“…The PMM is used to describe the gas-solid flow in the fixed-bed reactor, and the SPM is used to represent the intraparticle transfer and reaction. These models are briefly summarized in Tables 1 and 2 [22][23][24][25][26][27][28]. The average gas velocity is approximately 0.033 m/s in the porous medium, and the numerical Re number is close to 6.…”