Fig. 4: Diffusion behaviors of C4= in H-ZSM-5 zeolites.

Uptake curves of C4= over H-ZSM-5 samples with different length of c-axis: a Z-cS, b Z-cM, c Z-cL. d Correlation of the [010] exposure degrees of H-ZSM-5 zeolites with the diffusion rates fitted by Eq. 6. e, f Uptake curves of C4= over Z-cS and Z-cL with different temperature. g Arrhenius plot of diffusion rates over Z-cS and Z-cL. The detailed conditions of diffusive measurements are displayed in the “Methods” section. The error bars are smaller than the data points in Fig. 4d, g.