Four-way catalytic performance of MgAlO doped by K

doi:10.7523/j.issn.2095-6134.2018.03.004

›› 2018, Vol. 35 ›› Issue (3): 308-313.DOI: 10.7523/j.issn.2095-6134.2018.03.004

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Four-way catalytic performance of MgAlO doped by K

ZHANG Junwu¹, YANG Li¹, ZHANG Yuxiu¹, SHU Xinqian¹, DENG Zengshe²

1 School of Chemical and Environmental Engineering, China University of Mining and Technology(Beijing), Beijing 100083, China;
2 Shaanxi Coal Chemical Industry Technology Research Institute Co Ltd, Xi'an 710065, China

Received:2017-02-07 Revised:2017-04-25 Online:2018-05-15

Abstract

Abstract: A series of K-MgAlO catalysts were synthesized by coprecipitation and impregnation methods. The K-MgAlO catalysts were characterized by X-ray diffraction (XRD), scanning electron microscope (SEM), and Fourier transform infrared (FT-IR) spectroscopy. The catalytic activity of K-MgAlO for simulation diesel engine exhaust gas was tested by the temperature programmed. The results showed that K existed on the surface of MgAlO in highly dispersed form when it is doped by 7%. The conversion rates of NO, CO, and C₃H₆ using the K-MgAlO catalyst reached 80% at the temperatures of 343, 335, and 298℃, respectively. The ignition temperature of soot was reduced from 380 to 253℃. All the results indicate that the four-way catalytic effect of MgAlO doped by K is stronger than that of the MgAlO catalyst.

Key words: four-way catalysts, diesel exhaust, Mg-Al hydrotalcite, potassium

CLC Number:

ZHANG Junwu, YANG Li, ZHANG Yuxiu, SHU Xinqian, DENG Zengshe. Four-way catalytic performance of MgAlO doped by K[J]. , 2018, 35(3): 308-313.

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Four-way catalytic performance of MgAlO doped by K

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