H_2/CO中Fe_3(CO)_(12)/Y催化剂小金属离子特性研究

Studies on the properties of the small Fe particels of Fe_3(CO)_(12)/Y catalyst over the reaction of CO/H_2

以Fe3(CO) 12 为母体制备的Fe3(CO) 12 /Y催化剂在较低反应温度 2 80℃表现出高活性和低碳烯烃选择性 ,而以Fe(NO3) 3 为母体制备的Fe(NO3) 3/Y催化剂无催化活性。Fe3(CO) 12 /Y和Fe(NO3) 3/Y催化剂在程序升温反应中CO和H2 浓度变化曲线呈现截然不同的两种变化趋势 ,前者为小金属粒子异变趋势 ,后者为普通金属粒子顺变趋势。Fe3(CO) 12 /Y催化剂高活性及低碳烯烃选择性与其高分散小金属粒子特性密切相关。

The Fe 3(CO) 12 /Y catalyst prepared from Fe 3(CO) 12 possesses high reactive activity and selectivity for the low carbon olefins over the reaction of CO/H 2 at 280℃,while the Fe(NO 3) 3/Y catalyst prepared from Fe(NO 3) 3 exhibits no activity The trend of concentration changing of CO is the sameas that of H 2 for Fe 3(CO) 12 /Y catalyst during the process of temperature-programmed-reaction, which displays the peculiar properties of the small Fe particles However, the trend of concentration changing of CO is opposite to that of H 2 for Fe(NO 3) 3 /Y catalyst The different behavior of the Fe 3(CO) 12 /Y catalyst compared with Fe(NO 3) 3 catalyst is related to the characters of the small Fe particles in the state of high dispersion [WT5”HZ]