采用共沉淀法制备甲醇氧化制甲醛用铁钼催化剂,利用XRD、TEM、ICP等表征手段探究催化剂制备过程中滴加方式、各组分金属摩尔比、沉淀过程的pH、焙烧温度以及催化剂成型方式对催化剂活性的影响。结果表明,在并流滴加过程中控制pH为2.5、金属铁钼元素最佳摩尔比为1∶3.4、催化剂焙烧温度为450℃以及拉西环成型催化剂条件下,甲醛收率可达96%以上;优选的催化剂在800 h的寿命评价实验中活性稳定、未见明显衰减,具备潜在的工业化生产价值。

Fe-Mo catalyst for methanol oxidation to formaldehyde is prepared through a coprecipitation method.XRD,TEM,ICP and other characterization methods are utilized to explore the impacts of dropping method,molar ratio of each metal component,and pH during precipitation process,calcination temperature and catalyst molding method on the activity of the catalyst.Results show that the yield of formaldehyde can exceed 96% when pH is controlled at 2.5 in co-flow dropping,the optimal ratio of iron to molybdenum is 1∶3.4,catalyst calcination temperature is at 450℃ and Raschig ring is used for catalyst shaping.The preferred catalyst shows stable activity and no significant attenuation in the life evaluation experiment lasting for 800 hours,which has potential industrial production value.

张杰(1997-),男,硕士生,研究方向为新能源材料与器件,zhangjie290318@163.com;刘向春(1975-),男,博士,教授,研究方向为光电信息功能材料,通讯联系人,liuxc_xust@163.com。