If Thiele modulus is ________________, then the pore diffusion resistance in a catalyst may be considered as negligible?
Correct answer: C. < 0.5
- A. 0
- B. ∞
- C. < 0.5
- D. > 0.5
Explanation
A small Thiele modulus indicates that the reaction is not fast enough for a significant concentration gradient inside the pores; pore diffusion resistance is commonly neglected when φ is below about 0.5. A large modulus indicates strong internal diffusion limitation.
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