Fig. 4: Mechanism investigations of ABS trapping with two determination factors.
From: Simple physical mixing of zeolite prevents sulfur deactivation of vanadia catalysts for NOx removal
The logarithm of the deactivation rate was plotted to the framework AlO2 amount. Details of the reaction mechanism study are described in the reaction mechanism investigation section of the Supplementary Materials. Each data was obtained from SO2 aging of physically mixed VWTi with Y zeolite (FAU, black), ZSM-5 (MFI, red), SSZ-13 (CHA, blue) and silica (magenta) (Supplementary Fig. 16). The amount of framework Al was calculated by using theoretical Al amount from Si/Al2 ratio and Alframework/Altotal value from 27Al-NMR data (details in Supplementary Fig. 19). The linearity of the model was shown by linear regression of various zeolites (Supplementary Table 3). Data of silica was included in all fitting results for zero-point (at framework AlO2 amount = 0).
