【摘要】 为研究催化裂化烟气轮机结垢的形成过程,选择催化裂化装置三旋细粉作为对象,采用X射线衍射、扫描电镜和同步热分析等技术,考察三旋细粉经不同温度处理后样品的晶相结构、表面形貌、差热曲线、孔结构和骨架密度等。通过对比不同温度样品的物理化学变化规律,提出催化剂细粉的结垢机制。结果表明,结垢过程是催化剂细粉的液相烧结形成致密固相的过程。更多还原

【Abstract】 Fluid catalytic cracking(FCC) catalyst fines obtained from the third cyclone separator underflow were used as raw materials to study the scaling mechanism of flue gas expander. Crystal phase structure,thermal stability,micro-morphology pattern and skeleton density of FCC catalyst fines were explored by means of XRD,TG-DTA,SEM and density analysis at different temperatures. By comparing the variation rule of samples’ physical and chemical properties,the scaling mechanism was proposed. The results show that the scaling process is the liquid phase sintering and densitification of catalyst fines.更多还原