Figure 4
Effect of the Ni:Mo molar ratio on Ni K-edge FT-EXAFS spectra of the NiMo(X) catalysts. Ni K-edge FT-EXAFS spectra of the Ni(Y) catalysts are shown in the right-hand side figure as a reference. X-ray absorption spectra were measured at ambient temperature after sulfiding pretreatment at 613 K and 1.1 MPa using the chamber equipped with the PBI windows. |