Sulfide hydrodesulfurization catalysts:structure of the active component and mechanism of the catalytic action

摘要

A new phenomenon in heterogeneous catalysis,namely,oxidative addition of hydrogen to active metal atoms (Ni,Co) within sulfide hydrodesulfurisation catalysts,is considered.The possibility of hydrogen occulsion into the MoS_2 matrix of the active components of these catalysts is demonstrated.The electronic structure of Ni(IV) and Co(III) active sites with d~6 electronic configuration is analysed.The concerted mechanism of thiophene hydrogenolysis on a bimetallic active site is considered and substantiated.The concept of the governing role of the metal-sulfur bond energy in catalysis by metal sulfidesis analysed critically.The bibliography includes 198 references.