종식 한국공업화학회 2010 Journal of Industrial and Engineering Chemistry Vol.16 No.1
Pure phase K4Zr5O12 is synthesized via solid state method in the present work. Various K/Zr ratios and temperatures are applied, and the synthesis process is investigated in detail by means of X-ray diffraction, Fourier transform infrared spectroscopy, scanning electron microscopy, and X-ray photoelectron spectroscopy. Its catalytic activity for soot oxidation is studied by temperature programmed oxidation with different types of soot/catalyst contacts. It is revealed that K4Zr5O12 is very active in the presence of 2–10% O2 for both tight and loose contacts (Tp(tight) = 335 oC, Tp(ethanol) = 355 oC and Tp(shaking) = 370 oC). Thermal stability study shows that K4Zr5O12 is highly stable up to at least 900 oC.