Fig. 4 (A) the correlation between S-edge and Mo-edge concentration and
kHDS; (B) the correlation between fMoand kHDS; (C) the correlation between S-edge
concentration and kDS; (D) the correlation between
S-edge/Mo-edge ratio and kDDS/kHYDratio.
As reported, the dispersion degree of active phases, the concentration
of S-edge and Mo-edge sites plays an important role in the HDS
reaction.[7,21] The correlations between S-edge
and Mo-edge concentration and kHDS, fMoand kHDS, S-edge concentration and kDSand S-edge/Mo-edge ratio and kDDS/kHYDratio are concluded in Fig. 4. Fig. 4A and Fig. 4B disclose that the
higher MoS2 dispersion degree (fMo) and
total concentration of S-edge and Mo-edge will allow a higher DBT HDS
conversion. The correlation between kDS and S-edge
concentration are presented in Fig. 4C. As mentioned before, the S-edge
site can facilitate the selectivity of DDS route in DBT HDS reaction.
Similarly, the result exhibits that the S-edge site can also facilitate
the DS route of THDBT to CHB. From Fig. 4D, higher S-edge/Mo-edge ratio
will indicate a higher kDDS/kHYD value,
confirming that the S-edge/Mo-edge ratio could be well linked with the
HDS selectivity.