【摘要】 研究了担载C₃H₇CCo₃（CO）₉络合物的脱羰基过程,发现担载于Al₂O₃上的络合物在真空或CO中均出现相当于Co（CO）₄表面络合物的特征羰基吸收带,其强度随温度的升高而增强,相应地相当于原来担载络合物的特征羰基带逐渐变弱,在300℃左右可以完全脱羰基。担载于ZrO₂和ZnO上者易于脱羰基,尤以ZnO为载体者更甚。担载络合物在He中的TPDE-GC谱表明主要以CO形式脱附,并有少量CO₂逸出,在高温下以ZrO₂为载体者出现CH₄。脱羰基样品中钴以Co²⁺形式存在于载体上。还研究了C0在担载Co催化剂上的吸脱附及其表面反应,讨论了载体对催化剂的吸附和表面加氢反应机理的影响。更多还原

【Abstract】 The decarbonylation of C3H7CCo3(CO)B complex supported on A12O3, ZrO2 and ZnO, the surface properties and the surface reaction of the dispersed Co catalysts have been studied. The complex supported on various oxides differs greatly in decarbonylation process. For the complex supported on A12O3, the characteristic carbonyl bands(1935 and 1875cm-1) corresponding to Co(CO) 4- complex are observed; when the supported complex heated in vacuum or in CO, the intensity of the characteristic bands increases somewhat with increasing the temperature, all carbonyl bands disappear at about 300C. For the complex supported on ZrO2 or ZnO, the carbonyl is desorbed easily as the temperature increase:).During TPD of CO adsorbed on the dispersed Co catalysts prepared from the supported complexes in He stream, the desorbed product consists essentially of CO2. TPSR of the weakly adsorbed CO in H, stream shows that the reaction product is composed mainly of CO2 at low temperature. For the Co/ZrO2 catalyst, the reaction product is composed essentially of CH4 at above 300C. According to the experimental results,the interaction between the complex and support, the decarbonylation of three supported complexes and the surface properties and the surface reaction of the dispersed Co catalysts are discussed.更多还原