Average fluid catalytic cracking

Example 9.7. Approximately 40% of the oil produced in the world is cracked catalytically to smaller molecules with zeolite catalysts—known as FCC (fluid catalytic cracking). The catalyst has an average diameter around 70 p,m and it becomes coarser with time as the fine fraction of the powder is lost in the cyclones. For a FCC unit containing 2001 of catalyst, what is the smallest sample size required to achieve a sampling error less than 5% if the coarsest size range is from 177 ttm to 210 tim. The particle density of FCC is 1200 kg m . ... 

Table 2. Average Effect of Variables in Fluid Catalytic Cracking Murphy and Cheng (1984)...

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