Weibull modulus as an index for reliability control of the mechanical strength data of industrial catalysts

Mechanical strength assessment of industrial solid catalysts is one of the most important steps in their characterization. Defects such as microcracks with different sizes inside the catalyst bulk leads to a wide distribution of mechanical strength data. In this paper it is discussed that the mean value and standard deviation are not sufficient for the describing of mechanical strength of a catalyst sample and it is also shown that have a narrow distribution of strength data is necessary for a reliable sample. After describing the Weibull model, using two catalyst samples with different Weibull modulus, it was shown that sample with higher Weibull modulus of ۵.۸۳ had a more reliable mechanical strength respect to the sample with Weibull modulus of ۳.۱۵.

Keywords:

Reliability , Mechanical strength , Industrial catalyst , Weibull analysis