【摘要】 采用等体积浸渍法制备了一系列不同负载量的活性炭负载镧催化剂，通过XRD、SEM、TEM、BET、NH₃-TPD等方法手段对催化剂进行表征，并用固定床评价其对甲醇和合成气制乙酸的影响。结果表明，镧在活性炭中高度分散，负载镧之后活性炭的孔结构和酸度发生了变化。在280℃、5 MPa、体积空速2 h^-1、v（CO）∶v（H₂）=1∶2的工艺条件下，5%La/AC催化剂的催化活性最好，甲醇转化率达90.40%,乙酸选择性为22.83%,乙酸甲酯选择性为11.16%。考察了温度和压力对反应的影响，发现最适宜的反应温度和压力分别为260℃和5 MPa。更多还原

【Abstract】 A series of activated carbon loaded lanthanum catalysts with different loading amount are prepared via equal-volume impregnation method, and characterized by means of XRD,SEM,TEM,BET,NH₃-TPD,etc.The effects of these catalysts on the production of acetic acid from methanol and syngas are evaluated on a fixed bed.It is found that La disperses highly in activated carbon, and the pore structure and acidity of activated carbon change after loading lanthanum.Under the conditions that T=280℃,pressure is 5 MPa, LHSV=2 h^-1,and v（CO）∶v（H₂）=1∶2,the 5% La/AC presents the best catalytic activity, the conversion rate of methanol is 90.40%,the selectivity of acetic acid is 22.83%,and the selectivity of methyl acetate is 11.16%.The influences of temperature and pressure on the reaction are also explored, showcasing that the most suitable temperature and pressure are 260℃ and 5 MPa, respectively.更多还原