Citation: Jing Chang ZHANG, Ming Ming WU, Jing Yun LU, Guang Sheng GUO, Xiao Dong HE, Fu Ming YANG. PREPARATION OF ULTRAFINE PARTICLE IRON-CARBONIDE CATALYST AND CHARACTERIZATION OF ITS CATALYTICAL BEHAVIOR[J]. Chinese Chemical Letters, ;1993, 4(3): 275-278.
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Studies on ultrafine particle catalyst have attracted many researchers'attention by its large surface area,higher activity and selectivity[1-3].Based on the mechanism of α-Fe and FexCy as the catalytical active species[4-7] this paper reports for the first time the preparation method of Fe3C ultrafine particle catalyst,from highly dispersed amorphous Fe powder and free carbon.The Fe powder and free carbon,prepared by laser pyrolysis technique,was then treated by washing and heating at high temperature protected with N2.The catalyst prepared under different experimental conditions was characterazed by means of XRD,electronic diffraction and TEM.It shows that the crystlline grain size is in a range of 1-4nm and composed of Fe3C and α-Fe.It has been found that the ultrafine particleironcarbonide catalyst exhibited much higher activity and selectivity to light olefins.At the standard atmosphere and 380℃ reaction temperature,the conversion of CO reached a maximum of 80%.
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