Preparation and catalytic activity of K4Zr5O_(12) for the oxidation of soot from vehicle engine emissions

Qiang Wang; Ji Hyang Sohn; So Ye Park

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Preparation and catalytic activity of K4Zr5O_(12) for the oxidation of soot from vehicle engine emissions

机译：K4Zr5O_（12）的制备及其催化氧化汽车发动机烟灰的作用

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Pure phase K4Zr5O_(12) 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 K4Zr5O_(12) is very active in the presence of 2-10% O2 for both tight and loose contacts (T_(p(tight)) = 335 °C, T_(p(ethanol)) - 355 °C and T_(p(shaking))= 370 °C). Thermal stability study shows that K4Zr5O_(12) is highly stable up to at least 900 °C.

机译：本文通过固相法合成纯相K4Zr5O_（12）。应用各种K / Zr比和温度，并通过X射线衍射，傅里叶变换红外光谱，扫描电子显微镜和X射线光电子能谱详细研究合成过程。通过使用不同类型的烟灰/催化剂接触的程序升温氧化来研究其对烟灰氧化的催化活性。结果表明，K2Zr5O_（12）在2-10％O2的存在下对于紧密接触和松弛接触都非常活泼（T_（p（tight））= 335°C，T_（p（乙醇））-355°C和T_（p（shaking））= 370°C）。热稳定性研究表明，K4Zr5O_（12）在至少900°C的温度下具有很高的稳定性。

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《Journal of industrial and engineering chemistry》 |2010年第1期|共6页
作者
Qiang Wang; Ji Hyang Sohn; So Ye Park;
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正文语种 eng
中图分类化学工业;
关键词
K4Zr5O_(12); Soot oxidation; Solid state method; Loose contact; Thermal stability;

机译：K4Zr5O_（12）;烟尘氧化;固态法;接触不良;热稳定性;

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机译：K4Zr5O_（12）的制备及其催化氧化汽车发动机烟灰的作用
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Preparation and catalytic activity of K4Zr5O_(12) for the oxidation of soot from vehicle engine emissions

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