CAJ | 학술논문

用TPSR、NH3-TPD、XPS、EPR和UV-DRS等手段对担载型镍催化剂上丙烯吸附与齐聚反应的特征进行了系统的考察。结果发现，以SiO2-Al2O3、γ-Al2O3、HZSM-5为载体的镍催化剂上，除两类强弱不同的酸中心外，还存在第3类活性中心，即配位型镍催化活性中心。催化剂表面Ni+是丙烯吸附与齐聚反应的活性中心，并提出一种新的丙烯齐聚反应机理。
용TPSR、NH3-TPD、XPS、EPR화UV-DRS등수단대담재형얼최화제상병희흡부여제취반응적특정진행료계통적고찰。결과발현，이SiO2-Al2O3、γ-Al2O3、HZSM-5위재체적얼최화제상，제량류강약불동적산중심외，환존재제3류활성중심，즉배위형얼최화활성중심。최화제표면Ni+시병희흡부여제취반응적활성중심，병제출일충신적병희제취반응궤리。
The nature of adsorption and oligomerization of propylene on nickel based catalysts was extensively investigated by combining techniques,such as temperature programmed surface reaction(TPSR),temperature programmed desorption of ammonia (NH3-TPD),X-ray photoelectron energy spectroscopy(XPS),electron paramagnetic resonance(EPR),and ultraviolet differential reflection spectroscopy (UV-DRS).There are three kinds of active sites existed on the surface of supported nickel catalysts,the strong acid site(720～820 K),the weak acid site(540～580 K)and the third one which in fact is the complex nickel based sites.Further characterizations showed that surface anchored Ni+ may be the active sites for the adsorption and oligomerization of propylene and that ［Ni(C3H6)］+, ［Ni(C3H6)2］+ and ［Ni(P)］+ may be the active intermediates of oligomerization of propylene. The possible activation pattern of nickel based catalysts and the mechanism of propylene oligomerization were also postulated.