关键词: 重油, 孔内扩散, 受限扩散, 受限因子

Abstract: Because the diffusion resistance of residual oil in the catalyst pore influences the catalytic reaction rate and the utilization of the catalysts，research on diffusion of residual oil in the catalyst pore is of great importance for guiding the hydrogenation catalyst design and improving the utilization of hydrogenation catalyst. This paper summarized the main research methods for studying the restricted diffusion of heavy oil in catalyst pore. The reaction-diffusion kinetic method using under reaction conditions is more practical than the diaphragm cell and adsorptive methods using under non-reaction conditions. The advances of the restrictive factor of heavy oil are also briefly discussed. The analysis of the materials used in diffusion showed that the Well-Defined and Uniform Pore-structure（WDUPS）model catalyst is an ideal porous material in the diffusion study.

Key words: heavy oil, intraparticle diffusion, restricted diffusion, restrictive factor