流化床喷雾造粒制备MTO薄层催化剂实验研究

The Preparation of MTO Thin-film Catalysts Using Fluidized Bed Spray Granulation

根据甲醇制烯烃流化床反应-再生工艺对催化剂反应性能、球形度、耐磨强度等的要求,利用流化床喷雾造粒法制备了MTO薄层催化剂。实验研究了进料流率、分子筛组合物与粘结剂质量比、分子筛组合物浓度对薄层生长速率的影响并比较了分别以分子筛和成型催化剂为原料造粒时的薄层生长速率。实验结果表明,当分子筛组合物浓度高、进料流率大时,催化剂涂层生长速率快,表面活性成分负载量大。

SAPO catalyst was used in the fluidized bed reaction-regeneration process for methanol to olefins which required good catalyst properties, particle sphericity, attrition resistance. In this paper MTO thin-film catalyst was made using fluidized bed spray granulation. The factors influencing thin-film catalysts＇ growth rate such as flow rate of slurry, the concentration of the molecular sieve composition, the mass ratio of molecular sieve composition and binder were studied. The growth rate of thin-film between molecular sieve composition and formed catalyst was compared. The experimental results show that the growth rate of catalyst coating and the quality of active constituents increased with higher flux of slurry and larger molecular sieve composition concentration.