不同硅铝比ZSM-5分子筛催化剂一步法甲醇制汽油

分别使用硅铝比为26、38、60和90的ZSM-5分子筛原粉制备4种催化剂ZSM-5-26、ZSM-5-38、ZSM-5-60和ZSM-5-90,用于一步法甲醇制汽油实验,并对催化剂进行XRD、IR、BET和NH3-TPD表征。利用100 m L微反固定床实验装置,在反应温度380℃、系统压力2.0 MPa和空速1.0 h-1条件下,考察4种催化剂一步法合成汽油过程的甲醇转化率、产物分布和产品组成等性质。结果表明,ZSM-5-60分子筛催化剂性能相对较好,拥有32.2%较为理想的汽油收率和产物组成。

Study of ZSM-5 molecular sieve catalysts with different Si/Al ratios for methanol to gasoline with one step method

The catalysts ZSM-5-26,ZSM-5-38,ZSM-5-60 and ZSM-5-90 were prepared using ZSM-5 molecular sieve powder with Si/Al ratios of 26,38,60 and 90.The as-prepared catalysts were used in the experiment of methanol to gasoline with one step method,and were characterized by means of XRD,IR,BET and NH₃-TPD.In a 100 mL micro fixed bed experimental device,the reactive properties of ZSM-5 catalysts for methanol to gasoline,methanol conversion,product distribution and product composition were investigated under the condition of reaction temperature 380 ℃,reaction pressure 2.0 MPa and space velocity 1.0 h^-1.The results showed that ZSM-5-60 molecular sieve catalyst with Si/Al ratio of 60 exhibited better catalytic properties,and had ideal gasoline yield of 32.2% and product composition.