中文摘要：

内扩散广泛存在于非均相催化反应过程中。重质油因为具有更大的分子尺寸和复杂的组成结构,其在催化转化过程中通过孔道的扩散传质受到显著影响,极大降低了重质油的高效转化和催化剂的有效利用。本文重点对重质油在孔道内扩散传质的主要研究方法（隔膜池、吸附扩散和反应动力学法）和现状、孔内扩散的影响因素以及内扩散对重质油催化转化的影响等方面进行了综述,还探讨了重质油催化转化过程中扩散传质研究的发展方向。

英文摘要：

Intraparticle diffusion is a crucial factor for heterogeneous catalytic processes. Heavy oils are significantly influenced by diffusional transport in catalyst, which reduces the efficient conversion of the feedstocks and the effective utilization of the catalyst. An overview of the methods（diaphragm diffusion cell, adsorptive uptakeand reactive kinetic methods） and advances in diffusivity of heavy oils in pores is presented. Key factors of diffusion of heavy oils, such as temperature, concentration, molecular configuration and catalyst deactivation are discussed. At last, the directions of future development indiffusion of heavy oils are suggested.