RESEARCH PROGRESS ON ACTIVE PHASE MORPHOLOGY AND STRUCTURE OF HYDROTREATING CATALYSTS

Abstract

Abstract: At present, based on the widely accepted Co (Ni)-Mo (W)-S active phase model, a systematic structure-activity relationship study has been carried out with the help of transmission electron microscope (TEM) observed morphology of active phase slabs on hydrotreating catalysts. It was found that morphology and structure of active phase slabs were closely related to the performance of the catalyst. With the development of characterization technology, more detailed structural information such as single atom and metal clusters could be observed by the aberration-corrected scanning transmission electron microscope (Cs-STEM), etc. Therefore, it was necessary to further systematically study the relationship of typical morphologies such as single atom, metal clusters and slabs and their impact on catalytic performance, so as to further clarify the structural characteristics of the ideal active phase, it also provided a theoretical basis for the efficient research and development of new hydrotreating catalysts.

Key words: hydrotreating catalyst, active phase, morphology, structure, TEM, Cs-STEM

References

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