CAJ | 학술논문

研究以(NH4)6Mo7O24*4H2O为前驱物料所制得的MoO3／K2CO3／SiO2催化剂对高硫化氢合成气一步法合成甲硫醇的催化活性，考察K2CO3助剂对钼基催化剂催化行为的影响。ESR表征结果显示，工作态催化剂观测到氧包围的"oxo－Mo(V)"(g=1.93)、硫包围的"thio－Mo(V)"(g=1.98)和S(g=2.01,g=2.04)等信号，随着K2CO3添加量的增加，oxo－Mo(V)含量增加，thio-Mo(V)含量减少；XPS表征显示，钼包含了Mo4+、Mo5＋和Mo6+的混合价态，硫包含了S2-(161.5eV)、(S－S)2-(162.5eV)和S6+(168.5eV)等3种物种，Mo5+/Mo4+摩比为0.4和S2-／(S-S)2-比接近1有利于甲硫醇的生成。
연구이(NH4)6Mo7O24*4H2O위전구물료소제득적MoO3／K2CO3／SiO2최화제대고류화경합성기일보법합성갑류순적최화활성，고찰K2CO3조제대목기최화제최화행위적영향。ESR표정결과현시，공작태최화제관측도양포위적"oxo－Mo(V)"(g=1.93)、류포위적"thio－Mo(V)"(g=1.98)화S(g=2.01,g=2.04)등신호，수착K2CO3첨가량적증가，oxo－Mo(V)함량증가，thio-Mo(V)함량감소；XPS표정현시，목포함료Mo4+、Mo5＋화Mo6+적혼합개태，류포함료S2-(161.5eV)、(S－S)2-(162.5eV)화S6+(168.5eV)등3충물충，Mo5+/Mo4+마비위0.4화S2-／(S-S)2-비접근1유리우갑류순적생성。
The catalytic activity of MoO3/K2CO3/SiO2 prepared with precursor (NH4)6Mo7O24 for the methantiol directly synthesis from syngas blending with high H2S content and the effects of promoter K2CO3 on the catalytic behavior of molybdenum-based catalyst were studied.The results of ESR characterization show that the signals of O-surrounded "oxo-Mo(V)"(g=1.93),S-surrounded"thio-Mo(V)"(g=1.98),and S(g=2.01 and 2.04)in functioning catalyst can be detected.The content of oxo-Mo(V) was found to increase with the added K2CO3 content increasing,while thio-Mo(V) was found to decrease.The XPS characterization indicated that Mo4+,Mo5+ and Mo6+ are main species included in the Mo content,and that S2- (161.5eV),(S-S)2-(162.5eV) and S6+(168.5eV) species are included in the S content.