【摘要】 综述催化裂化过程中钒的价态、影响钒价态变化的因素、不同价态钒对催化剂的毒害及其原因,以及相关研究方法、表征手段和主要研究结果。从对催化剂结构和性能两方面的影响看,高价态钒对催化裂化的负面影响远远超过低价态钒。更多还原

【Abstract】 A review concerning the valence state of vanadium on catalysts during catalytic cracking process,factors affecting the variation of vanadium valence states,poisoning effect on catalysts caused by various vanadium oxides and mechanism of poisoning,as well as research methods,characterization tools and essential results,is presented.It can be concluded that the negative effect on the structure and performance of FCC catalysts by high valence state of vanadium species is much more serious than that of by low valence state vanadium species.更多还原