AlOOH结构对甲醇和一氧化碳反应性能的影响

Effects of AlOOH Structure on the Reaction of Methanol and Carbon Monoxide

利用水热法制备了3种AlOOH催化剂,对其进行了表征,并用于催化甲醇和一氧化碳反应.结果表明,适宜的AlOOH结构有利于催化甲醇和一氧化碳反应生成高选择性(≥97.28%)的乙醛,且AlOOH结构的差异会导致反应产物分布出现明显区别.其中,结晶度高、孔径较大、能提供CO解离吸附中心且表面具有适宜酸碱性的AlOOH催化剂表现出高的乙醛选择性,推测乙醛的生成是通过中间体CH_3与HCO的偶联实现的.

The AIOOH catalysts prepared by hydrothermal method were characterized and used for the reac- tion of methanol and carbon monoxide. The results showed that proper AlOOH structure dramatically improved the selectivity of acetaldehyde（97.28% ） for the reaction of methanol and carbon monoxide. AlOOH structural distinction led to the differences of product distribution. Higher crystallinity, larger aperture, extensive CO dissociative adsorption centre and suitable acid-base of AIOOH catalysts significantly promoted selectivity of acet- aldehyde. The acetaldehyde generated by the coupling of CH3 and HCO.